R106.3.1 Approval of construction documents. Where the Building
Official issues a permit, the construction documents shall be approved
in writing or by a stamp that states "REVIEWED FOR CODE COMPLIANCE."
One (1) set of construction documents so reviewed shall be retained
by the Building Official. The other set may be kept at the site of
work or made available at the time of inspection and shall be open
to inspection by the Building Official or a duly authorized representative.
|
R108.6 Work commencing before permit issuance. Any person who
commences work requiring a permit on a building, structure, electrical,
gas, mechanical or plumbing system before obtaining the necessary
permits shall be subject to a fee established by the applicable governing
authority that shall be in addition to the required permit fees.
| |
Exceptions:
| |
1.
|
Earthwork.
|
2.
|
Stakeouts and other necessary planning procedures.
|
SECTION R202 DEFINITIONS
|
Revise as follows:
|
PAN FLASHING. Corrosion-resistant flashing at the base of an
opening that is integrated into the building exterior wall to direct
water to the exterior.
|
TABLE R301.2(1): CLIMATIC AND GEOGRAPHIC DESIGN CRITERIA. The
following values shall be entered into the table and footnotes B and
H to the table are amended as follows:
| ||
---|---|---|
Ultimate Wind Speed:
|
115(51)
| |
Ground Snow Load:
|
20
| |
Wind Design Speed:
|
90
| |
Wind Topographic Effects:
|
No
| |
Special Wind Region:
|
No
| |
Wind-Borne Debris Zone:
|
No
| |
Seismic Design Category:
|
B
| |
Weathering:
|
Severe
| |
Frost Line Depth:
|
30 inches
| |
Termite:
|
Moderate to Heavy
| |
Winter Design Temp:
|
6
| |
Ice Barrier Underlayment Required:
|
No
| |
Flood Hazards:
|
09-29-2010
| |
Air Freezing Index:
|
1000
| |
Mean Annual Temp:
|
56.3
| |
Footnotes B and H are amended to read as follows:
| ||
B.
|
The frost line depth may require deeper footings than indicated
in Figure R403.1(1). The jurisdiction shall fill in the frost line
depth column with thirty (30) inches, the minimum depth of footing
below finish grade.
| |
H.
|
The jurisdiction shall fill in this part of the table with "No."
|
R302.1 Exterior walls. Construction, projections, openings and
penetrations of exterior walls of dwellings and accessory buildings
shall comply with Table R302.1(1) as amended; or dwellings equipped
throughout with an automatic sprinkler system installed in accordance
with Section P2904 shall comply with Table R302.1(2).
| |
Exceptions:
| |
1.
|
Walls, projections, openings or penetrations in walls perpendicular
to the line used to determine the fire separation distance.
|
2.
|
Walls of dwellings and accessory structures located on the same
lot
|
3.
|
Detached tool sheds and storage sheds, playhouses and similar
structures exempted from permits are not required to provide wall
protection based on location on the lot. Projections beyond the exterior
wall shall not extend over the lot line.
|
4.
|
Detached garages accessory to a dwelling located within two
(2) feet (610 mm) of a lot line are permitted to have roof eave projections
not exceeding four (4) inches (102 mm).
|
5.
|
Foundation vents installed in compliance with this code are
permitted.
|
6.
|
Cantilevered manufactured fireplaces.
|
7.
|
Roof eave overhangs.
|
8.
|
Uncovered decks.
|
Table R302.1(1)
| |||
---|---|---|---|
Exterior Walls
| |||
Exterior Wall Element
|
Minimum Fire-Resistance Rating
|
Minimum Fire Separation Distance
| |
Walls
|
Fire-resistance rated
|
1 hour - tested in accordance with ASTM E 119 or UL 263 with
exposure from both sides
|
0 feet to <3 feet
|
Not fire-resistance rated
|
0 hours
|
> 3 feet
| |
Projections
|
Fire-resistance rated
|
1 hour on the undersidea, b
|
2 feet
|
Not fire-resistance rated
|
0 hours
|
3 feet
| |
Openings in walls
|
Not allowed
|
N/A
|
< 3 feet
|
25% maximum of wall area
|
0 hours
|
3 feet
| |
Unlimited
|
0 hours
|
3 feet
| |
Penetrations
|
All
|
Comply with Section R302.4
|
< 3 feet
|
None required
|
3 feet
| |
For SI: 1 foot = 304.8 mm
| ||
N/A = Not Applicable
| ||
a.
|
Roof eave fire-resistance rating shall be permitted to be reduced
to zero (0) hours on the underside of the eave if fireblocking is
provided from the wall top plate to the underside of the roof sheathing.
| |
b.
|
Roof eave fire-resistance rating shall be permitted to be reduced
to zero (0) hours on the underside of the eave, provided that gable
vent openings are not installed.
|
R302.2 Townhouses. Common walls separating townhouses shall
be assigned a fire-resistance rating in accordance with Section R302.2,
Item 1 or 2. The common wall shared by two (2) townhouses shall be
constructed without plumbing or mechanical equipment, ducts or vents
in the cavity of the common wall. The wall shall be rated for fire
exposure from both sides and shall extend to and be tight against
exterior walls and the underside of the roof sheathing. Electrical
installations shall be in accordance with Chapters 34 through 43.
Penetrations of the membrane of common walls for electrical outlet
boxes shall be in accordance with Section R302.4.
| |
1.
|
Where a fire sprinkler system in accordance with Section P2904
is provided, the common wall shall be not less than a one-hour fire-resistance-rated
wall assembly tested in accordance with ASTM E 119 or UL 263.
|
2.
|
Where a fire sprinkler system in accordance with Section P2904
is not provided, the common wall shall be not less than a two-hour
fire-resistance-rated wall assembly tested in accordance with ASTM
E 119 or UL 263, or the common wall may be two (2) independent one-hour
fire-resistance-rated wall assemblies.
|
R302.5.1 Opening protection. Openings from a private garage
directly into a room used for sleeping purposes shall not be permitted.
Other openings between the garage and residence shall be equipped
with solid wood doors not less than one and three-eighths (1 3/8)
inches (35 mm) in thickness, solid or honeycomb-core steel doors not
less than one and three-eighths (1 3/8) inches (35 mm) thick,
or 20-minute fire-rated doors.
|
R302.5.2 Duct penetration. Ducts in the garage and ducts penetrating
the walls or ceilings separating the dwelling from the garage shall
be constructed of a minimum No. 28 gauge (0.48 mm) sheet steel or
other approved material and shall not have openings into the garage.
|
R302.13 Fire protection of floors. Floor assemblies that are
not required elsewhere in this code to be fire-resistance rated shall
be provided with one-half (1/2) inch (12.7 mm) gypsum wallboard membrane,
five-eights (5/8) inch (16 mm) wood structural panel membrane, or
equivalent on the underside of the floor framing member. Penetrations
or openings for ducts, vents, electrical outlets, lighting, devices,
luminaires, wires, speakers, drainage, piping and similar openings
or penetrations shall be permitted. Fire blocking, draft stopping,
and/or additional framing is not required.
| |
Exceptions:
| |
1.
|
Floor assemblies located directly over a space protected by
an automatic sprinkler system in accordance with Section P2904, NFPA
13D, or other approved equivalent sprinkler system.
|
2.
|
Floor assemblies located directly over a crawl space not intended
for storage or fuel-fired appliances.
|
3.
|
Portions of floor assemblies shall be permitted to be unprotected
where complying with the following:
|
3.1.
|
The aggregate area of the unprotected floor assembly does not
exceed one hundred (100) square feet per HVAC zone.
|
3.2.
|
Areas of the floor assembly covered by HVAC metal plenum, trunk
lines, and steel structural beams shall be considered protected. Gypsum
wallboard membrane shall be within one (1) inch of all previously
listed items.
|
4.
|
Wood floor assemblies using dimension lumber or structural composite
lumber equal to or greater than two-inch-by-ten-inch (50.8 mm by 254
mm) nominal dimension, or other approved floor assemblies demonstrating
equivalent fire performance.
|
R303.3 Bathrooms. Bathrooms, water closet compartments and other
similar rooms shall be provided with aggregate glazing area in windows
of not less than three (3) square feet (0.3 m2), one-half (1/2) of which must be openable.
|
Exception: The glazed areas shall not be required where artificial
light and a local exhaust system are provided. The minimum local exhaust
rates shall be determined in accordance with Section M1507. Exhaust
air from the space shall be exhausted directly to the outdoors, to
a ventilated soffit, or a gabled end vent.
|
R303.4 Mechanical ventilation. Where the air infiltration rate
of a dwelling unit is three (3) air changes per hour or less where
tested with a blower door at a pressure of two-tenths (0.2) inch w.c.
(50 Pa) in accordance with Section N1102.4.1.2, the dwelling unit
shall be provided with whole-house mechanical ventilation in accordance
with Section M1507.3.
|
R303.5.2 Exhaust openings. Exhaust air shall not be directed
below six (6) feet and eight (8) inches onto public walkways.
|
R303.8 Exterior stairway illumination. Exterior stairways shall
be provided with an artificial light source. Exterior stairways providing
access to a basement from the outdoor grade level shall be provided
with an artificial light source located at the bottom landing of the
stairway.
|
R309.5 Fire sprinklers. Private garages shall be protected by
fire sprinklers where the garage wall has been designed based on Table
302.1(2), Footnote a, and the homeowner has opted to purchase a fire
sprinkler system for their residence, as per Section 67.281, RSMo.
Sprinklers in garages shall be connected to an automatic sprinkler
system that complies with Section P2904. Garage sprinklers shall be
residential sprinklers or quick-response sprinklers, designed to provide
a density of 0.05 gpm/ft2. Garage doors
shall not be considered obstructions with respect to sprinkler placement.
|
R311.3 Floors and landings at exterior doors. There shall be
a landing or floor at each required egress exterior door. The width
of each landing shall not be less than the door served. Every landing
shall have a dimension of not less than thirty six (36) inches (914
mm) measured in the direction of travel. The slope at exterior landings
shall not exceed 1/4 unit vertical in twelve (12) units horizontal
two percent (2%).
|
Exception: Exterior balconies less than sixty (60) square feet
(5.6m2) and only accessible from a door
are permitted to have a landing less than thirty-six (36) inches (914
mm) measured in the direction of travel.
|
R311.3.2 Floor elevations for other exterior doors. Doors other
than the required egress door shall be provided with landings or floors
not more than seven and three-fourths (7 3/4) inches (196 mm)
below the top of the threshold.
|
Exception: A top landing is not required where a stairway of
four (4) or fewer risers is located on the exterior side of the door,
provided that door does not swing over the stairway.
|
R311.7.5 Stair treads and risers. Stair treads and risers shall
meet the requirements of this Section. For the purposes of this Section,
dimensions and dimensioned surfaces shall be exclusive of carpets,
rugs or runners.
|
R311.7.5.1 Risers. The riser height shall be not more than seven
and three-fourths (7 3/4) inches (196 mm). The riser shall be
measured vertically between leading edges of the adjacent treads.
The greatest riser height within any flight of stairs shall not exceed
the smallest by more than three-eights (3/8) inch (9.5 mm). Risers
shall be vertical or sloped from the underside of the nosing of the
tread above at an angle not more than thirty degrees (30°) (0.51
rad) from the vertical. Open risers are permitted, provided that the
openings located more than thirty (30) inches (762 mm), as measured
vertically, to the floor or grade below do not permit the passage
of a four-inch-diameter (102 mm) sphere.
| |
Exceptions:
| |
1.
|
The opening between adjacent treads is not limited on spiral
stairways.
|
2.
|
The riser height of spiral stairways shall be in accordance
with Section R311.7.10.1.
|
R311.7.5.2 Treads. The tread depth shall be not less than ten
(10) inches (254 mm). The tread depth shall be measured horizontally
between the vertical planes of the foremost projection of adjacent
treads and at a right angle to the tread's leading edge. The greatest
tread depth within any flight of stairs shall not exceed the smallest
by more than three-eighths (3/8) inch (9.5 mm).
|
R311.7.5.2.1 Winder treads. Winder treads shall have a tread
depth of not less than ten (10) inches (254 mm) measured between the
vertical planes of the foremost projection of adjacent treads at the
intersections with the walkline. Winder treads shall have a tread
depth of not less than six (6) inches (152 mm) at any point within
the clear width of the stair. Within any flight of stairs, the largest
winder tread depth at the walk line shall not exceed the smallest
winder tread by more than three-eighths (3/8) inch (9.5 mm). Consistently
shaped winders at the walkline shall be allowed within the same flight
of stairs as rectangular treads and do not have to be within three-eighths
(3/8) inch (9.5 mm) of the rectangular tread depth.
| |
Exception: The tread depth at spiral stairways shall be in accordance
with Section R311.7.10.1.
| |
Exceptions:
| |
1.
|
For remodeling projects in existing homes, homes in urban, infill
or high-density developments, or historical buildings or dwellings,
riser height of not more than eight and one-fourths (8 1/4) inches
(210 mm) and tread depth of not more than nine (9) inches (229 mm)
will be allowed.
|
2.
|
For remodeling projects in existing homes, stair tread and riser
will be allowed to mimic previous or existing conditions.
|
R311.7.6 Landings for stairways. There shall be a floor or landing
at the top and bottom of each stairway. The width perpendicular to
the direction of travel shall be not less than the width of the flight
served. Landings of shapes other than square or rectangular shall
be permitted, provided the depth at the walk line and the total area
is not less than that of a quarter circle with a radius equal to the
required landing width. Where the stairway has a straight run, the
depth in the direction of travel shall not be less than thirty-six
(36) inches (914 mm).
|
Exception: A floor or landing is not required at the top of
an interior or exterior flight of stairs, including stairs in an enclosed
garage, provided that a door does not swing over the stairs.
|
R312.1.1 Where required. Guards shall be located along open-sided
walking surfaces, including stairs, ramps and landings that are located
more than thirty (30) inches (762 mm) measured vertically at the edge
of the walking surface to the floor or grade below. Insect screening
shall not be considered as a guard.
|
R312.2 Window fall protection. Window fall protection shall
be provided in accordance with Sections R312.2.1 and R312.2.2.
|
R312.2.1 Window sills, in dwelling units, where the top of the
sill of an operable window opening is located less than twenty-four
(24) (310 mm) above the finished floor and greater than seventy-two
(72) inches (1,829 mm) above the finished grade or other surface below
on the exterior of the building, the operable window shall comply
with one (1) of the following:
| |
1.
|
Operable windows with openings that will not allow a four-inch
diameter (102 mm) sphere to pass through the opening where the opening
is in its largest open position.
|
2.
|
Operable windows that are provided with window fall prevention
devices that comply with ASTM F 2090.
|
3.
|
Operable windows that are provided with window opening control
devices that comply with Section R312.2.2.
|
R312.2.2 Window opening control devices. Window opening control
devices shall comply with ASTM F 2090. The window opening control
device, after operation to release the control device allowing the
window to fully open, shall not reduce the new clear opening area
of the window unit to less than the area required by Section R310.2.1.
|
R313.1 Townhouse automatic fire sprinkler systems. An automatic
residential fire sprinkler system shall be installed in townhouses,
in accordance with Section 67.281, RSMo.
|
Exception: An automatic residential fire sprinkler system shall
not be required where additions or alterations are made to existing
townhouses that do not have an automatic residential fire sprinkler
system installed.
|
R313.1.1 Design and installation. Automatic residential fire
sprinkler systems for townhouses shall be designed and installed in
accordance with Section P2904 or NFPA 13D.
|
R313.2 One- and two-family dwellings automatic fire systems.
An automatic residential fire sprinkler system shall be installed
in one- and two-family dwellings. A builder of a single-family dwelling
or residence or multiunit dwellings of four (4) or fewer units shall
offer to any purchaser on or before the time of entering into the
purchase contract the option, at the purchaser's cost, to install
or equip fire sprinklers in the dwelling, residence, or unit. Notwithstanding
any other provision of law to the contrary, no purchaser of such a
single-family dwelling, residence, or multiunit dwelling shall be
denied the right to choose or decline to install a fire sprinkler
system in such dwelling or residence being purchased by any code,
ordinance, rule, regulation, order, or resolution by any county or
other political subdivision. Any county or other political subdivision
shall provide in any such code, ordinance, rule, regulation, order,
or resolution the mandatory option for purchasers to have the right
to choose and the requirement that builders offer to purchasers the
option to purchase fire sprinklers in connection with the purchase
of any single-family dwelling, residence, or multiunit dwelling of
four (4) or fewer units.
|
Exception: An automatic residential fire sprinkler system shall
not be required for additions or alterations to existing buildings
that are not already provided with an automatic residential sprinkler
system.
|
R313.2.1 Design and installation. Automatic residential fire
sprinkler systems shall be designed and installed in accordance with
Section P2904 or NFPA 13D.
|
R323.1 General. This Section applies to storm shelters where
constructed as separate detached buildings or where constructed as
safe rooms within buildings for the purpose of providing refuge from
storms that produce high winds, such as tornadoes and hurricanes.
In addition to other applicable requirements in this code, storm shelters
shall be constructed in accordance with ICC/NSSA-500, except when
located below grade or if basement walls are fully constructed with
concrete.
|
R403.1.7 Footings on or adjacent to slopes. The placement of
buildings and structures on or adjacent to slopes steeper than one
(1) unit vertical in three (3) units horizontal (thirty-three and
three tenths percent (33.3%) slope) shall conform to Sections R403.1.7.1
through R403.1.7.4 or plans as signed and sealed by a registered engineer.
|
Table R404.1.2(10) Concrete Foundation Walls
| ||
---|---|---|
Maximum Wall Height
|
Maximum Depth of Unbalanced Backfill
|
Minimum Nominal Wall Thickness
|
7 feet 0
inches
|
6 feet 0 inches or less
7 feet 0 inches
|
8 inches
10 inches (Note a)
|
8 feet 0
inches
|
6 feet 0 inches or less
7 feet 0 inches
8 feet 0 inches
|
8 inches (Note a)
8 inches (Note a)
8 inches (Note a)
|
9 feet 0
inches
|
6 feet 0 inches or less
7 feet 0 inches
8 feet 0 inches
9 feet 0 inches
|
10 inches (Note b)
10 inches (Note b)
10 inches (Note b)
10 inches (Note b)
|
Note a:
|
Concrete foundation walls may be constructed a minimum of nominal
eight (8) inches thick where the wall height from the top of the footing
to the top of the wall does not exceed eight (8) feet. A minimum of
two #4 reinforcing bars shall be placed horizontally in the top and
bottom of the foundation wall. A minimum of two #5 reinforcing bars
shall be provided around all window and door openings in concrete
foundation and basement walls; bars shall extend a minimum of twenty-four
(24) inches beyond the corners of the openings.
|
Note b:
|
Concrete foundation walls may be constructed a minimum of nominal
ten (10) inches thick. A minimum of two #5 reinforcing bars shall
be placed horizontally in the top, middle, and bottom of the foundation
wall. A minimum of two #5 reinforcing bars shall be provided around
all window and door openings in concrete foundation and basement walls;
bars shall extend a minimum of twenty-four (24) inches beyond the
corners of the openings.
|
The concrete minimum nominal wall thickness shall be eight (8)
inches for foundation walls in soil classes SC, MH, ML-MC and inorganic
CL when the maximum wall height is eight (8) feet.
| |
The concrete minimum wall thickness shall be ten (10) inches
for foundation walls in soil classes SC, MH, ML-CL and inorganic CL
when the maximum wall height is nine (9) feet.
| |
The concrete minimum wall thickness shall be twelve (12) inches
for foundation walls in soil classes SC, MH, ML-CL and inorganic CL
when the maximum wall height is ten (10) feet.
|
405.1 Concrete or masonry foundations. Drains shall be provided
around concrete or masonry foundations that retain earth and enclose
habitable or usable spaces located below grade. Drainage tiles, gravel
or crushed stone drains, perforated pipe or other approved systems
or materials shall be installed at or below the area to be protected
and shall discharge by gravity or mechanical means into an approved
drainage system. Gravel or crushed stone drains shall extend not less
than one (1) foot (305 mm) beyond the outside edge of the footing
and six (6) inches (152 mm) above the top of the footing and be covered
with an approved filter membrane material. The top of open joints
of drain tiles shall be protected with strips of building paper. Except
where otherwise recommended by the drain manufacturer, perforated
drains shall be surrounded with an approved filter membrane or the
filter membrane shall cover the washed gravel or crushed rock covering
the drain. Drainage tiles or perforated pipe shall be placed on a
minimum of two (2) inches (51 mm) of washed gravel or crushed rock
not less than one (1) sieve size larger than the tile joint opening
or perforation and covered with not less than six (6) inches (152
mm) of the same material.
| |
Exceptions:
| |
1.
|
A drainage system is not required where the foundation is installed
on well-drained ground or sand-gravel mixture soils according to the
Unified Soil Classification System, Group I soils, as detailed in
Table R405.1.
|
2.
|
Drains provided as detailed in Section R405.1.2 are approved
as an alternative method to meet the requirements of this Section.
|
R405.1.2 Soil evaluations. An evaluation of the soil for the
presence or absence of groundwater is required. The evaluation report
shall be based on either a subsurface soil investigation or satisfactory
data from adjacent areas together with an inspection of the excavation
prior to pouring concrete.
|
R405.1.2.1 Groundwater present. Provide drain tile, perforated
pipe or other approved foundation drainage systems (such as water
channel system) around perimeter of the outside of the foundation
and inside the foundation. Drain discharge shall be by gravity to
daylight or be connected to a basement floor sump.
|
R405.1.2.2 No groundwater present. Provide drain tile, perforated
pipe or other approved foundation drainage systems (such as water
channel system) around perimeter of the outside of the foundation
or inside the foundation. Drain discharge shall be by gravity to daylight
or be connected to a basement floor sump.
|
R405.1.2.3 Filter membranes. An approved filter membrane shall
be placed over the top of the joints/pipe perforations. The tile/pipe
shall be placed on two (2) inches minimum of gravel or crushed stone
and have six (6) inches of minimum cover.
|
R405.1.2.4 Drainage system. A drainage system shall discharge
by gravity to daylight or be connected to an approved sump (fifteen
(15) inches in diameter by eighteen (18) inches deep with fitted cover).
A sump pump shall be provided if the basement is finished or partially
finished with pump discharge by an approved method.
|
R507.2.4 Deck lateral load connection. The lateral load connection
required by Section R507.1 shall be permitted to be in accordance
with Figure R507.2.3(1) or R507.2.3(2). Where the lateral load connection
is provided in accordance with Figure R507.2.3(1), hold-down tension
devices shall be installed in not less than two (2) locations per
deck, within twenty-four (24) inches of each end of the deck. Each
device shall have an allowable stress design capacity of not less
than one thousand five hundred (1,500) pounds (6672 N). Where the
lateral load connections are provided in accordance with Figure R507.2.3(2),
the hold down tension devices shall be installed in not less than
four (4) locations per deck, and each device shall have an allowable
stress design capacity of not less than seven hundred fifty (750)
pounds (3336 N).
|
R602.3.5 Braced wall panel uplift load path. Braced wall panels
located at exterior walls that support roof rafters or trusses (including
stories below top story) shall have the framing members connected
in accordance with one (1) of the following:
| |
1.
|
Fastening in accordance with Table 602.3(1) where:
|
1.1
|
The ultimate design wind speed does not exceed 115 - 125 mph
(51 - 56 m/s), the wind exposure category is B, the roof pitch is
5:12 or greater, and the roof span is thirty-two (32) feet (9,754
mm) or less.
|
1.2
|
The net uplift value at the top of a wall does not exceed 100
plf (146 N/mm). The net uplift value shall be determined in accordance
with Section R802.11 and shall be permitted to be reduced by 60 plf
(86 N/mm) for each full wall above.
|
2.
|
Where the net uplift value at the top of a wall exceeds 100
plf (146 N/mm), installing approved uplift framing connectors to provide
a continuous load path from the top of the wall to the foundation
or to a point where the uplift force is 100 plf (146 N/mm) or less.
The net uplift value shall be as determined in Item 1.2 above.
|
2.
|
Wall sheathing and fasteners designed to resist combined uplift
and shear forces in accordance with accepted engineering practice.
|
R602.7.5 Supports for headers. Headers shall be supported on
each end with one (1) or more jack studs or with approved framing
anchors in accordance with Table R602.7(1) or R602.7.(2). The full-height
stud adjacent to each end of the header shall be end nailed to each
end of the header with four-16d nails (three and five-tenths (3.5)
inches by one hundred thirty-five thousandths (0.135) inches). The
minimum number of full-height studs at each end of a header shall
be in accordance with Table R602.7.5.
|
Table R602.7.5
| ||
---|---|---|
Minimum Number of Full Height Studs at Each End of Headers in
Exterior Walls
| ||
Header Span
(feet)
|
Maximum Stud Spacing
(inches)
[per Table R602.3(5)]
| |
16
|
24
| |
<3
|
1
|
1
|
4
|
1
|
1
|
8
|
1
|
1
|
12
|
1
|
1
|
16
|
1
|
1
|
R602.13 Alternate simplified bracing method for one- and two-family
dwellings when the entire structure is sheathed with wood structural
panels and located in wind exposure A or B. The construction documents
shall detail the locations and widths of all braced wall panels in
accordance with this Section.
|
R602.13.1 Wood structural sheathing. The building exterior walls
shall be sheathed with seven-sixteenths (7/16) inch (11.1 mm) or thicker
plywood or OSB wood structural panels. The wood structural panels
shall be applied to all exterior walls, gable ends and band boards.
All vertical joints between panels shall be blocked. Horizontal joints
in braced wall panels shall be blocked.
|
R602.13.2 Braced wall panel locations. Braced wall panels shall
be located in every exterior braced wall line in accordance with the
following criteria:
| |
1.
|
The outside edge of the first braced wall panel meeting the
width established in Table R602.13.3 shall be a maximum of twelve
and five-tenths (12.5) feet (3,810 mm) or less from each end of the
braced wall line. The outside stud of the first braced wall panels
closest to the end of the braced wall line shall be secured with a
hold-down device securing the end stud to the foundation with a minimum
uplift design value of eight hundred (800) pounds.
|
Exception: The eight-hundred-pound hold-down device is not required
when the braced wall panel is placed at the end of the braced wall
line and there is a twenty-four (24) inch (610 mm) wide full height
sheathed wall placed ninety degrees (90°) to the end of the braced
wall line and panel.
| |
2.
|
The center line spacing of braced wall panels in a braced wall
line may not exceed twenty-five (25) feet (7,620 mm).
|
R602.13.3 Braced wall panel widths. Braced wall panel locations
shall be shown on the floor plans or elevation views and meet the
widths established in Table R602.13.3.
|
Table 602.13.3
| ||||||
---|---|---|---|---|---|---|
Simplified Bracing Panel Widths
Width of Solid Panela, b
| ||||||
8-foot wall height
|
9-foot wall height
|
10-foot wall height
|
12-foot wall height
| |||
Plywood/OSB Panel
|
3:1
|
32 inches
|
36 inches
|
40 inches
|
48 inches
| |
Simplified Portal Wallc
|
6:1
|
16 inchesd
|
18 inchesd
|
20 inchesd
|
24 inchesd
| |
a.
|
Linear interpolation is permitted.
| |||||
b.
|
Wall height is the vertical distance from the bottom of the
sole/sill plate to the top of the double top plate. An additional
two (2) inch (50.8 mm) variation in height is allowed for pre-cut
stud framing.
| |||||
c.
|
The simplified portal wall, if applicable, shall be constructed
in accordance with the applicable detail in Figure R602.13.3. The
designer shall provide this detail on the construction documents.
| |||||
d.
|
The simplified portal wall width assumes the beam is placed
under the top plate of the wall. A smaller width may be calculated
for a lower top of beam height using the 6:1 height-to-width ratio.
|
R602.13.4 Corner framing. The exterior wall corners shall be
constructed in accordance with the applicable detail in Figure R602.10.10.4.
|
Exception: Braced wall panels located in accordance with Section
R602.13.2.
|
R602.13.5 Braced wall line spacing. When the perpendicular distance
between the exterior braced wall lines exceeds fifty (50) feet (15,240
mm), the registered design professional shall include the following
certification on the drawings: The interior and exterior wall configuration
braces for the structure in accordance with or equivalent to the lateral
bracing provisions of Section R602.10 of the International Residential
Code, 2009 edition or Section 2305 of the International Building Code,
2009 edition.
|
R602.13.6 Maximum wall height. Walls greater than twelve (12)
feet (3,658 mm) (twelve (12) feet two (2) inches (3,708 mm) actual)
in height and twelve (12) feet (3,658 mm) in width shall be designed
and detailed by the registered design professional to resist wind
loads in both the longitudinal and transverse directions.
|
OVER RAISED WOOD FLOOR OR SECOND FLOOR
WOOD STRUCTURAL PANEL OVERLAP OPTION
Figure R602.13.3
SIMPLIFIED PORTAL WALL
|
a.
|
CRIPPLE WALL FRAMING CONSISTING OF STUD FRAMING, SINGLE BOTTOM
PLATE, AND DOUBLE TOP PLATE MAY BE ADDED TO THE TOP OF THE NARROW
PORTAL WALL AS LONG AS THE COMBINED HEIGHT OF THE TWO WALLS IS LESS
THAN OR EQUAL TO TWELVE (12) FEET AND THE TWO WALLS ARE STRAPPED TOGETHER
ON THE INTERIOR SIDE WITH A 16 GUAGE METAL ONE AND ONE HALF (1 1/2)
INCH WIDE BY TWENTY-ONE-INCH LONG STRAP. A MINIMUM TEN (10) INCHES
OF THE STRAP SHALL BE CONNECTED TO EACH WALL OR GABLE TRUSS WITH 9-16D
NAILS FOR A TOTAL OF 18-16D NAILS IN THE ENTIRE STRAP. STRAPS SHALL
BE LOCATED AT EACH END OF THE CONNECTED WALLS OR WALL AND GABLE TRUSS
WHERE SPACE ALLOWS FOR THE TEN-INCH LENGTH OF STRAP. THE SPACING BETWEEN
THE STRAPS MAY NOT EXCEED FOUR (4) FEET ON CENTER. THE STRAPS SHALL
NOT BE BENT HORIZONTALLY TO ACCOMMODATE WOOD FRAMING. IF APPLICABLE,
NAILERS SHALL BE ADDED TO ONE OF THE WALLS OR GABLE END USING A MINIMUM
OF 9-16D NAILS TO CREATE THE VERTICAL PLANE NEEDED TO MOUNT THE STRAP.
|
CORNER DETAIL
USED IN CONJUNCTION WITH SIMPLIFIED PORTAL WALL
FIGURE R602.10.10.4
SIMPLIFIED BRACING EXTERIOR CORNER FRAMING
|
a.
|
END STUD INDICATED ON THE ABOVE DETAILS MAY BE SHIFTED 7/16"
TO ALLOW STUD FACE TO BE ALIGNED WITH SHEATHING, OR AN OPTIONAL NON-STRUCTURAL
FILLER PANEL MAY BE USED.
|
R905.2.8.2 Valleys. Valley linings shall be installed in accordance
with the manufacturer's instructions before applying shingles. Valley
linings of the following types shall be permitted:
| |
1.
|
For open valleys (valley lining exposed) lined with metal, the
valley lining shall be not less than twenty-four (24) inches (610
mm) wide and of any of the corrosion-resistant metals in Table R905.2.8.2.
|
2.
|
For open valleys, valley lining of two (2) plies of mineral-surfaced
roll roofing, complying with ASTM D 3909 or ASTM D 6380 Class M, shall
be permitted. The bottom layer shall be eighteen (18) inches (457
mm) and the top layer not less than thirty-six (36) inches (914 mm)
wide.
|
3.
|
For closed valleys (valley covered with shingles), valley lining
of one (1) two (2) ply of smooth roll roofing No. 15 felt complying
with ASTM D 6380 and not less than thirty-six (36) inches wide (914
mm) ASTM D 226 Type I, ASTM D 4869 Type I, or ASTM D 6757, or valley
lining as described in Item 1 and 2 shall be permitted. Self-adhering
polymer modified bitumen underlayment complying with ASTM D 1970 shall
be permitted in lieu of the lining material.
|
R905.2.8.5 Drip Edge. A drip edge shall be provided at eaves
and rake edges of shingle roofs. Adjacent segments of drip edge shall
be overlapped not less than two (2) inches (51 mm). Drip edges shall
extend not less than one-fourth (1/4) inch (6.4 mm) below the roof
sheathing and extend up back onto the roof deck not less than two
(2) inches (51 mm). Drip edges shall be mechanically fastened to the
roof deck at not more than twelve (12) inches (305 mm) o.c. with fasteners
as specified in Section R905.2.5. Underlayment shall be installed
over the drip edge along eaves and under the underlayment along rake
edges.
|
R1005.7 Factory-built chimney offsets. Where a factory-built
chimney assembly incorporates offsets, no part of the chimney shall
be at an angle of more than thirty degrees (30°) (0.52 rad) from
vertical at any point in the assembly, and the chimney assembly shall
not include more than four (4) elbows.
|
Exception: When chimneys are installed per manufacturer's installation
instructions.
|
R1006.1.1 Factory-built fireplaces. Exterior combustion air
ducts for factory-built fireplaces shall be a listed component of
the fireplace or equivalent and shall be installed according to the
fireplace manufacturer's instructions.
|
R1006.2 Exterior air intake. The exterior air intake on masonry
fireplaces shall be capable of supplying combustion air from the exterior
of the dwelling or from spaces within the dwelling ventilated with
outdoor air such as non-mechanically ventilated crawl or attic spaces.
The exterior air intake shall not be located within the garage or
basement of the dwelling. The exterior air intake, for other than
listed factory-built fireplaces, shall not be located at an elevation
higher than the firebox. The exterior air intake shall be covered
with a corrosion-resistant screen of one-quarter (1/4) inch (6.4 mm)
mesh.
|
N1101.4 (R102.1.1) Above code programs. The Building Official
or other authority having jurisdiction shall be permitted to deem
a national, state or local energy-efficiency program to exceed the
energy efficiency required by this code. Buildings approved in writing
by such an energy-efficiency program shall be considered in compliance
with this code. The requirements identified as "mandatory" in this
Chapter, as applicable, shall be met.
|
N1101.5 (R103.2) Information on construction documents. Construction
documents shall be drawn to scale upon suitable material. Electronic
media documents are permitted to be submitted when approved by the
building official. Construction documents shall be of sufficient clarity
to indicate the location, nature and extent of the work proposed,
and show in sufficient detail pertinent data and features of the building,
systems and equipment as herein governed. Details shall include, but
are not limited to, as applicable:
| |
1.
|
Insulation materials and their R values.
|
2.
|
Fenestration. U factors and SHGCs.
|
3.
|
Area weighted U factor and SHGC calculations.
|
4.
|
Mechanical system design criteria.
|
5.
|
Mechanical and service water heating system and equipment types,
sizes and efficiencies.
|
6.
|
Equipment and system controls.
|
7.
|
Duct sealing, duct and pipe insulation and location.
|
8.
|
Air sealing details.
|
N1101.5.1 (R103.2.1) Thermal envelope depiction. The building's
thermal envelope shall be represented on the construction drawings.
|
N1101.6 (R202) Defined terms.
|
PROJECTION FACTOR. The ratio of the horizontal depth of an overhang,
eave, or permanently attached shading device, divided by the distance
measured vertically from the bottom of the fenestration glazing to
the underside of the overhang, eave, or permanently attached shading
device.
|
N1101.13 (R401.2) Compliance. Projects shall comply with one
(1) of the following:
| |
1.
|
Sections N1101.14 through N1104 as amended.
|
2.
|
Section N1105 and the provisions of Sections N1101.14 through
N1104 labeled "Mandatory."
|
3.
|
An energy rating index (ERI) approach in Section N1106.
|
N1101.14 (R401.3) Certificate (Mandatory). A permanent certificate
shall be completed by the builder or registered design professional
and posted on a wall in the space where the furnace is located, a
utility room or an approved location inside the building. Where located
on an electrical panel, the certificate shall not cover or obstruct
the visibility of the circuit directory label, service disconnect
label or other required labels. The certificate shall list the predominant
R values of insulation installed in or on ceiling/roof, walls, foundation
(slab, basement wall, crawl space wall and/or floor) and ducts outside
conditioned spaces; U factors for fenestration and the solar heat
gain coefficient (SHGC) of fenestration, and the results from any
required duct system and building envelope air leakage testing done
on the building. Where there is more than one (1) value for each component,
the certificate shall list the value covering the largest area. The
certificate shall list the types and efficiencies of heating, cooling
and service water heating equipment. Where a gas fired unvented room
heater," electric furnace, or baseboard electric heater is installed
in this residence, the certificate shall list "gas-fired unvented
room heater," "electric furnace" or "baseboard electric heater," as
appropriate. An efficiency shall not be listed for gas-fired unvented
room heaters, electric furnaces or electric baseboard heaters.
|
Table N1102.1.2 (R402.1.2)
| ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
Insulation and Fenestration Requirements by Componenta
| ||||||||||
Climate Zone
|
Fenestra-tion U-Factorb
|
Skylightb U-Factor
|
Glazed Fenestra-tion SHGCb, c
|
Ceiling R-Value
|
Wood Frame Wall R-Value
|
Mass Wall R-Valuei
|
Floor R-Value
|
Basementc Wall R-Value
|
Slabd R-Value & Depth
|
Craw Spacec Wall R-Value
|
1
|
NR
|
0.75
|
0.25
|
30
|
13
|
3/4
|
13
|
0
|
0
|
0
|
2
|
0.40
|
0.65
|
0.25
|
38
|
13
|
4/6
|
13
|
0
|
0
|
0
|
3
|
0.35
|
0.55
|
0.25
|
38
|
20 or 13 + 5h
|
8/13
|
19
|
5/13i
|
0
|
5/13
|
0.35
|
0.40
|
40
|
20 or 13 + 5
|
10/13
| ||||||
4 except Marine
|
0.40
|
0.55
|
NR
|
38
|
13
|
8/13
|
19
|
0i
|
10, 2 ft
|
10/13
|
5 and Marine 4
|
0.32
|
0.55
|
NR
|
49
|
20 or 13 + 5h
|
13/17
|
30c
|
15/19
|
10, 2 ft
|
15/19
|
6
|
0.32
|
0.55
|
NR
|
49
|
20 + 5 or 13 + 10h
|
15/20
|
30e
|
15/19
|
10, 4 ft
|
15/19
|
7 and 8
|
0.32
|
0.55
|
NR
|
49
|
20 + 5 or 13 + 10h
|
19/21
|
38g
|
15/19
|
10, 4 ft
|
15/19
|
For SI: 1 foot = 304.8 mm.
| |
a.
|
R-Values are minimums. U-factors and SHGC are maximums.
When insulation is installed in a cavity which is less than the label
or design thickness of the insulation, the installed R-value of the
insulation shall not be less than the R-value specified in the table.
|
b.
|
The fenestration U-factor column excludes skylights.
The SHGC column applies to all glazed fenestration. Exception: Skylights
may be excluded from glazed fenestration SHGC requirements in Climate
Zones 1 through 3 where the SHGC for such skylights does not exceed
0.30.
|
c.
|
"15/19" means R-15 continuous insulation on the interior
or exterior of the home or R-19 cavity insulation at the interior
of the basement wall. "15/19" shall be permitted to be met with R-13
cavity insulation on the interior of the basement wall plus R-5 continuous
insulation on the interior or exterior of the home. "10/13" means
R-10 continuous insulation on the interior or exterior of the home
or R-13 cavity insulation at the interior of the basement wall.
|
d.
|
R-5 shall be added to the required slab edge R-values
for heated slabs. Insulation depth shall be the depth of the footing
or two (2) feet, whichever is less in Zones 1 through 3 for heated
slabs.
|
e.
|
There are no SHGC requirements in the Marine Zone.
|
f.
|
Basement wall insulation is not required in warm-humid
locations as defined by Figure N1101.10 or Table N1101.10.
|
g.
|
Or insulation sufficient to fill the framing cavity,
R-19 minimum.
|
h.
|
The first value is cavity insulation, the second value
is continuous insulation, so "13+5" means R-13 cavity insulation plus
R-5 continuous insulation.
|
i.
|
The second R-value applies when more than half of the
insulation is on the interior of the mass wall.
|
j.
|
Exception: Unfinished basements may have up to a maximum
of twenty percent (20%) of the total basement wall area exposed above
the outside finished grade/ground level as uninsulated concrete foundation
walls. The foundation wall area above the outside grade/ground level
that may be uninsulated is determined by the formula [0.20 times the
basement wall height of all walls (including insulated exterior frame
walls for walkout basements and walls common to both basement and
attached garages) times the perimeter of these basement walls]. In
unfinished areas, the basement foundation wall insulation shall extend
down to the basement floor slab or to a minimum of twenty-four (24)
inches below outside finished grade when the grade is above the floor
slab elevation.
|
N1102.1.3 (R402.1.3) R-value computation. Insulation material
used in layers, such as framing cavity insulation, or continuous insulation
shall be summed to compute the corresponding component R-value. The
manufacturer's settled R-value shall be used for blown insulation.
Computed R-values shall not may include an R-value for other building
materials or air films. Where insulated siding is used for the purpose
of complying with the continuous insulation requirements of Table
N1102.1.2, the manufacturer's labeled R-Value for insulated siding
shall be reduced by R-0.6.
|
N1102.1.5 (R402.1.5) Total UA alternative. If the total building
envelope UA (sum of U-factor times assembly area) is less than or
equal to the total UA resulting from using the U-factors in Table
N1102.1.4 (multiplied by the same assembly area as in the proposed
building), the building shall be considered in compliance with Table
N1102.1.2. The UA calculation shall be done using a method consistent
with the ASHRAE Handbook of Fundamentals and shall include the thermal
bridging effects of framing materials. The SHGC requirements shall
be met in addition to UA compliance.
|
Exception: Glazed fenestration SHGC. In Climate Zone 4, permanently
shaded vertical fenestration shall be permitted to satisfy SHGC requirements.
The projection factor of an overhang, eave, or permanently attached
shading device shall be greater than or equal to the value listed
in Table N1102.2.2.1 for the appropriate orientation. The minimum
projection shall extend beyond each side of the glazing a minimum
of twelve (12) inches. Each orientation shall be rounded to the nearest
cardinal orientation (+/- forty-five degrees (45°) or 0.79 rad)
for purposes of calculations and demonstrating compliance.
|
Table N1102.1.5
| ||
---|---|---|
Minimum Projection Factor Required by Orientation for SHGC Exception
| ||
Orientation
|
Projection Factor
| |
North
|
>=0.40a
| |
South
|
>=0.20
| |
East
|
>=0.50
| |
West
|
>=0.50
|
a.
|
For the north orientation, a vertical projection located on
the west-edge of the fenestration with the equivalent of PF>=0.15
shall also satisfy the minimum projection factor requirement.
|
N1102.2.4 (R402.2.4) Access hatches and doors. Access doors
from conditioned spaces to unconditioned spaces such as attics and
crawl spaces shall be weatherstripped and insulated to a level equivalent
to the insulation on the surrounding surfaces. Access shall be provided
to all equipment that prevents damaging or compressing the insulation.
A wood-framed or equivalent baffle or retainer is required to be provided
when loose-fill insulation is installed, the purpose of which is to
prevent the loose-fill insulation from spilling into the living space
when the attic access is opened, and to provide the permanent means
of maintaining the installed R-value of the loose-fill insulation.
|
Exception: Vertical doors that provide access from the conditioned
to unconditioned spaces shall be permitted to meet the fenestration
requirements of Table R1102.1.2 based on the applicable climate zone
specified in Chapter 3.
|
N1102.4 (R402.4) Air leakage (Mandatory). The building thermal
envelope shall may be designed and constructed to limit air leakage
in accordance with the requirements of Sections R1102.4.1 through
R1102.4.4.
|
N1102.4.1 (R402.4.1) Building thermal envelope. The building
thermal envelope shall comply with Sections N1102.4.1.1 and N1102.4.1.2.
The sealing methods between dissimilar materials shall allow for differential
expansion and contraction.
|
N1102.4.1.1 (R402.4.1.1) Installation. The components of the
building thermal envelope as listed in Table N1102.4.1.1 shall be
installed in accordance with the manufacturer's instructions and the
criteria listed in Table N1102.4.1.1, as applicable to the method
of construction. Where required by the Building Official, an approved
third party shall inspect all components and verify compliance.
|
N1102.4.1.2 (R402.4.1.2) Testing. Any building or dwelling unit
shall may be tested and verified as having an air leakage rate of
not exceeding five (5) air changes per hour in Climate Zones 1 and
2, and three (3) air changes per hour in Climate Zones 3 through 8
Zone 4. Testing shall be conducted in accordance with ASTM E 779 or
ASTM E 1827 and reported at a pressure of two-tenths (0.2) inches
w.g. (50 Pascals). Where required by the Code Official, testing shall
be conducted by an approved third party. A written report of the results
of the test shall be signed by the party conducting the test and provided
to the Code Official. Testing shall be performed at any time after
creation of all penetrations of the building thermal envelope.
| |
During testing:
| |
1.
|
Exterior windows and doors, fireplace and stove doors shall
be closed, but not sealed, beyond the intended weatherstripping or
other infiltration control measures.
|
2.
|
Dampers including exhaust, intake, makeup air, backdraft and
flue dampers shall be closed, but not sealed beyond intended infiltration
control measures.
|
3.
|
Interior doors, if installed at the time of the test, shall
be open.
|
4.
|
Exterior doors for continuous ventilation systems and heat recovery
ventilators shall be closed and sealed.
|
5.
|
Heating and cooling systems, if installed at the time of the
test, shall be turned off.
|
6.
|
Supply and return registers, if installed at the time of the
test, shall be fully open.
|
Table N1102.4.1.1 (402.4.1.1)
| |||
---|---|---|---|
Air Barrier and Insulation Installation
| |||
Component
|
Air-Barrier Criteria
|
Insulation Installation Criteria
| |
General Requirements
|
A continuous air barrier shall be installed in the building
envelope. The exterior thermal envelope contains a continuous air
barrier. Breaks or joints in the air barrier shall be sealed.
|
Air permeable insulation shall not be used as a sealing material.
| |
Ceiling/attic
|
The air barrier in any dropped ceiling/soffit shall be aligned
with the insulation and any gaps in the air barrier sealed.
|
The insulation in any dropped ceiling/soffit shall be aligned
with the air barrier.
| |
Access openings, drop down stairs or knee wall doors to unconditioned
attic spaces shall be sealed.
| |||
Walls
|
The junction of the foundation and sill plate shall be sealed.
The junction of the top plate and the top of the exterior walls
shall be sealed.
|
Cavities within corners and headers of frame walls shall be
insulated by completely filling the cavity with a material having
a thermal resistance of R-3 per inch minimum.
| |
Knee walls shall be sealed.
|
Exterior thermal envelope insulation for framed walls shall
be installed in substantial contact and continuous alignment with
the air barrier.
| ||
Windows, skylights and doors
|
The space between window/door jambs and framing, and skylights
and framing shall be sealed.
| ||
Rim joists
|
Rim joists shall include the air barrier.
|
Rim joists shall be insulated.
| |
Floors (including above garage and cantilevered floors)
|
The air barrier shall be installed at any exposed edge of insulation.
|
Floor framing cavity insulation shall be installed to maintain
permanent contact with the underside of subfloor decking, or floor
framing cavity insulation shall be permitted to be in contact with
the top side of sheathing, or continuous insulation installed on the
underside of floor framing; and extends from the bottom to the top
of all perimeter floor framing members.
| |
Crawl space walls
|
Exposed earth in unvented crawl spaces shall be covered with
Class I vapor retarder with overlapping joists taped.
|
Where provided instead of floor insulation, insulation shall
be permanently attached to the crawl space walls.
| |
Shafts, penetrations
|
Duct shafts, utility penetrations, and flue shafts opening to
exterior or unconditioned space shall be sealed.
| ||
Narrow cavities
|
Batts in narrow cavities shall be cut to fit, or narrow cavities
shall be filled by insulation that on installation readily conforms
to the available cavity space.
| ||
Garage separation
|
Air sealing shall be provided between the garage and conditioned
spaces.
| ||
Recessed lighting
|
Recessed light fixtures installed in the building thermal envelope
shall be sealed to the drywall.
|
Recessed light fixtures installed in the building thermal envelope
shall be air tight and IC rated.
| |
Plumbing and wiring
|
Batt insulation shall be cut neatly to fit around wiring and
plumbing in exterior walls, or insulation that on installation readily
conforms to available space shall extend behind piping and wiring.
| ||
Shower/tub on exterior wall
|
The air barrier installed at exterior walls adjacent to showers
and tubs shall separate them from showers and tubs.
|
Exterior walls adjacent to showers and tubs shall be insulated.
| |
Electrical/phone box on exterior walls
|
The air barrier shall be installed behind electrical or communication
boxes or air sealed boxes shall be installed.
| ||
HVAC register boots
|
HVAC register boots that penetrate building thermal envelope
shall be sealed to the subfloor or drywall.
| ||
Concealed sprinklers
|
When required to be sealed, concealed fire sprinklers shall
only be sealed in a manner that is recommended by the manufacturer.
Caulking or other adhesive sealants shall not be used to fill voids
between fire sprinkler cover plates and walls or ceilings.
|
a.
|
In addition, inspection of log walls shall be in accordance
with the provisions of ICC 400.
|
N1102.4.4 (R402.4.4) Rooms containing fuel-burning appliances.
In Climate Zones 3 through 8, where open combustion air ducts provide
combustion air to open combustion fuel-burning appliances, the appliances
and combustion air opening shall be located outside the building thermal
envelope or enclosed in a room, isolated from inside the thermal envelope.
Such rooms shall be sealed and insulated in accordance with the envelope
requirements of Table N1102.1.2, where the walls, floors and ceilings
shall meet a minimum of the basement wall R-value requirement. The
door into the room shall be fully gasketed and any water lines and
ducts in the room insulated in accordance with Section N1103. The
combustion air duct shall be insulated where it passes through conditioned
space to a minimum of R-8.
| |
Exceptions:
| |
1.
|
Direct vent appliances with both intake and exhaust pipes installed
continuous to the outside.
|
2.
|
Fireplaces and stoves complying with Sections N1102.4.2 and
R1006.
|
3.
|
Mechanical equipment in an unfinished space.
|
N1102.4.5 (R402.4.5) Recessed lighting. Recessed luminaires
installed in the building thermal envelope shall may be sealed to
limit air leakage between conditioned and unconditioned spaces. All
recessed luminaires shall may be IC-rated and labeled as having an
air leakage rate not more than 2.0 cfm (0.944 L/s) when tested in
accordance with ASTM E 283 at a 1.57 psf (75 Pa) pressure differential.
All recessed luminaires shall may be sealed with a gasket or caulk
between the housing and interior wall or ceiling covering.
|
N1103.1.1 (R403.1.1) Programmable thermostat. The thermostat
controlling the primary heating or cooling system of the dwelling
unit shall be capable of controlling the heating and cooling system
on a daily schedule to maintain different temperature set points at
different times of the day. This thermostat shall include the capability
to set back or temporarily operate the system to maintain zone temperatures
down to fifty-five degrees Fahrenheit (55° F.) (13° C.) or
up to eighty-five degrees Fahrenheit (85° F.) (29° C.). The
thermostat shall initially be programmed by the manufacturer with
a heating temperature set point no higher than seventy degrees Fahrenheit
(70° F.) (21° C.) and a cooling temperature set point no lower
than seventy-eight degrees Fahrenheit (78° F.) (26° C.).
|
N1103.3.3 (R403.3.3) Duct testing (Mandatory). Ducts shall be
pressure tested to determine air leakage by one (1) of the following
methods:
| |
1.
|
Rough in test: Total leakage shall be measured with a pressure
differential of one-tenths (0.1) inch w.g. (25 Pa) across the system,
including the manufacturer's air handler enclosure if installed at
the time of the test. All registers shall be taped or otherwise sealed
during the test.
|
2.
|
Postconstruction test: Total leakage shall be measured with
a pressure differential of one-tenth (0.1) inch w.g. (25 Pa) across
the entire system, including the manufacturer's air handler enclosure.
Registers shall be taped or otherwise sealed during the test.
|
Exception: A duct air leakage test shall not be required where
ducts and air handlers are located entirely within the building thermal
envelope.
| |
A written report of the results of the test shall be signed
by the party conducting the test and provided to the code official.
|
N1103.3.5 (R403.3.5) Building cavities (Mandatory). Building
framing cavities shall not be used as ducts or plenums.
|
N1103.4.1 (R403.4.1) Protection of piping insulation. Piping
insulation exposed to weather shall be protected from damage, including
that caused by sunlight, moisture, equipment maintenance and wind,
and shall provide shielding from solar radiation that can cause degradation
of the material. Adhesive tape shall not be permitted.
|
N1103.6 (R403.6) Mechanical ventilation (Mandatory). The building
shall be provided with ventilation that meets the requirements of
Section M1507 of this code or the International Mechanical Code, as
applicable, or with other approved means of ventilation. Outdoor air
intakes and exhausts shall have automatic or gravity dampers that
close when the ventilation system is not operating.
|
N1103.6.1 (R403.6.1) Whole house mechanical ventilation system
fan efficacy. Mechanical ventilation system fans shall meet the efficacy
requirements of Table N1103.6.1.
|
Exception: Where mechanical ventilation fans are integral to
tested and listed HVAC equipment, they shall be powered by an electronically
commutated motor.
|
Table N1103.6.1 (R403.6.1)
| |||
---|---|---|---|
Mechanical Ventilation System Fan Efficacy
| |||
Fan Location
|
Air Flow Rate Minimum
(cfm)
|
Minimum Efficacy
(cfm/watt)
|
Air Flow Rate Maximum
(cfm)
|
Range hoods
|
Any
|
2.8 cfm/watt
|
Any
|
In-line fan
|
Any
|
2.8 cfm/watt
|
Any
|
Bathroom, utility room
|
10
|
1.4 cfm/watt
|
<90
|
Bathroom, utility room
|
90
|
2.8 cfm/watt
|
Any
|
For SI: one cubic foot per minute = 28.3 L/min.
|
N1103.7 (R403.7) Equipment sizing and efficiency rating (Mandatory).
Heating and cooling equipment shall be sized in accordance with ACCA
Manual S based on building loads calculated in accordance with ACCA
Manual J or other approved heating and cooling calculation methodologies.
New or replacement heating and cooling equipment shall have an efficiency
rating equal to or greater than the minimum required by Federal law
for the geographic location where the equipment is installed.
|
N1104 (R404) Electrical Power and Lighting Systems (Mandatory)
|
N1104.1 (R404.1) Lighting equipment (Mandatory). Not less than
seventy-five percent (75%) of the lamps in permanently installed lighting
fixtures shall be high efficacy lamps or not less than seventy-five
percent (75%) of the permanently installed lighting fixtures shall
contain only high efficacy lamps.
|
Exception: Low voltage lighting.
|
N1104.1.1 (R404.1.1) Lighting equipment (Mandatory). Fuel gas
lighting systems shall not have continuously burning pilot lights.
|
Table N1105.5.2(1) [R405.5.2(1)]
| ||
---|---|---|
Specifications for the Standard Reference and Proposed Designs
| ||
Building Component
|
Standard Reference Design
|
Proposed Design
|
Above-grade walls
|
Type: mass wall if proposed wall is mass; otherwise wood frame
|
As proposed
|
Gross area: same as proposed
|
As proposed
| |
U-factor: as specified in Table N1102.1.4
|
As proposed
| |
Solar absorptance = 0.75
|
As proposed
| |
Remittance = 0.90
|
As proposed
| |
Basement and crawl space walls
|
Type: same as proposed
|
As proposed
|
Gross area: same as proposed
|
As proposed
| |
U-factor: from Table N1102.1.4, with insulation layer on interior
side of walls
|
As proposed
| |
Above-grade floors
|
Type: wood frame
|
As proposed
|
Gross area: same as proposed
|
As proposed
| |
U-factor: as specified in Table N1102.1.4
|
As proposed
| |
Ceilings
|
Type: wood frame
|
As proposed
|
Gross area: same as proposed
|
As proposed
| |
U-factor: as specified in Table N1102.1.4
|
As proposed
| |
Roofs
|
Type: composition shingle on wood sheathing
|
As proposed
|
Gross area: same as proposed
|
As proposed
| |
Solar absorptance = 0.75
|
As proposed
| |
Emittance = 0.90
|
As proposed
| |
Attics
|
Type: vented with aperture = 1 ft2 per 300 ft2 ceiling area
|
As proposed
|
Foundations
|
Type: same as proposed
|
As proposed
|
Foundation wall area above and below grade and soil characteristics:
same as proposed
|
As proposed
| |
Opaque doors
|
Area: 40 ft2
|
As proposed
|
Orientation: North
|
As proposed
| |
U-factor: same as fenestration from Table N1102.1.4
|
As proposed
| |
Vertical fenestration other than opaque doors
|
Total areab =
|
As proposed
|
a) The proposed glazing area, where the proposed glazing area
is less than fifteen percent (15%) of the conditioned floor area
| ||
b) Fifteen percent (15%) of the conditioned floor area, where
the proposed glazing area is fifteen percent (15%) or more of the
conditioned floor area
| ||
Orientation: equally distributed to four cardinal compass orientations
(N, E, S and W)
|
As proposed
| |
U-factor: as specified in Table N1102.1.4
|
As proposed
| |
SHGC: as specified in Table N1102.1.2 except that for climates
with no requirement (NR) SHGC = 0.40 shall be used
|
As proposed
| |
Interior shade fraction: 0.92 - (0.21 x SHGC for the standard
reference design)
|
0.92 - (0.21 x SHGC as proposed)
| |
External shading: none
|
As proposed
| |
Skylights
|
None
|
As proposed
|
Thermally isolated sunrooms
|
None
|
As proposed
|
Air exchange rate
|
Air leakage rate of 5 air changes per hour in Climate Zone 4
1 and 2, and 3 air changes per hour in Climate Zones 3 through 8 at
a pressure of two tenths (0.2) inches w.g. (50 Pa). The mechanical
ventilation rate shall be in addition to the air leakage rate and
the same as in the proposed design, but no greater than 0.01 x CFA
+ 7.5 x (Nbr + 1)
|
For residences that are not tested, the same air leakage rate
as the standard reference design.
For tested residences, the measured air exchange ratea.
The mechanical ventilation rate
b shall be in addition to the air
leakage rate and shall be proposed.
|
where:
| ||
CFA = conditioned floor area
| ||
Nbr = number of bedrooms
| ||
Energy recovery shall not be assumed for mechanical ventilation
| ||
Mechanical ventilation
|
None, except where mechanical ventilation is specified by the
proposed design, in which case:
|
As proposed
|
Annual vent fan energy use:
| ||
kWh/yr = 0.03942 x CFA + 29.565 x (Nbr + 1)
| ||
where:
| ||
CFA = conditioned floor area
| ||
Nbr = number of bedrooms
| ||
Internal gains
|
IGain = 17,900 + 23.8 x CFA + 4104 x Nbr(Btu/day per dwelling unit)
|
Same as standard reference design.
|
Internal mass
|
An internal mass for furniture and contents of eight (8) pounds
per square foot of floor area
|
Same as standard reference design, plus any additional mass
specifically designed as a thermal storage elementc but not integral to the building envelope or structure.
|
Structural mass
|
For masonry floor slabs, 80% of floor area covered by R-2 carpet
and pad, and 20% of floor directly exposed to room air
|
As proposed
|
For masonry basement walls, as proposed, but with insulation
required by Table R402.1.4 located on the interior side of the walls
|
As proposed
| |
For other walls, for ceilings, floors, and interior walls, wood
frame construction
|
As proposed
| |
Heating systemsd, e
|
As proposed for other than electric heating without a heat pump,
where the proposed design utilizes electric heating without a heat
pump the standard reference design shall be an air source heat pump
meeting the requirements of Section C403 of the IECC Commercial Provisions.
|
As proposed
|
Fuel type: same as the proposed design Efficiencies:
| ||
Electric: air-source heat pump with prevailing
| ||
Federal minimum standards
| ||
Non-electric furnaces: natural gas furnace with prevailing Federal
minimum standards
| ||
Non-electric boilers: natural gas boiler with prevailing Federal
minimum standards
| ||
Capacity: sized in accordance with Section N1103.7
| ||
Cooling systemsd, f
|
As proposed
|
As proposed
|
Fuel type: electric Efficiency: in accordance with prevailing
Federal minimum standards
| ||
Capacity: sized in accordance with Section N1103.7
| ||
Service water heatingd, e, f
|
As proposed
|
As proposed Gal/day = 30 + (10 x N) Same as standard reference
|
Use: same as proposed design
| ||
Fuel type: same as proposed design
| ||
Efficiency: in accordance with prevailing Federal minimum standards
| ||
Use: gal/day = 30 + 10 x Nbr
| ||
Tank temperature: 120° F.
| ||
Thermal distribution systems
|
Duct insulation: from Section N1103.2.1
|
As tested or specified in Table R405.5.2(2) if not tested. Duct
insulation shall be as proposed.
|
A thermal distribution system efficiency (DSE) of 0.88 shall
be applied to both the heating and cooling system efficiencies for
all systems other than tested duct systems. For tested duct systems,
the leakage rate shall be 4 cfm (113.3 L/min) per 100 ft2 (9.29 m2) of conditioned
floor area at a pressure of differential of one tenth (0.1) inches
w.g. (25 Pa)
| ||
Thermostat
|
Type: Manual, cooling temperature setpoint = 75° F.;
|
Same as standard reference
|
Heating temperature setpoint = 72° F.
|
For SI: 1 square foot = 0.93 m2,
1 British thermal unit = 1055 J, 1 pound per square foot = 4.88 kg/m2, 1 gallon (US) = 3.785 L, ° C. = (° F.-32)/1.8,
1 degree = 0.79 rad
| |
a.
|
Where required by the Code Official, testing shall be conducted
by an approved party. Hourly calculations as specified in the ASHRAE
Handbook of Fundamentals, or the equivalent, shall be used to determine
the energy loads resulting from infiltration.
|
b.
|
The combined air exchange rate for infiltration and mechanical
ventilation shall be determined in accordance with Equation 43 of
2001 ASHRAE Handbook of Fundamentals, page 26.24, and the "Whole-house
Ventilation" provisions of 2001 ASHRAE Handbook of Fundamentals, page
26.19, for intermittent mechanical ventilation.
|
c.
|
"Thermal storage element" shall mean a component not part of
the floors, walls or ceilings that is part of a passive solar system,
and that provides thermal storage such as enclosed water columns,
rock beds, or phase-change containers. A thermal storage element must
be in the same room as fenestration that faces within fifteen degrees
(15°) (0.26 rad) of true south, or must be connected to such a
room with pipes or ducts that allow the element to be actively charged.
|
d.
|
For a proposed design with multiple heating, cooling or water
heating systems using different fuel types, the applicable standard
reference design system capacities and fuel types shall be weighted
in accordance with their respective loads as calculated by accepted
engineering practice for each equipment and fuel type present.
|
e.
|
For a proposed design without a proposed heating system, a heating
system with the prevailing Federal minimum efficiency shall be assumed
for both the standard reference design and proposed design.
|
f.
|
For a proposed design home without a proposed cooling system,
an electric air conditioner with the prevailing Federal minimum efficiency
shall be assumed for both the standard reference design and the proposed
design.
|
g.
|
For a proposed design with a non-storage-type water heater,
a forty-gallon storage-type water heater with the prevailing Federal
minimum energy factor for the same fuel as the predominant heating
fuel type shall be assumed. For the case of a proposed design without
a proposed water heater, a forty-gallon storage-type water heater
with the prevailing Federal minimum efficiency for the same fuel as
the predominant heating fuel type shall be assumed for both the proposed
design and standard reference design.
|
M1301.2 Identification. Each length of pipe and tubing and each
pipe fitting utilized in a mechanical system shall bear the identification
of the manufacturer.
|
M1301.3 Installation of materials. Materials shall be installed
in strict accordance with the standards under which the materials
are accepted and approved. In the absence of such installation procedures,
the manufacturer's instructions shall be followed. Where the requirements
of referenced standards or manufacturer's instructions do not conform
to minimum provisions of this code, the provisions of this code shall
apply.
|
M1301.4 Plastic pipe, fittings and components. Plastic pipe,
fittings and components shall be third-party certified as conforming
to NSF 14.
|
M1301.5 Third-party testing and certification. Piping, tubing
and fittings shall comply with the applicable referenced standards,
specifications and performance criteria of this code and shall be
identified in accordance with Section M1301.2. Piping, tubing and
fittings shall either be tested by an approved third-party testing
agency or certified by an approved third-party certification agency.
|
M1305.1.4.1 Ground clearance. Equipment and appliances supported
from the ground shall be level and firmly supported on a concrete
slab or other approved material extending not less than three (3)
two (2) inches (76 50.8 mm) above the adjoining ground. Such support
shall be in accordance with the manufacturer's installation instructions.
Appliances suspended from the floor shall have a clearance of not
less than six (6) inches (152 mm) from the ground.
|
M1305.1.4.3 Electrical requirements. A luminaire controlled
by a switch located at the required passageway opening and a receptacle
outlet shall be installed at or near the appliance location in accordance
with Chapter 39. Exposed lamps shall be protected from damage by location
or lamp guards.
|
Exception: Basements.
|
M1307.2 Anchorage of appliances. Appliances designed to be fixed
in position shall be fastened or anchored in an approved manner. In
Seismic Design Categories D0, D1 and D2, and in townhouses in Seismic Design
Category C, water heaters and thermal storage units shall be anchored
or strapped to resist horizontal displacement caused by earthquake
motion in accordance with one (1) of the following:
| |
1.
|
Anchorage and strapping shall be designed to resist a horizontal
force equal to one-third (1/3) of the operating weight of the water
heater storage tank, acting in any horizontal direction. Strapping
shall be at points within the upper one-third (1/3) and lower one-third
(1/3) of the appliance's vertical dimensions. At the lower point,
the strapping shall maintain a minimum distance of four (4) inches
(102 mm) above the controls.
|
2.
|
The anchorage strapping shall be in accordance with the appliance
manufacturer's recommendations.
|
M1401.3 Equipment and appliance sizing. Heating and cooling
equipment and appliances shall be sized in accordance with ACCA Manual
S or other approved sizing methodologies based on building loads calculated
in accordance with ACCA Manual J or other approved heating and cooling
calculation methodologies.
| |
Exception: Heating and cooling equipment and appliance sizing
shall not be limited to the capacities determined in accordance with
Manual S where either of the following conditions applies:
| |
1.
|
The specified equipment or appliance utilizes multistage technology
or variable refrigerant flow technology, and the loads calculated
in accordance with the approved heating and cooling calculation methodology
are within the range of the manufacturer's published capacities for
that equipment or appliance.
|
2.
|
The specified equipment or appliance manufacturer's published
capacities cannot satisfy both the total and sensible heat gains calculated
in accordance with the approved heating and cooling calculation methodology
and the next larger standard size unit is specified.
|
M1411.3.1 Auxiliary and secondary drain systems. In addition
to the requirements of Section M1411.3, a secondary drain or auxiliary
drain pan shall be required for each cooling or evaporator coil where
damage to any building components will occur as a result of overflow
from the equipment drain pan or stoppage in the condensate drain piping.
Such piping shall maintain a minimum horizontal slope in the direction
of discharge or not less than 1/8 unit vertical in 12 units horizontal
(one-percent slope). Drain piping shall be not less than three-quarter
(3/4) inch (19 mm) nominal pipe size. One (1) of the following methods
shall be used:
| |
1.
|
An auxiliary drain pan with a separate drain shall be installed
under the coils on which condensation will occur. The auxiliary pan
drain shall discharge to a conspicuous point of disposal to alert
occupants in the event of a stoppage of the primary drain. The pan
shall have a minimum depth of one and five-tenths (1.5) inches (38
mm), shall be not less than three (3) inches (76 mm) larger than the
unit or the coil dimensions in width and length and shall be constructed
of corrosion-resistant material. Galvanized sheet steel pans shall
have a minimum thickness of not less than two hundred thirty-six ten
thousandths (0.0236) inch (0.6010 mm) (No. 24 26 gauge). Non-metallic
pans shall have a minimum thickness of not less than six hundred twenty-five
ten thousandths (0.0625) inch (1.6 mm).
|
M1501.1 Outdoor discharge. The air removed by every mechanical
exhaust system shall be discharged to the outdoors in accordance with
Section M1506.2. Air shall not be exhausted into an attic, soffit,
ridge vent or crawl space.
|
Exception: Whole-house ventilation-type attic fans that discharge
into the attic space of dwelling units having private attics shall
be permitted.
|
M1502.4.1 Material and size. Exhaust ducts shall have a smooth
interior finish and be constructed of metal having a minimum thickness
of one hundred fifty-seven ten thousandths (0.0157) inch (0.3950 mm)
(No. 28 30 gauge). The duct shall be four (4) inches (102 mm) nominal
in diameter.
|
M1502.4.2 Duct installation. Exhaust ducts shall be supported
at intervals not to exceed twelve (12) feet (3,658 mm) and shall be
secured in place. The insert end of the duct shall extend into the
adjoining duct or fitting in the direction of airflow. Exhaust duct
joints shall be sealed in accordance with Section M1601.4.1 and shall
be mechanically fastened. Ducts shall not be joined with screws or
similar fasteners that protrude more than 1/8 inch (3.2 mm) into the
inside of the duct.
|
M1502.4.5.1 Specified length. The maximum length of the exhaust
duct shall be thirty-five (35) feet (10,688 mm) from the connection
to the transition duct from the dryer to the outlet terminal. Where
fittings are used, the maximum length of the exhaust duct shall be
reduced in accordance with Table M1502.4.5.1. The maximum length of
the exhaust duct does not include the transition duct.
|
Exception: The maximum developed length may be extended to fifty-five
(55) feet if clearly labeled cleanouts are provided within twelve
(12) inches of the second elbow, at every elbow thereafter, and at
least every fifteen (15) feet of developed length thereafter.
|
M1503.4 Makeup air required. Exhaust hood systems capable of
exhausting in excess of 400 six hundred (600) cubic feet per minute
(0.19 m3/s) shall be mechanically or naturally
provided with makeup air at a rate approximately equal to the exhaust
air rate. Such makeup air systems shall be equipped with not less
than one (1) damper. Each damper shall be a gravity damper or an electrically
operated damper that automatically opens when the exhaust system operates.
Dampers shall be accessible for inspection, service, repair and replacement
without removing permanent construction or any other ducts not connected
to the damper being inspected, serviced, repaired or replaced. Such
makeup air systems shall be equipped with a means of closure and shall
be automatically controlled to start and operate simultaneously with
the exhaust system.
|
M1506.3 Exhaust openings. Air exhaust openings shall terminate
not less than three (3) feet (914 mm) from property lines; three (3)
feet (914 mm) from operable and non-operable openings into the building
and ten (10) feet (3,048 mm) from mechanical air intakes except where
the opening is located three (3) feet (914 mm) above the air intake.
Openings shall comply with Sections R303.5.2 and R303.6.
|
M1601.1 Duct design. Duct systems serving heating, cooling and
ventilation equipment shall be installed in accordance with the provisions
of this Section, and ACCA Manual D the appliance manufacturer's installation
instructions or other approved methods.
|
M1601.1.1 Above-ground duct systems. Above-ground duct systems
shall conform to the following:
| |
1.
|
Equipment connected to duct systems shall be designed to limit
discharge air temperature to not greater than 250° F. (121°
C.).
|
2.
|
Factory-made ducts shall be listed and labeled in accordance
with UL 181 and installed in accordance with the manufacturer's instructions.
|
2.
|
Fibrous glass duct construction shall conform to the SMACNA
Fibrous Glass Duct Construction Standards or NAIMA Fibrous Glass Duct
Construction Standards.
|
3.
|
Field-fabricated and shop-fabricated metal and flexible duct
constructions shall conform to the SMACNA HVAC Duct Construction Standards
— Metal and Flexible except as allowed by Table M1601.1.1. Galvanized
steel shall conform to ASTM A 653.
|
4.
|
The use of gypsum products to construct return air ducts or
plenums is permitted, provided that the air temperature does not exceed
125° F. (52° C.) and exposed surfaces are not subject to condensation.
|
5.
|
Duct systems shall be constructed of materials having a flame
spread index of not greater than 200.
|
6.
|
Stud wall cavities and the spaces between solid floor joists
to be used as non-ducted air plenums shall comply with the following
conditions:
|
6.1.
|
These cavities or spaces shall not be used as a plenum for air
supply.
|
6.2.
|
These cavities or spaces shall not be a part of required fire-resistance-rated
assembly.
|
6.3.
|
Stud wall cavities shall not convey air from more than one floor
level.
|
6.4.
|
Stud wall cavities and joist-space plenums shall be isolated
from adjacent concealed spaces by tight-fitting fireblocking in accordance
with Section R602.8.
|
6.5.
|
Stud wall cavities in the outside walls of building envelope
assemblies shall not be utilized as air plenums.
|
Table M1601.1.1
| ||||
---|---|---|---|---|
Duct Construction Minimum Sheet Metal Thickness for Single Dwelling
Unitsa
| ||||
Round Duct Diameter
(inches)
|
Static Pressure
| |||
1/2-inch Water Gauge Thickness
(inches)
|
1-inch Water Gauge Thickness
(inches)
| |||
Galvanized
|
Aluminum
|
Galvanized
|
Aluminum
| |
<12
|
0.013
|
0.018
|
0.013
|
0.018
|
12 to 14
|
0.013
|
0.018
|
0.016
|
0.023
|
15 to 17
|
0.016
|
0.023
|
0.019
|
0.027
|
18
|
0.016
|
0.023
|
0.024
|
0.034
|
19 to 20
|
0.019
|
0.027
|
0.024
|
0.034
|
Rectangular Duct Dimension
(largest dimension)
|
Static Pressure
| |||
---|---|---|---|---|
1/2-inch Water Gauge Thickness
(inches)
|
1-inch Water Gauge Thickness
(inches)
| |||
Galvanized
|
Aluminum
|
Galvanized
|
Aluminum
| |
<8
|
0.013
|
0.018
|
0.013
|
0.018
|
9 to 10
|
0.013
|
0.018
|
0.016
|
0.023
|
11 to 12
|
0.016
|
0.023
|
0.019
|
0.027
|
13 to 16
|
0.019 0.016
|
0.027
|
0.019
|
0.027
|
17 to 18
|
0.019
|
0.027
|
0.024
|
0.034
|
19 to 20
|
0.024 0.019
|
0.034
|
0.024
|
0.034
|
For SI: 1 inch = 25.4 mm, 1 inch water gauge = 249 Pa.
|
M1601.4.1 Joints, seams and connections. Joints of duct systems
shall be made substantially airtight in an unconditioned area by means
of tapes, mastics, liquid sealants, gasketing or other approved closure
systems. Closure systems used with rigid fibrous glass ducts shall
comply with UL 181A and shall be marked 181A-P for pressure-sensitive
tape, 181A-M for mastic or 181A-H for heat-sensitive tape. Closure
systems used with flexible air ducts and flexible air connectors shall
comply with UL 181B and shall be marked 181B-FX for pressure-sensitive
tape or 181B-M for mastic. Duct connections to flanges of air distribution
system equipment or sheet metal fittings shall be mechanically fastened.
Mechanical fasteners for use with flexible non-metallic air ducts
shall comply with UL 181B and shall be marked 181B-C. Crimp joints
for round metal ducts shall have a contact lap of at least one and
one-half (1 1/2) means of at least three (3) sheet metal screws
or rivets equally spaced around the joint. Closure systems used to
seal metal ductwork shall be installed in accordance with the manufacturer's
installation instructions.
| |
Longitudinal and transverse joints, seams and connections in
metallic and nonmetallic ducts shall be constructed as specified in
SMACNA HVAC Duct Construction Standards Metal and Flexible and NAIMA
Fibrous Glass Duct Construction Standards. Joints, longitudinal and
transverse seams, and connections in ductwork shall be securely fastened
and sealed with welds, gaskets, mastics (adhesives), mastic plus embedded
fabric systems, liquid sealants or tapes. Tapes and mastics used to
seal fibrous glass ductwork shall be listed and labeled in accordance
with UL 181A and shall be marked "181A P" for pressure-sensitive tape,
"181A-M" for mastic or "181A-H" for heat sensitive tape.
| |
Tapes and mastic used to seal metallic and flexible air ducts
and flexible air connectors shall comply with UL 181B and shall be
marked "181B-FX" for pressure-sensitive tape or "181B-M" for mastic.
Duct connections to flanges of air distribution system equipment shall
be sealed and mechanically fastened. Mechanical fasteners for use
with flexible nonmetallic air ducts shall comply with UL 181B and
shall be marked 181B-C. Crimp joints for round metallic ducts shall
have a contact lap of not less than one (1) inch (25 mm) and shall
be mechanically fastened by means of not less than three (3) sheet
metal screws or rivets equally spaced around the joint.
| |
Closure systems used to seal all ductwork shall be installed
in accordance with the manufacturer's instructions.
| |
Exceptions:
| |
1.
|
Spray polyurethane foam shall be permitted to be applied without
additional joint seals.
|
2.
|
Where a duct connection is made that is partially inaccessible,
three (3) screws or rivets shall be equally spaced on the exposed
portion of the joint so as to prevent a hinge effect.
|
3.
|
For ducts having a static pressure classification of less than
two (2) inches of water column (500 Pa), additional closure systems
shall not be required for continuously welded joints and seams and
locking type joints and seams of other than snap lock and button-lock
types.
|
Continuously welded and locking-type longitudinal joints and
seams in ducts operating at static pressure less than two (2) inches
of water column (500 Pa) pressure classification shall not require
additional closure systems.
|
M1602.2 Return air openings. Return air openings for heating,
ventilation and air conditioning systems shall comply with all of
the following:
| |
1.
|
Openings shall not be located less than ten (10) feet (3,048
mm) measured in any direction from an open combustion chamber or draft
hood of another appliance located in the same room or space.
|
2.
|
The amount of return air taken from any room or space shall
be not greater than the flow rate of supply air delivered to such
room or space.
|
2.
|
Return and transfer openings shall be sized in accordance with
the appliance or equipment manufacturers' installation instructions,
Manual D or the design of the registered design professional.
|
3.
|
Return air shall not be taken from a closet, bathroom, toilet
room, kitchen, garage, mechanical room, boiler room, furnace room
or unconditioned attic.
|
Exceptions:
| |
1.
|
Taking return air from a kitchen is not prohibited where such
return air openings serve the kitchen only, and are located not less
than ten (10) feet (3,048 mm) from the cooking appliances.
|
2.
|
Dedicated forced-air systems serving only the garage shall not
be prohibited from obtaining return air from the garage.
|
3.
|
Taking return air from an unconditioned crawl space shall not
be accomplished through a direct connection to the return side of
a forced-air furnace. Transfer openings in the crawl space enclosure
shall not be prohibited.
|
4.
|
Return air from one dwelling unit shall not be discharged into
another dwelling unit.
|
G2408.4 (305.7) Clearances from grade. Equipment and appliances
installed at grade level shall be supported on a level concrete slab
or other approved material extending not less than two (2) inches
(76 50.8 mm) above adjoining grade or shall be suspended not less
than six (6) inches (152 mm) above adjoining grade. Such supports
shall be installed in accordance with the manufacturer's installation
instructions.
|
G2409.1 (308.1) Scope. This Section shall govern the reduction
in required clearances to combustible materials, including gypsum
board, and combustible assemblies for chimneys, vents, appliances,
devices and equipment. Clearance requirements for air-conditioning
equipment and central heating boilers and furnaces shall comply with
Sections G2409.3 and G2409.4.
|
G2412.9 (401.9) Identification. Each length of pipe and tubing
and each pipe fitting, utilized in a fuel gas system, shall bear the
identification of the manufacturer.
|
G2412.10 (401.10) Third-party testing and certification. Piping,
tubing and fittings shall comply with the applicable referenced standards,
specifications and performance criteria of this code and shall be
identified in accordance with Section G2412.9. Piping, tubing and
fittings shall either be tested by an approved third-party testing
agency or certified by an approved third-party certification agency.
|
G2415.3 (404.3) Prohibited locations. Piping shall not be installed
in or through a ducted supply, return or exhaust, or a clothes chute,
chimney or gas vent, dumbwaiter or elevator shaft. Piping installed
downstream of the point of delivery shall not extend through any townhouse
unit other than the unit served by such piping.
|
G2428.3.16 (504.3.20) Chimney and vent locations. Tables G2428.3(1),
G2428.3(2), G2428.3(3) and G2428.3(4) shall be used only for chimneys
and vents not exposed to the outdoors below the roof line. A Type
B vent or listed chimney lining system passing through an unused masonry
chimney flue shall not be considered to be exposed to the outdoors.
Where vents extend outdoors above the roof more than five (5) feet
(1,524 mm) higher than required by Figure G2427.6.3 and where vents
terminate in accordance with the Section G2427.6.3, Item 2, the outdoor
portion of the vent shall be enclosed as required by this Section
for vents not considered to be exposed to the outdoors or such venting
system shall be engineered. A Type B vent shall not be considered
to be exposed to the outdoors where it passes through an unventilated
enclosure or chase insulated to a value of not less than R8.
|
G2439.7.4.1 (614.8.4.1) Specified length. The maximum length
of the exhaust duct shall be thirty-five (35) feet (10,688 mm) from
the connection to the transition duct from the dryer to the outlet
terminal. Where fittings are used, the maximum length of the exhaust
duct shall be reduced in accordance with Table G2439.7.4.1. The maximum
length of the exhaust duct does not include the transition duct.
|
Exception: The maximum developed length may be extended to fifty-five
(55) feet if clearly labeled cleanouts are provided within twelve
(12) inches of the second elbow, at every elbow thereafter, and at
least every fifteen (15) feet of developed length thereafter.
|
G2442.4 (618.4) Prohibited sources. Outdoor or return air for
forced-air heating and cooling systems shall not be taken from the
following locations:
| |
1.
|
Closer than ten (10) feet (3,048 mm) from an appliance vent
outlet, a vent opening from a plumbing drainage system or the discharge
outlet of an exhaust fan, unless the outlet is three (3) feet (914
mm) above the outside air inlet.
|
2.
|
Where there is the presence of objectionable odors, fumes or
flammable vapors; or where located less than ten (10) feet (3,048
mm) above the surface of any abutting public way or driveway; or where
located at grade level by a sidewalk, street, alley or driveway.
|
3.
|
A hazardous or insanitary location or a refrigeration machinery
room as identified in the International Mechanical Code.
|
4.
|
A room or space, the volume of which is less than twenty-five
percent (25%) of the entire volume served by such system. Where connected
by a permanent opening having an area sized in accordance with Section
G2442.2, adjoining rooms or spaces shall be considered as a single
room or space for the purpose of determining the volume of such rooms
or spaces.
|
Exception: The minimum volume requirement shall not apply where
the amount of return air taken from a room or space is less than or
equal to the amount of supply air delivered to such room or space.
| |
5.
|
A room or space containing an appliance where such a room or
space serves as the sole source of return air.
|
Exception: This shall not apply where:
| |
1.
|
The appliance is a direct-vent appliance or an appliance not
requiring a vent in accordance with Section G2425.8.
|
2.
|
The room or space complies with the following requirements:
|
2.1.
|
The return air shall be taken from a room or space having a
volume exceeding one (1) cubic foot for each ten (10) Btu/h (9.6L/W)
of combined input rating of all fuel-burning appliances therein.
|
2.2.
|
The volume of supply air discharged back into the same space
shall be approximately equal to the volume of return air taken from
the space.
|
2.3.
|
Return-air inlets shall not be located within ten (10) feet
(3,048 mm) of a draft hood in the same room or space or the combustion
chamber of any atmospheric burner appliance in the same room or space.
|
3.
|
Rooms or spaces containing solid-fuel-burning appliances, provided
that return-air inlets are located not less than ten (10) feet (3,048
mm) from the firebox of such appliances.
|
6.
|
A closet, bathroom, toilet room, kitchen, garage, boiler room,
furnace room or unconditioned attic.
|
Exceptions:
| |
1.
|
Where return air intakes are located not less than ten (10)
feet (3,048 mm) from cooking appliances and serve only the kitchen
area, taking return air from a kitchen area shall not be prohibited.
|
2.
|
Dedicated forced air systems serving only a garage shall not
be prohibited from obtaining return air from the garage.
|
3.
|
Where a closet is provided with a supply register, taking return
air from the closet shall not be prohibited.
|
7.
|
A crawl space by means of direct connection to the return side
of a forced-air system. Transfer openings in the crawl space enclosure
shall not be prohibited.
|
P2503.5.1 Rough plumbing. DWV systems shall be tested on completion
of the rough piping installation by water or, for piping systems other
than plastic, by air without evidence of leakage. Either test shall
be applied to the drainage system in its entirety or in sections after
rough-in piping has been installed, as follows:
| |
1.
|
Water test. Each section shall be filled with water to a point
not less than five (5) feet (1,524 mm) above the highest fitting connection
in that section, or to the highest point in the completed system.
Water shall be held in the section under test for a period of fifteen
(15) minutes. The system shall prove leak free by visual inspection.
|
2.
|
Air test. The portion under test shall be maintained at a gauge
pressure of five (5) pounds per square inch (psi) (34 kPa) or ten
(10) inches of mercury column (34 kPa). This pressure shall be held
without introduction of additional air for a period of fifteen (15)
minutes.
|
P2603.4 Pipes through foundation walls. A pipe that passes through
a foundation wall shall be provided with a relieving arch, or a pipe
sleeve shall be built into the foundation wall. The sleeve shall be
two (2) pipe sizes greater than the pipe passing through the wall.
| |
1.
|
In Section P2603.5.1, insert "30" into the first [NUMBER].
|
2.
|
In Section P2603.5.1, insert "30" into the second [NUMBER].
|
P2690.1 Identification. Each length of pipe and each pipe fitting,
trap, fixture, material and device utilized in a plumbing system shall
bear the identification of the manufacturer and any markings required
by the applicable referenced standards. Nipples created from the cutting
and threading of approved pipe shall not be required to be identified.
|
Exception: Where the manufacturer identification cannot be marked
on pipe fittings and pipe nipples because of the small size of such
fittings, the identification shall be printed on the item packaging
or on documentation provided with the item.
|
P2609.2 Installation of materials. Materials used shall be installed
in strict accordance with the standards under which the materials
are accepted and approved. In the absence of such installation procedures,
the manufacturer's instructions shall be followed. Where the requirements
of referenced standards or manufacturer's instructions do not conform
to minimum provisions of this code, the provisions of this code shall
apply.
|
P2609.3 Plastic pipe, fittings and components. Plastic pipe,
fittings and components shall be third-party certified as conforming
to NSF 14.
|
P2609.4 Third-party certification. Plumbing products and materials
required by the code to be in compliance with a referenced standard
shall be listed by a third-party certification agency as complying
with the referenced standards. Products and materials shall be identified
in accordance with Section P2609.1.
|
P2706.3 Prohibited waste receptors. Plumbing fixtures that are
used for washing or bathing shall not be used to receive the discharge
of indirect waste piping.
| |
Exceptions:
| |
1.
|
A kitchen sink trap is acceptable for use as a receptor for
a dishwasher.
|
2.
|
A laundry tray is acceptable for use as a receptor for a clothes-washing
machine.
|
3.
|
A drain or waste pipe above a trap is acceptable for use as
a receptor for mechanical equipment condensate drains.
|
P2801.8 Water heater seismic bracing. In Seismic Design Categories
D0, D1 and D2 and townhouses in Seismic Design Category C, water
heaters shall be anchored or strapped in the upper one-third (1/3)
and in the lower one-third (1/3) of the appliance to resist a horizontal
force equal to one-third (1/3) of the operating weight of the water
heater, acting in any horizontal direction, or in accordance with
the appliance manufacturer's recommendations.
|
P2903.5 Water hammer. The flow velocity of the water distribution
system shall be controlled to reduce the possibility of water hammer.
A water-hammer arrestor shall be installed where quick-closing valves
are used. Water-hammer arrestors shall be installed in accordance
with the manufacturer's installation instructions. Water-hammer arrestors
shall conform to ASSE 1010.
|
P2904.1 General. When installed, the design and installation
of residential fire sprinkler systems shall be in accordance with
NFPA 13D or Section 2904, which shall be considered equivalent to
NFPA 13D. Partial residential sprinkler systems shall be permitted
to be installed only in buildings not required to be equipped with
a residential sprinkler system. Section P2904 shall apply to stand-alone
and multipurpose wet-pipe sprinkler systems that do not include the
use of antifreeze. A multipurpose fire sprinkler system shall provide
domestic water to both fire sprinklers and plumbing fixtures. A stand-alone
sprinkler system shall be separate and independent from the water
distribution system. A backflow preventer shall not be required to
separate a stand-alone system from the water distribution system.
|
R3201.2.1 Trap seal protection. Trap seals of emergency floor
drain traps and traps subject to evaporation shall be protected by
one (1) of the methods in Sections P3201.2.1.1 through P3201.2.1.4.
|
Exception: Basement floor drains with a condensate line draining
to it.
|
E3609.3 Bonding for other systems. An intersystem bonding termination
for connecting intersystem bonding conductors required for other systems
shall be provided external to enclosures at the service equipment
or metering equipment enclosure and at the disconnecting means for
any additional buildings or structures. The intersystem bonding termination
shall comply with the following:
| |
1.
|
It shall be accessible for connection and inspection.
|
2.
|
It shall consist of a set of terminals with the capacity for
connection of not less than three (3) intersystem bonding conductors.
|
3.
|
It shall not interfere with opening of the enclosure for a service,
building or structure disconnecting means, or metering equipment.
|
4.
|
Where located at the service equipment, it shall be securely
mounted and electrically connected to an enclosure for the service
equipment, to the meter enclosure, or to an exposed non-flexible metallic
service raceway, or shall be mounted at one (1) of these enclosures
and connected to the enclosure or to the grounding electrode conductor
with a 6 AWG or larger copper conductor.
|
5.
|
Where located at the disconnecting means for a building or structure,
it shall be securely mounted and electrically connected to the metallic
enclosure for the building or structure disconnecting means, or shall
be mounted at the disconnecting means and connected to the metallic
enclosure or to the grounding electrode conductor with a 6 AWG or
larger copper conductor.
|
6.
|
It shall be listed as grounding and bonding equipment. (250.94).
|
E3701.5.1 Disconnecting means. Each multiwire branch circuit
shall may be provided with a means that will simultaneously disconnect
all ungrounded conductors at the point where the branch circuit originates.
[210.4(B)]
|
E3901.2.2 Wall Space. As used in this Section, a wall space
shall include the following.
| |
1.
|
Any space that is two (2) feet or more in width, including space
measured around corners, and that is unbroken along the floor line
by doorways and similar openings, fireplaces, and fixed cabinets.
|
2.
|
The space occupied by fixed panels in exterior walls, excluding
sliding panels.
|
3.
|
The space created by fixed room dividers such as railings and
freestanding bar type counters.
|
E3902.2 Garage and accessory building receptacles. 125-volt,
single-phase, 15- or 20-ampere receptacles installed in garage and
grade-level portions of unfinished accessory buildings used for storage
or wok areas shall have ground-fault circuit-interrupter protection
for personnel. [210.8(A)(2)]
|
Exception: Fastened-in-place appliances or outlets designated
for refrigerators/freezers.
|
E3902.5 Unfinished basement receptacles. 125-volt, single-phase,
15- and 20-ampere receptacles installed in unfinished basements shall
have ground-fault circuit-interrupter protection for personnel. For
purposes of this Section, unfinished basements are defined as portions
or areas of the basement not intended as habitable rooms and limited
to storage areas, work areas, and similar areas. [210.8(A)(5)]
| |
Exceptions:
| |
1.
|
A receptacle supplying only a permanently installed fire alarm
or burglar alarm system. Receptacles installed in accordance with
this exception shall not be considered as meeting the requirements
of Section E3901.9.
|
2.
|
Fastened-in-place appliances or outlets designated for refrigerators/freezers.
|
E3902.6 Kitchen receptacles. 125-volt, single-phase, 15- and
20-ampere receptacles that serve countertop surfaces shall have ground-fault
circuit-interrupter protection for personnel. [210.8(A)(6)]
|
Exception: Fastened-in-place appliances or outlets designated
for refrigerators/freezers.
|
E3902.9 Laundry areas. 125 volt, single-phase, 15- and 20-ampere
receptacles installed in laundry areas shall have ground-fault circuit-interrupter
protection for personnel. [210.8(A)(9)]
|
E3902.10 Kitchen dishwasher branch circuit. Ground-fault circuit-interrupter
protection shall be provided for outlets that supply dishwashers in
dwelling unit locations. [210.8(D)]
|
E3902.14 Location of ground-fault circuit interrupters. Ground-fault
circuit interrupters shall be installed only in a readily accessible
location. [210.8(A)]
|
E3902.16 Arc-fault circuit-interrupter protection. Branch circuits
that supply 120-volt, single-phase, 15- and 20-ampere outlets installed
in kitchens, family rooms, dining rooms, living rooms, parlors, libraries,
dens, bedrooms, sunrooms, recreation rooms, closets, hallways, laundry
areas and similar rooms or areas shall be protected by any of following:
[120.12(a)]
| |
1.
|
A listed combination-type arc fault circuit interrupter, installed
to provide protection of the entire branch circuit. [210.12(A)(1)]
|
2.
|
A listed branch/feeder type AFCI installed at the origin of
the branch circuit in combination with a listed outlet-branch-circuit-type
arc fault circuit interrupter installed at the first outlet box on
the branch circuit. The first outlet box in the branch circuit shall
be marked to indicate that it is the first outlet of the circuit.
[210.12(A)(2)]
|
3.
|
A listed supplemental arc protection circuit breaker installed
at the origin of the branch circuit in combination with a listed outlet-branch-circuit-type
are fault circuit interrupter installed at the first outlet box on
the branch circuit where all of the following conditions are met:
|
3.1.
|
The branch circuit wiring shall be continuous from the branch
circuit overcurrent device to the outlet-branch-circuit arc fault
circuit interrupter.
|
3.2.
|
The maximum length of the branch circuit wiring from the branch
circuit overcurrent device to the first outlet shall not exceed fifty
(50) feet (15.2 m) for 14 AWG conductors and seventy (70) feet (21.3
m) for 12 AWG conductors.
|
3.3.
|
The first outlet box in the branch circuit shall be marked to
indicate that it is the first outlet of the circuit. [210.12(A)(3)]
|
4.
|
A listed outlet-branch-circuit-type arc fault circuit interrupter
installed at the first outlet on the branch circuit in combination
with a listed branch circuit overcurrent protective device where all
of the following conditions are met:
|
4.1.
|
The branch circuit wiring shall be continuous from the branch
circuit overcurrent device to the outlet-branch-circuit arc fault
circuit interrupter.
|
4.2.
|
The maximum length of the branch circuit wiring from the branch
circuit overcurrent device to the first outlet shall not exceed fifty
(50) feet (15.2 m) for 14 AWG conductors and seventy (70) feet (21.3
m) for 12 AWG conductors.
|
4.3.
|
The first outlet box in the branch circuit shall be marked to
indicate that it is the first outlet on the circuit.
|
4.4.
|
The combination of the branch circuit overcurrent device and
outlet branch circuit AFCI shall be identified as meeting the requirements
for a system combination type AFCI and shall be listed as such. [210.12(A)(4)]
|
5.
|
Where metal outlet boxes and junction boxes and RMC, IMC, EMT,
Type MC or steel armored Types AC cables meeting the requirements
of Section E3908.8, metal wireways or metal auxiliary gutters are
installed for the portion of the branch circuit between the branch
circuit overcurrent device and the first outlet, a listed outlet branch
circuit type AFCI installed at the first outlet shall be considered
as providing protection for the remaining portion of the branch circuit.
[210.12(A)(5)]
|
6.
|
Where a listed metal or nonmetallic conduit or tubing or Type
MC cable is encased in not less than two (2) inches (50.8 mm) of concrete
for the portion of the branch circuit between the branch circuit overcurrent
device and the first outlet, a listed outlet branch circuit type AFCI
installed at the first outlet shall be considered as providing protection
for the remaining portion of the branch circuit. [210.12(A)(6)]
|
Exception: AFCI protection is not required for an individual
branch circuit supplying only a fire alarm system where the branch
circuit is wired with metal outlet and junction boxes and RMC, IMC,
EMT or steel sheathed armored cable Type AC or Type MC meeting the
requirements of Section E3908.8.
|
E3902.17 Arc-fault circuit interrupter protection for branch
circuit extensions or modifications. Where branch circuit wiring is
modified, replaced, or extended in any of the areas specified in Section
E3902.16, the branch circuit shall be protected by one (1) of the
following:
| |
1.
|
A combination-type AFCI located at the origin of the branch
circuit.
|
2.
|
An outlet branch circuit type AFCI located at the first receptacle
outlet of the existing branch circuit. [210.12(B)]
|
Exception: AFCI protection shall not be required where the extension
of the existing conductors is not more than six (6) feet (1.8 m) thirty
(30) feet (9.5 m) in length and does not include any additional outlets
or devices. [210.12(B) Exception]
|
E4002.14 Tamper resistant receptacles. In areas specified in
Section E3901.1, 125-volt, 15- and 20-ampere receptacles shall be
listed tamper-resistant receptacles. [406.12(A)]
| |
Exception: Receptacles in the following locations shall not
be required to be tamper-resistant.
| |
1.
|
Receptacles located more than five and five tenths (5.5) feet
(1,676 mm) above the floor.
|
2.
|
Receptacles that are part of a luminaire or appliance.
|
3.
|
A single receptacle for a single appliance or a duplex receptacle
for two (2) appliances where such receptacles are located in spaces
dedicated for the appliances served and, under conditions of normal
use, the appliances are not easily moved from one place to another.
The appliances shall be cord-and-plug-connected to such receptacles
in accordance with Section E3909.4. [406.12(A) Exception]
|