Minimum Width of Concrete, Precast, or Masonry Footings (inches)
for Light-Frame Construction with Pre-Fabricated Roof Trussesa,b
| ||||
---|---|---|---|---|
Table R403.1(4)
| ||||
Load-Bearing Value of Soil (psf)
| ||||
1500
|
2000
|
3000
|
>4000
| |
Conventional light-frame construction with pre-fabricated trusses
| ||||
1 story
|
12
|
12
|
12
|
12
|
2 story
|
15
|
12
|
12
|
12
|
3 story
|
23
|
17
|
12
|
12
|
4-inch brick veneer over light frame or 8-inch hollow concrete
masonry
| ||||
1 story
|
12
|
12
|
12
|
12
|
2 story
|
21
|
16
|
12
|
12
|
3 story
|
32
|
24
|
16
|
12
|
8-inch solid or fully grouted masonry
| ||||
1 story
|
16
|
12
|
12
|
12
|
2 story
|
29
|
21
|
14
|
12
|
3 story
|
42
|
32
|
21
|
16
|
For SI: 1 inch = 25.4 mm, 1 pound per square foot = 0.0479 kPa
| |
a.
|
Where minimum footing width is twelve (12) inches, use of a
single wythe of solid or fully grouted 12-inch nominal concrete masonry
units is permitted.
|
b.
|
Snow Load or Roof Live Load shall not exceed twenty (20) psf.
If load exceeds twenty (20) psf, designs must be completed by a licensed
design professional.
|
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 structural engineer
licensed by the State of Missouri.
|
R404.1.3.2 Reinforcement for foundation walls. Concrete foundation
walls shall be laterally supported at the top and bottom. Horizontal
reinforcement shall be provided in accordance with Table R404.1.2(1).
Vertical reinforcement shall be provided in accordance with Table
R404.1.2(2), R404.1.2(3), R404.1.2(4), R404.1.2(5), 404.1.2(6), R404.1.2(7)
or R404.1.2(8). Vertical reinforcement for flat basement walls retaining
four (4) feet (1,219 mm) or more of unbalanced backfill is permitted
to be determined in accordance with Table R404.1.2(9). For basement
walls supporting above-grade concrete walls, vertical reinforcement
shall be the greater of that required by Tables R404.1.2(2) through
R404.1.2(8) or by Section R608.6 for the above-grade wall. In buildings
assigned to Seismic Design Category D0, D1 or D2, concrete foundation walls
shall also comply with Section R404.1.4.2.
|
Exception: Where a licensed Missouri engineer's geotechnical
report confirms that unstable soil or ground water conditions do not
exist on an individual home site, concrete foundation walls may be
constructed in accordance with Table R404.1.2(10).
|
Table R404.1.2(10) Concrete Foundation Walls
| ||
---|---|---|
Maximum Wall Height
|
Maximum Depth of Unbalanced Backfill
|
Minimum Nominal Wall Thickness
|
8'-0"
|
7'-6" or less
|
8" (Note a)
|
9'-0"
|
8'-6" or less
|
10" (Note b)
|
10'0"
|
9'-6" or less
|
12" (Note c)
|
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 (2) #4 reinforcing bars shall be placed horizontally
in the top and bottom of the foundation wall. A minimum of two (2)
#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 (2) #5 reinforcing
bars shall be placed horizontally in the top, middle, and bottom of
the foundation wall. A minimum of two (2) #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 c: Concrete foundation walls may be constructed a minimum
of nominal twelve (12) inches thick. A minimum of three (3) #5 reinforcing
bars shall be placed horizontally in the top, middle, and bottom of
the foundation wall. A minimum of two (2) #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 d: The concrete minimum wall thickness shall be eight (8)
inches for foundation walls in soil classes SC, MH, ML-CL and inorganic
CL when maximum wall height is eight (8) feet.
|
Note e: 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.
|
Note f: 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 foundation that retain earth and enclose
habitable or usable spaces located below grade. Drainages 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 by a geotechnical
engineer 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 (eighteen
(18) inches in diameter x twenty-four (24) 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.
|
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 x 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 Wallsa
| ||
Maximum Header Span
(feet)
|
Ultimate Design Wind Speed and Exposure Category
| |
<140 mph, Exposure B or
<130 mph, Exposure C
|
<115mph, Exposure Bb
| |
4
|
1
|
1
|
6
|
2
|
1
|
8
|
2
|
1
|
10
|
3
|
2
|
12
|
3
|
2
|
14
|
3
|
2
|
16
|
4
|
2
|
18
|
4
|
2
|
a.
|
For header spans between those given above, use the minimum
number of full-height studs associated with the larger header span.
The tabulated minimum number of full-height studs is applicable where
jack studs are provided to support the header at each end in accordance
with Table R602.7.(1). Where a framing anchor is used to support the
header in lieu of a jack stud in accordance with footnote "d" of Table
R602.7.(1), the minimum number of full-height studs at each end of
a header shall be in accordance with requirements for wind speed <140mph,
Exposure B.
|
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 D3909 or ASTM D6380 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 two (2) ply of No. 15 felt complying with ASTM D226 Type I, ASTM
D4869 Type I, or ASTM D6757 and not less than thirty six (36) inches
wide (914 mm) or valley lining as described in Item 1 and 2 shall
be permitted. Self-adhering polymer modified bitumen underlayment
complying with ASTM D1970 shall be permitted in lieu of the lining
material.
|
R905.2.8.5 Drip Edge. A drip edge, or equivalent approved by
the jurisdiction, 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 fourths (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: Chimneys 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 approved by the jurisdiction, and shall
be installed according to the fireplace manufacturer's instructions.
|
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. Applicant must provide adequate information to the
Lake Saint Louis Building Official to demonstrate that the above code
program satisfies all necessary code requirements.
|
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.
|
Table N1102.1.2 (R402.1.2)
| ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
Insulation and Fenestration Requirements by Componenta
| ||||||||||
Climate Zone
|
Fenes- tration U-Factorb
|
Skylightb U-Factor
|
Glazed Fenes- tration SHGCb e
|
Ceiling R-Value
|
Wood Frame Wall R-Value
|
Mass Wall R-Valuei
|
Floor R-Value
|
Base- mentc Wall R-Value
|
Slabd R-Value & Depth
|
Crawl 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
|
5/13f
|
0
|
5/13
|
4 except Marine
|
0.40
|
0.55
|
NR
|
38
|
5h 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
|
30g
|
15/19
|
10, 2 ft
|
15/19
|
6
|
0.32
|
0.55
|
NR
|
49
|
20 + 5 or 13 + 10h
|
15/20
|
30g
|
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
|
F or SI: 1 foot = 304.8mm.
| |
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 [.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 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.
Jurisdiction will require a separate sealed submission for each proposed
home to use shaded vertical fenestration. 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 (+/- 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
|
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 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. The building thermal envelope
may be designed and constructed to limit air leakage in accordance
with the requirements of Sections R1102.4.1 through R1102.4.4.
|
N1102.4.1.2 (R402.4.1.2) Testing Option. If testing is elected,
the building or dwelling unit shall be tested and verified as having
an air leakage rate of not exceeding five (5) air changes per hour
in Climate Zone 4. Testing shall be conducted in accordance with ASTM
E779 or ASTM E1827 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.
Access openings, drop down stairs or knee wall doors to unconditioned
attic spaces shall be sealed.
|
The insulation in any dropped ceiling/soffit shall be aligned
with the air barrier.
|
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.
Knee 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.
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.
|
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.
| |
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.
| |
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.
|
N1102.4.5 (R402.4.5) Recessed lighting. Recessed luminaires
installed in the building thermal envelope may be sealed to limit
air leakage between conditioned and unconditioned spaces. All recessed
luminaires 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
E283 at a 1.57 psf (75 Pa) pressure differential. All recessed luminaires
may be sealed with a gasket or caulk between the housing and interior
wall or ceiling covering.
| |
N1103.3.2 (R403.3.2) Sealing. Ducts, air handlers and filter
boxes shall be sealed. Joints and seams shall comply with either the
International Mechanical Code or Section M1601.4.1 of this code, as
applicable.
| |
Exceptions:
| |
1.
|
Air-impermeable spray foam products shall be permitted to be
applied without additional joint seals.
|
2.
|
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.
|
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 which otherwise meets the requirements
of this Section shall be permitted.
|
N1103.5.3 (R405.5.3) Hot water pipe insulation (Prescriptive).
Insulation for hot water pipe with a minimum thermal resistance (R-value)
of R-3 shall be applied to the following:
| |
1.
|
Metallic piping larger than or equal to three fourths (3/4)
inch (19 mm) in nominal diameter.
|
2.
|
Piping serving more than one (1) dwelling unit.
|
3.
|
Piping located outside the conditioned space.
|
4.
|
Piping from the water heater to a distribution manifold.
|
5.
|
Piping located under a floor slab.
|
6.
|
Buried in piping.
|
7.
|
Supply and return piping in recirculation systems other than
demand recirculation systems.
|
N1103.6 (R403.6) Mechanical ventilation. If, in accordance with
previous code sections or as part of an above code program, the resulting
air changes per hour (ACH) at 50 Pascals is three (3) air changes
or less, 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.
|
N1103.7 (R403.7) Equipment sizing and efficiency rating (mandatory).
Heating and cooling equipment shall be sized 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.
|
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 =
| ||
a)
|
15% of the conditioned floor area.
|
As proposed
| |
Orientation: equally distributed to four cardinal compass orientations
(N, E, S & 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 Zones
4. 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)
where:
CFA = conditioned floor area
Nbr = number of bedrooms
Energy recovery shall not be assumed for mechanical ventilation
Air leakage rate of 5 air changes per hour in at a pressure
of 0.2
where:
co ventilation
|
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 rateb shall
be in addition to the air leakage rate and shall be proposed.
| |
Mechanical ventilation
|
None, except where mechanical ventilation is specified by the
proposed design, in which case:
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
|
As proposed
| |
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 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
|
Fuel type: same as the proposed design
|
As proposed
| |
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
|
Fuel type: electric
|
As proposed
| |
Efficiency: in accordance with prevailing Federal minimum standards
| |||
Capacity: sized in accordance with Section N1103.7
| |||
Service water heatingd, e, f
|
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.
|
As proposed
Same as standard reference
| |
Thermal distribution systems
|
Duct insulation: from Section N1103.2.1
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 tenths (0.1) inches
w.g. (25 Pa)
|
As tested or specified in Table R405.5.2(2) if not tested. Duct
insulation shall be as proposed.
| |
Thermostat
|
Type: Manual, cooling temperature setpoint = 75° F.;
Heating temperature setpoint = 72° F.
|
Same as standard reference
|
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° = 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°) (twenty-six hundredths (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 40-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 40-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.
|
Exception: Line sets and similar materials provided the installer
can provide documentation related to the material used such as, but
not limited to, a receipt, invoice, or container.
|
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 two (2) inches
(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
|
M1401.3 Equipment and appliance sizing. Heating and cooling
equipment and appliances shall be sized 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 one-eighth (1/8) unit vertical in twelve
(12) units horizontal (one percent (1%) slope). Drain piping shall
be not less than three fourths (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 (No. 26 Gage). Non-metallic
pans shall have a minimum thickness of not less than 0.0625 inch (1.6
mm).
|
M1502.4.1 Material and size. Exhaust ducts shall have a smooth
interior finish and be constructed of metal having a minimum thickness
of 0.0157 inch (0.3950 mm) (No. 30 gage). 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 or fastened by other methods as approved
by the authority having jurisdiction. Ducts shall not be joined with
screws or similar fasteners that protrude more than one-eighth (1/8)
inch (3.2 mm) into the inside of the duct.
|
M1503.4 Makeup air required. Exhaust hood systems capable of
exhausting in excess of four hundred (400) 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.
|
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.
| |
3.
|
Fibrous glass duct construction shall conform to the SMACNA
Fibrous Glass Duct Construction Standards or NAIMA Fibrous Glass Duct
Construction Standards.
| |
4.
|
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 A653.
| |
5.
|
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.
| |
6.
|
Duct systems shall be constructed of materials having a flame
spread index of not greater than two hundred (200).
| |
7.
|
Stud wall cavities and the spaces between solid floor joists
to be used as non-ducted air plenums shall comply with the following
conditions:
| |
7.1.
|
These cavities or spaces shall not be used as a plenum for air
supply.
| |
7.2.
|
These cavities or spaces shall not be a part of required fire-resistance-rated
assembly.
| |
7.3.
|
Stud wall cavities shall not convey air from more than one (1)
floor level.
| |
7.4.
|
Stud wall cavities and joist-space plenums shall be isolated
from adjacent concealed spaces by tight-fitting fireblocking in accordance
with Section R602.8.
| |
7.5.
|
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
| ||||||
Static Pressure
| ||||||
Round Duct Diameter
(inches)
|
1/2 inch water gage
|
1 inch water gage
| ||||
Thickness (inches)
|
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 gage
|
1 inch water gage
| |||||
Thickness
(inches)
|
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
|
0.016
|
0.027
|
0.019
|
0.027
| ||
17 to 18
|
0.019
|
0.027
|
0.024
|
0.034
| ||
19 to 20
|
0.019
|
0.034
|
0.024
|
0.034
| ||
For SI: 1 inch = 25.4 mm, 1 inch water gage = 249 Pa.
| ||||||
a.
|
Ductwork that exceeds twenty (20) inches by dimension or exceeds
a pressure of one (1) inch water gage (250 Pa) shall be constructed
in accordance with SMACNA HVAC Duct Construction Standards Metal and
Flexible.
|
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 (1) inch and shall
be mechanically fastened with 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.
| |
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.
|
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.
|
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 space smaller than
sixty-four (64) square feet, 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.
| |
4.
|
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.
| |
5.
|
Return air from one (1) dwelling unit shall not be discharged
into another dwelling unit.
|
M2105.4 Piping and tubing materials standards. Ground-source
heat-pump ground-loop pipe and tubing shall conform to the standards
listed in Table M2105.4. However, polyvinyl chloride (PVC) and chlorinated
polyvinyl chloride (CPVC) shall not be used for any geothermal application.
|
M2105.19 Pipe penetrations. Openings for pipe penetrations in
walls, floors and ceilings shall be larger than the penetrating pipe.
Openings in the foundation wall underground shall be sealed to not
allow groundwater into a building.
|
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
(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, 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 and shall
follow the manufacturer's installation instructions.
|
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.
|
Exception: Line sets and similar materials provided the installer
can provide documentation related to the material used such as, but
not limited to, a receipt, invoice, or container.
|
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 an enclosed space other than a bathroom, toilet room,
kitchen, garage, furnace room or unconditioned attic is provided with
a supply register, taking return air from that space 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.
|
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.
|
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 work areas shall have ground-fault circuit-interrupter protection
for personnel. [210.8(A)(2)]
|
Exception: Fastened in place appliances or outlets designated
for refrigerators or freezers on a dedicated circuit.
|
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
or freezers on a dedicated circuit.
|
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: Simplex receptacles on dedicated circuits serving
fastened in place appliances or refrigerators/freezers.
|
E3902.9 Laundry areas. 125-volt, single-phase, 15- and 20-ampere
receptacles, other than simplex receptacles on dedicated circuits
serving clothes washing machines installed in laundry areas shall
have ground-fault circuit-interrupter protection for personnel. [210.8(A)(9)]
|
E3902.14 Location of ground-fault circuit interrupters. Ground-fault
circuit interrupters shall be installed only in a readily accessible
location. [210.8(A)]
|
|
An "affiliated company" means any entity which,
directly or indirectly through one (1) or more intermediaries, controls
or is controlled by or is under common control with another entity.
|