Article I: Building Code Adoption

Section 500.020 Additions — Revisions — Deletions.

[R.O. 2008 § 500.020; Ord. No. 1530, 11-9-2020]

The 2015 International Residential Code is amended by the following provisions. Each Section, Subsection, or clause of that code that numerically corresponds with one (1) of the following numbered provisions is hereby deleted where so noted or amended to read as set forth below. Each provision set out below without a corresponding Section, Subsection, or clause number in the code is hereby enacted and added thereto.

R106.3.1 Approval Of Construction Documents. Revise as follows:

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 inspections by the Building Official or a duly authorized representative.

R108.6 Work Commencing Before Permit Issuance. Add as follows:

Exceptions:
1.	Earthwork.
2.	Stakeouts and other necessary planning procedures.

Chapter 2: Definitions - Story Above Grade Plane. Revise as follows:

Any story having its finished floor surface entirely above grade plane, or in which the finished surface of the floor next above is:
1.	More than six (6) feet (1,829 mm) above grade plane; and
2.	More than six (6) feet (1,829 mm) above the finished ground level for more than fifty percent (50%) of the total building perimeter; and
3.	More than twelve (12) feet (3,658 mm) above the finished ground level at any point.

Table R301.2(1) Climate And Geographic Design Criteria. Insert the following values:

Ground snow load	20
Speed (mph)	115(51)
Topographic effects	No
Special wind region	No
Wind-borne debris zone	No
Seismic design category	C
Weathering	Severe
Frost line depth	30
Termite	No
Winter design temp	6
Ice barrier underlayment required	No
Flood hazards	TBD
Air freezing index	1,000
Mean annual temp	55.2

R302.1 Exterior Walls. Revise as follows:

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 lie 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. Revise as follows:

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 less than or equal to 3 feet
Walls — not fire-resistance rated	0 hours	Greater than 3 feet
Projections — fire resistance rated	1 hour on the underside^{a, b}	2 feet
Projections — not fire-resistance rated	0 hours	3 feet
Openings in walls — not allowed	N/A	Less than 3 feet
Openings in walls — 25% maximum of wall area	0 hours	3 feet
Openings in walls — unlimited	0 hours	3 feet
Penetrations — all	Comply with Section R302.4	Less than 3 feet
Penetrations — all	None required	3 feet

For SI: 1 foot = 304.8 mm

N/A = not applicable

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.

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. Revise as follows:

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 shall be two (2) independent one-hour fire-resistance-rated wall assemblies.

R302.5.1 Opening Protection. Revise as follows:

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 twenty-minute fire-rated doors.

R302.5.2. Duct Penetration. Revise as follows:

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 gage (0.378 mm) sheet steel or other approved material and shall not have openings into the garage.

10.

R302.13 Fire Protection Of Floors. Revise as follows:

Remove Section R302.13 in its entirety.

11.

R303.3 Bathrooms. Revise as follows:

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 to a gabled end vent.

12.

R303.4 Mechanical Ventilation. Revise as follows:

Where the air filtration 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.

13.

R303.5.2 Exhaust Openings. Revise as follows:

Exhaust air shall not be directed below six (6) feet and eight (8) inches onto public walkways.

14.

R303.8 Exterior Stairway Illumination. Revise as follows:

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.

15.

R309.5 Fire Sprinklers. Revise as follows:

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.

16.

R311.3 Floors And Landings At Exterior Doors. Revise as follows:

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 one-fourth (1/4) unit vertical in twelve (12) units horizontal two percent (2%).

17.

R311.3.2 Floor Elevations For Other Exterior Doors. Revise as follows:

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 the door does not swing over the stairway.

18.

R311.7.5 Stair Treads And Risers. Add as follows:

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-fourth (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.

19.

R311.7.6. Landings For Stairways. Revise as follows:

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.

20.

R312.1.1 Where Required. Revise as follows:

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.

21.

R312.2 Window Fall Protection. Revise as follows:

Remove Sections R312.2, R312.2.1, and R312.2.2 in their entirety.

22.

R313.1 Townhouse Automatic Fire Sprinkler Systems. Revise as follows:

An automatic residential fire sprinkler system shall be installed in townhouses, in accordance with Section 67.281, RSMo.

23.

R313.2 One- And Two-Family Dwellings Automatic Fire Systems. Revise as follows:

A builder of a single-family dwelling or residence or multi-unit 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 multi-unit 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 multi-unit dwelling of four (4) or fewer units.

24.

R323.1 General. Revise as follows:

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.

25.

R403.1.1 Minimum Size. Revise as follows:

The minimum width, W, and thickness, T, for concrete footings shall be in accordance with Tables R403.1(1) through R403.1(4) and Figure R403.1(1) or R403.1.3, as applicable. The footing width shall be based on the load-bearing value of the soil in accordance with Table R401.4.1. Footing projections, P, shall be not less than two (2) inches (51 mm) and shall not exceed the thickness of the footing. Footing thickness and projection for fireplaces shall be in accordance with Section R1001.2. The size of footings supporting piers and columns shall be based on the tributary load and allowable soil pressure in accordance with Table R401.4.1. Footings for wood foundations shall be in accordance with the details set forth in Section R403.2, and Figures R403.1(2) and R403.1(3).

26.

Table R403.1(4) Add as follows:

Table R403.1(4) Minimum Width of Concrete, Precast, or Masonry Footings (inches) for Light-Frame Construction with Pre-Fabricated Roof Trusses ^{a, b, c}
	Load-Bearing Value of Soil (psf)
	1500	2000	3000	Greater than or equal to 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

Spread footings shall be same thickness as the wall [minimum of eight (8) inches].

Where minimum footing width is twelve (12) inches, use of a single wythe of solid or fully grouted twelve-inch (12) nominal concrete masonry unit is permitted.

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.

27.

R403.1.7 Footings On Or Adjacent To Slopes. Revise as follows:

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.

28.

R404.1.3.2 Reinforcement For Foundation Walls. Add as follows:

Exception:

Where unstable soil or ground water conditions do not exist, concrete foundation walls may be constructed in accordance with Table R404.1.2(10).

29.

Table R404.1.2(10) Add as follows:

Table R404.1.2(10) Concrete Foundation Walls
Maximum Wall Height (feet)	Maximum Depth of Unbalanced Backfill	Minimum Nominal Wall Thickness (inches)
8	7 ft. 6 in. or less	8^a
9	8 ft. 6 in. or less	10^b
10	9 ft. 6 in. or less	12^c

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) no. 4 reinforcing bars shall be placed horizontally in the top and bottom of the foundation wall. A minimum of two (2) no. 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.

Concrete foundation walls may be constructed a minimum of nominal ten (10) inches thick. A minimum of two (2) no. 5 reinforcing bars shall be placed horizontally in the top, middle, and bottom of the foundation wall. A minimum of two (2) no. 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.

Concrete foundation walls may be constructed a minimum of nominal twelve (12) inches thick. A minimum of three (3) no. 5 reinforcing bars shall be placed horizontally in the top, middle, and bottom of the foundation wall. A minimum of two (2) no. 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 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.

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.

30.

R405.1 Concrete Or Masonry Foundations. Add as follows:

Exceptions:

2.	Drains provided as detailed in Section R405.1.2 are approved as an alternative method to meet the requirements of this Section.

31.

R405.1.2 Soil Evaluations. Add as follows:

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.

32.

R405.1.2.1 Groundwater Present. Add as follows:

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.

33.

R405.1.2.2 No Groundwater Present. Add as follows:

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.

34.

R405.1.2.3 Filter Membranes. Add as follows:

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.

35.

R405.1.2.4 Drainage System. Add as follows:

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.

36.

R507.2.4 Deck Lateral Connection. Revise as follows:

Remove Section R507.2.4 in its entirety.

37.

Table R602.7.5 Minimum Number Of Full Height Studs At Each End Of Headers In Exterior Walls. Revise as follows:

Remove Table R602.7.5 in its entirety and replace with the following table.

Table R602.7.5 Minimum Number of Full Height Studs at Each End of Headers in Exterior Walls^a
Ultimate Design Wind Speed and Exposure Category
Maximum Header Span (feet)	Less than 140 mph, Exposure B, or less than 130 mph, Exposure C	Less than or equal to 115 mph, Exposure B^b
4	1	1
6	2	1
8	2	1
10	3	2
12	3	2
14	3	2
16	4	2
18	4	2

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 less than one hundred forty (140) mph, Exposure B.

38.

R602.12 Simplified Wall Bracing. Revise as follows:

Buildings meeting all of the conditions listed below shall be permitted to be braced in accordance with this Section as an alternate to the requirements of Section R602.10. The entire building shall be braced in accordance with this Section; the use of other bracing provisions of Section R602.10, except as specified herein, shall not be permitted.
1.	There shall be not more than three (3) stories above the top of a concrete or masonry foundation or basement wall. Permanent wood foundations shall not be permitted.
2.	Floors shall not cantilever more than twenty-four (24) inches (607 mm) beyond the foundation or bearing wall below.
3.	Wall height shall not be greater than a nominal twelve (12) feet when using the minimum required bracing lengths specified in Table 602.12.4.
	Exception: Structural calculations and details are not required when there are no braced wall panels in that portion of a wall where the height exceeds a nominal twelve (12) feet and that greater wall height segment is part of a prescriptive braced wall line on each of the adjacent stories.
4.	The building shall have a roof eave-to-ridge height of fifteen (15) feet (4,572 mm) or less.
5.	Exterior walls shall have gypsum board with a minimum thickness of one-half (1/2) inch (12.7 mm) installed on the interior side fastened in accordance with Table R702.3.5.
	Exception: Gypsum board is not required for wall bracing on exterior walls in garages.
6.	The structure shall be located where the ultimate design wind speed is less than or equal to one hundred thirty (130) mph (58 m/s), and the exposure category is B or C.
7.	The structure shall be located in Seismic Design Category A, B, or C for detached one- and two-family dwellings or Seismic Category A, B, or C for townhouses.
8.	Cripple walls shall not be permitted in three-story buildings.

39.

R602.12.2 Sheathing Materials. Revise as follows:

The following sheathing materials installed on the exterior side of exterior walls shall be used to construct a bracing unit as defined in Section R602.12.3. Mixing materials is prohibited.
1.	Wood structural panels with a minimum thickness of seven-sixteenths (7/16) inch fastened in accordance with Table R602.3(3).
2.	Structural fiberboard sheathing with a minimum thickness of one-half (1/2) inch (12.7 mm) fastened in accordance with Table R602.3(1).

40.

R602.12.3 Bracing Unit. Revise as follows:

A bracing unit shall be a full-height sheathed segment of the exterior wall without openings or vertical or horizontal offsets and a minimum length as specified herein. Interior walls shall not contribute toward the amount of required bracing. Mixing of items 1 and 2 is prohibited on the same story.
1.	Where all framed portions of all exterior walls are sheathed in accordance with Section R602.12.2, including wall areas between bracing units, above and below openings and on gable end walls, the minimum length of a bracing unit shall be three (3) feet (914 mm). For walls with heights greater than a nominal ten (10) feet, the minimum length of a bracing unit shall be four (4) feet (1,219 mm).
2.	Where the exterior walls are braced with sheathing panels in accordance with Section R602.12.2 and areas between bracing units are covered with other materials, the minimum length of a bracing unit shall be four (4) feet (1,219 mm).

41.

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. Add as follows:

The construction documents shall detail the locations and widths of all braced wall panels in accordance with this Section.

42.

R602.13.1 Wood Structural Sheathing. Add as follows:

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.

43.

R602.13.2 Braced Wall Panel Locations. Add as follows:

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 (800) 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-inch (610-mm) wide full height sheathed wall placed ninety degrees (90°) to the end of the braced wall line and panel.
2.	The centerline spacing of braced wall panels I a braced wall line may not exceed twenty-five (25) feet (7,620 mm).

44.

R603.13.3 Braced Wall Panel Widths. Add as follows:

Braced wall panel locations shall be shown on the floor plans or elevation views and meet the widths established in Table R602.13.3.

45.

Table 602.13.3 Add as follows:

Simplified Bracing Panel Widths
	Width of Solid Panel^{a, b}
		8 ft. wall height (in.)	9 ft. wall height (in.)	10 ft. wall height (in.)	12 ft. wall height (in.)
Plywood/OSB Panel	3:1	32	36	40	48
Simplified Portal Wall^c	6:1	16^d	18^d	20^d	24^d

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-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.

46.

R602.13.4 Corner Framing. Add as follows:

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.

47.

R602.13.5 Braced Wall Line Spacing. Add as follows:

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.

48.

R602.13.6 Maximum Wall Height. Add as follows:

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.

49.

Figure 602.13.3 Add as follows:

Simplified portal wall as shown on sheet attached hereto.

50.

Figure 602.10.10.4 Add as follows:

Simplified bracing exterior corner framing as shown on sheet attached hereto.

FIGURE R602.10.10.4
SIMPLIFIED BRACING EXTERIOR CORNER FRAMING
a.	END STUD INDICATED ON THE ABOVE DETAILS MAY BE SHIFTED 7/16 INCH TO ALLOW STUD FACE TO BE ALIGNED WITH SHEATHING, OR AN OPTIONAL NON-STRUCTURAL FILLER PANEL MAY BE USED.

51.

R905.2.8.2 Valleys. Revise as follows:

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 two (2) ply of no. 15 felt complying with 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.

52.

R905.2.8.5 Drip Edge. Revise as follows:

Remove Section R905.2.8.5 in its entirety.

53.

R1005.7 Factory-Built Chimney Offsets. Revise as follows:

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.

54.

R1006.1.1 Factory-Built Fireplaces. Revise as follows:

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.

55.

R1006.2 Exterior Air Intake. Revise as follows:

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-fourth (1/4) inch (6.4 mm) mesh.

56.

Chapter 11 Energy Efficiency. Revise as follows:

Remove Chapter 11 in its entirety.

57.

M1301.2 Identification. Revise as follows:

Remove Section M1301.2 in its entirety.

58.

M1301.3 Installation Of Materials. Revise as follows:

Remove Section M1301.3 in its entirety.

59.

M1301.4 Plastic Pipe, Fittings And Components. Revise as follows:

Remove Section M1301.4 in its entirety.

60.

M1301.5 Third Party Testing And Certification. Revise as follows:

Remove Section M1301.5 in its entirety.

61.

M1305.1.4.1 Ground Clearance. Revise as follows:

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.

62.

M1305.1.4.3 Electrical Requirements. Add as follows:

Exception: basements.

63.

M1307.2 Anchorage Of Appliances. Revise as follows:

Appliances designed to be fixed in position shall be fastened or anchored in an approved manner. In Seismic Design Categories D₀, D₁, and D₂, 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.

64.

M1401.3 Equipment And Appliance Sizing. Revise as follows:

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.

65.

M1411.3.1 Auxiliary And Secondary Drain Systems. Revise as follows:

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 not be 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 six hundred twenty-five ten thousandths (0.0625) inch (1.6 mm).

66.

M1501.1 Outdoor Discharge. Revise as follows:

Exceptions:
1.	Whole-house ventilation-type attic fans that discharge into the attic space of dwelling units having private attics shall be permitted.
2.	Bathroom exhaust may discharge to an attic gable vent or ventilated soffit.

67.

M1502.4.1 Material And Size. Revise as follows:

Exhaust ducts shall be constructed of metal having a minimum thickness of one hundred fifty-seven ten thousandths (0.0157) inch (0.3950 mm) (no. 30 gage). The duct shall be four (4) inches (102 mm) nominal in diameter.

68.

M1502.4.2 Duct Installation. Revise as follows:

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.

69.

M1502.4.5.1 Specified Length. Add as follows:

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.

70.

M1503.4 Makeup Air Required. Revise as follows:

Exhaust hood systems capable of exhausting in excess of six hundred (600) cubic feet per minute 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 a means of closure and shall be automatically controlled to start and operate simultaneously with the exhaust system.

71.

M1506.3 Exhaust Openings. Revise as follows:

Remove Section M1506.3 in its entirety.

72.

M1507.2 Recirculation Of Air. Revise as follows:

Exhaust air from bathrooms and toilet rooms shall not be recirculated within a residence or to another dwelling unit and shall be exhausted in accordance with Section M1501.1.

73.

M1601.1.1 Above-Ground Duct Systems. Revise as follows:

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 two hundred fifty degrees Fahrenheit (250° F.) (121° C.).
2.	Fibrous glass duct construction shall conform to the SMACNA Fibrous 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 one hundred twenty-five degrees Fahrenheit (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 two hundred (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:
	a.	These cavities or spaces shall not be used as a plenum for air supply.
	b.	These cavities or spaces shall not be a part of required fire-resistance-rated assembly.
	c.	Stud wall cavities shall not convey air from more than one (1) floor level.
	d.	Stud wall cavities and joist-space plenums shall be isolated from adjacent concealed spaces by tight-fitting fireblocking in accordance with Section R602.8.
	e.	Stud wall cavities in the outside walls of building envelope assemblies shall not be utilized as air plenums.

74.

Table M1601.1.1 Revise as follows:

Duct Construction Minimum Sheet Metal Thickness for Single Dwelling Units^a
Round Duct Diameter (inches)	Static Pressure
	1/2 inch water gage		1 inch water gage
	Thickness (inches)		Thickness (inches)
	Galvanized	Aluminum	Galvanized	Aluminum
Less than or equal to 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

Duct Construction Minimum Sheet Metal Thickness for Single Dwelling Units^a
Rectangular Duct Dimension (largest dimension)	Static Pressure
	1/2 inch water gage		1 inch water gage
	Thickness (inches)		Thickness (inches)
	Galvanized	Aluminum	Galvanized	Aluminum
Less than or equal to 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.

75.

M1601.4.1 Joints, Seams And Connections. Revise as follows:

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 nonmetallic 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 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.

76.

M1602.2 Return Air Openings. Revise as follows:

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 manufacturer's installation instructions, Manual D or the design of the registered design professional.
3.	Return air shall not be taken from a 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 (1) dwelling unit shall not be discharged into another dwelling unit.

77.

M2105.4 Piping And Tubing Materials Standards. Revise as follows:

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 on geothermal ground loops both inside and underground.

78.

M2105.9 CPVC Plastic Pipe. Revise as follows:

Remove Section M2105.9 in its entirety.

79.

M2105.9.1 Threaded Joints. Revise as follows:

Remove Section M2105.9.1 in its entirety.

80.

M2105.14 PVC Plastic Pipe. Revise as follows:

Remove Section M2105.14 in its entirety.

81.

M2105.15.6 Expansion Tanks. Revise as follows:

Remove Section M2105.15.6 in its entirety.

82.

M2105.19 Pipe Penetrations. Revise as follows:

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.

83.

M2105.28 Testing. Revise as follows:

The assembled loop system shall be pressure tested with water at forty-five (45) psi for fifteen (15) minutes without observed leaks. Flow and pressure loss testing shall be performed and the actual flow rates and pressure drops shall be compared to the calculated design values. If actual flow rate or pressure drop values differ from calculated design values by more than ten percent (10%), the cause shall be identified and corrective action taken.

84.

G2408.4 (305.7) Clearances From Grade. Revise as follows:

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.

85.

G2409.1 (308.1) Scope. Revise as follows:

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.

86.

G2412.9 (401.9) Identification. Revise as follows:

Remove Section G2412.9 (401.9) in its entirety.

87.

G2412.10 (401.10) Third Party Testing And Certification. Revise as follows:

Remove Section G2412.10 (401.10) in its entirety.

88.

G2415.3 (404.3) Prohibited Locations. Add as follows:

Exception: Or installed as approved by the Authority Having Jurisdiction (AHJ), such as Ameren or Spire Gas.

89.

G2428.3.16 (504.3.20) Chimney And Vent Locations. Revise as follows:

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. 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.

90.

G2439.7.4.1 (614.8.4.1) Specified Length. Revise as follows:

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.

91.

G2442.4 (618.4) Prohibited Sources. Revise as follows:

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 room or space serves as the sole source of return air.
	Exception: This shall not apply where:
	i.	The appliance is a direct-vent appliance or an appliance not requiring a vent in accordance with Section G2425.8.
	ii.	The room or space complies with the following requirements:
1.	The return air shall be taken from a room or space having a volume exceeding one (1) cubic foot for each 10 Btu/h (9.6L/W) of combined input rating of all fuel-burning appliances therein.
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.
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.
iii.	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:
	i.		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 air from a kitchen area shall not be prohibited.
	ii.		Dedicated forced air systems serving only a garage shall not be prohibited from obtaining return air from the garage.
	iii.		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 or direct connection to the return side of a forced-air system. Transfer openings in the crawl space enclosure shall not be prohibited.

92.

P2503.5.1 Rough Plumbing. Revise as follows:

DWV systems shall be tested on completion of the rough piping installation by water or 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.

93.

P2603.4 Pipes Through Foundation Walls. Revise as follows:

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.

94.

P2690.1 Identification. Revise as follows:

Remove Section P2690.1 in its entirety.

95.

P2609.2 Installation Of Materials. Revise as follows:

Remove Section P2609.2 in its entirety.

96.

P2609.3 Plastic Pipe, Fittings And Components. Revise as follows:

Remove Section P2609.3 in its entirety.

97.

P2609.4 Third-Party Certification. Revise as follows:

Remove Section P2609.4 in its entirety.

98.

P2706.3 Prohibited Waste Receptors. Revise as follows:

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.

99.

P2801.8 Water Heater Seismic Bracing. Revise as follows:

In Seismic Design Categories D₀, D₁, and D₂, 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.

100.

P2903.5 Water Hammer. Revise as follows:

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.

101.

P2904.1 General. Revise as follows:

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.

102.

R3201.2.1 Trap Seal Protection. Add as follows:

Exception: basement floor drains with a condensate line draining to it.

103.

E3609.3 Bonding For Other Systems. Revise as follows:

Remove Section E3609.3 in its entirety.

104.

E3701.5.1 Disconnecting Means. Revise as follows:

Each multi-wire branch circuit may be provided with a means that will simultaneously disconnect all underground conductors at the point where the branch circuit originates. [210.4(B)]

105.

E3902.2 Garage And Accessory Building Receptacles. Add as follows:

Exception: fastened in place appliances or outlets designated for refrigerators/freezers.

106.

E3902.5 Unfinished Basement Receptacles. Revise as follows:

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.

107.

E3902.6 Kitchen Receptacles. Add as follows:

Exception: fastened in place appliances or outlets designated for refrigerators/freezers.

108.

E3902.9 Laundry Areas. Revise as follows:

Remove Section E3902.9 in its entirety.

109.

E3902.10 Kitchen Dishwasher Branch Circuit. Revise as follows:

Remove Section E3902.10 in its entirety.

110.

E3902.14 Location Of Ground-Fault Circuit Interrupters. Revise as follows:

Ground-fault circuit interrupters shall be installed only in a readily accessible location.

111.

E3902.16 Arc-Fault Circuit-Interrupter Protection. Revise as follows:

Branch circuits that supply 120-volt, single phase, 15- and 20-ampere outlets installed in bedrooms shall be protected by any of the following: [210.12(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 arc-fault circuit interrupter installed at the first outlet box on the branch circuit where all of the following conditions are met:
	a.	The branch-circuit wiring shall be continuous from the branch-circuit over-current device to the outlet branch-circuit arc-fault circuit interrupter.
	b.	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.
	c.	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:
	a.		The branch-circuit wiring shall be continuous from the branch-circuit over-current device to the outlet branch-circuit arc-fault circuit interrupter.
	b.		The maximum length of the branch-circuit wiring from the branch-circuit over-current 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.
	c.		The first outlet box in the branch circuit shall be marked to indicate that it is the first outlet on the circuit.
	d.		The combination of the branch-circuit over-current 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 over-current 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 non-metallic 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 over-current 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.

112.

E3902.17 Arc-Fault Circuit Interrupter Protection For Branch Circuit Extensions Or Modifications. Revise as follows:

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 thirty (30) feet (9.5 m) in length and does not include any additional outlets or devices. [210.12(B) Exception]

113.

E4002.8 Damp Location. Revise as follows:

A receptacle installed outdoors in a location protected from the weather or in other damp locations shall have an enclosure for the receptacle that is weatherproof when the receptacle cover(s) is closed and an attachment plug cap is not inserted. An installation suitable for wet locations shall also be considered suitable for damp locations. A receptacle shall be considered to be in a location protected from the weather where located under roofed open porches, canopies and similar structures and not subject to rain or water runoff.

114.

E4002.14 Tamper Resistant Receptacles. Revise as follows:

Remove Section E4002.14 in its entirety.