City of St. Peters, MO Residential Code for One- and Two-Family Dwellings

[R.O. 2007 § 504.040; Ord. No. 4626 §§ 1—2, 9-14-2006; Ord. No. 5305 §§ 1—2, 12-17-2009; Ord. No. 5543 §§ 1—2 (Exh. A(504.040)), 2-10-2011; Ord. No. 5603 § 1, 6-23-2011; Ord. No. 6958, 5-10-2018; Ord. No. 7490, 8-26-2021; Ord. No. 7912, 12-21-2023]

The Code adopted in Section 504.010 is amended as follows:

R101.1 Title. These provisions shall be known as the Residential Code for One- and Two-Family Dwelling of the City of St. Peters, and shall be cited as such and will be referred to herein as "this code."

R101.2.90 Application Of Prior Codes. At the discretion of the City Administrator of the City of St. Peters, contractors may be allowed to complete residential construction under prior building codes, if the City should adopt new code(s) during active construction of the subdivision.

R102.5.90 Amend Appendices. Amend Appendices adopted under Section 504.010.

R105.2 Work Exempt From Permit. [Amended in its entirety to read as follows] Permits shall not be required for the following. Exemption from permit requirements of this code shall not be deemed to grant authorization for any work to be done in any manner in violation of the provisions of this code or any other laws or ordinances of this jurisdiction.

Building:
1.	One-story detached accessory structures used as tool and storage sheds, playhouses and similar uses, provided the floor area does not exceed one hundred twenty (120) square feet (11.15 m²).
2.	Fences not over six (6) feet (1,829 mm) high.
3.	Retaining walls that are not over four (4) feet (1,219 mm) in height measured from the lowest adjacent grade to top of the wall, unless supporting a surcharge or impounding Class I, II or IIIA liquids.
4.	Water tanks supported directly upon grade if the capacity does not exceed five thousand (5,000) gallons (18,927 L) and the ratio of height to diameter or width does not exceed two to one (2:1).
5.	Sidewalks, patio, and driveways except as required under Chapter 545, Section 545.020.
6.	Painting, papering, tiling, carpeting, cabinets, counter tops and similar finish work.
7.	Prefabricated swimming pools that are less than twenty-four (24) inches (610 mm) deep.
8.	Swings and other playground equipment.
9.	Window awnings support by an exterior wall which do not project more than fifty-four (54) inches (372 mm) from the exterior wall and do not require additional support.

Electrical:
1.	Listed cord-and-plug connected temporary decorative lighting.
2.	Reinstallation of attachment plug receptacles but not the outlets thereof.
3.	Replacement of branch circuit overcurrent devices of the required capacity in the same location.
4.	Electrical wiring, devices, appliances, apparatus, or equipment operating at less than twenty-five (25) volts and not capable of supplying more than fifty (50) watts of energy.
5.	Minor repair work, including the replacement of lamps or the connection of approved portable electrical equipment to approved permanently installed receptacles.

Gas:
1.	Portable heating, cooking, or clothes drying appliances.
2.	Replacement of any minor part that does not alter approval of equipment or make such equipment unsafe.
3.	Portable-fuel-cell appliances that are not connected to a fixed piping system and are not interconnected to a power grid.

Mechanical:
1.	Portable heating appliances.
2.	Portable ventilation appliances.
3.	Portable cooling units.
4.	Steam, hot- or chilled-water piping within any heating or cooling equipment regulated by this code.
5.	Replacement of any minor part that does not alter approval of equipment or make such equipment unsafe.
6.	Portable evaporative coolers.
7.	Self-contained refrigeration systems containing ten (10) pounds (4.54 kg) or less of refrigerant or that are actuated by motors of one (1) horsepower (746 W) or less.
8.	Portable-fuel-cell appliances that are not connected to a fixed piping system and are not interconnected to a power grid.

Plumbing:
1.	The stopping of leaks in drains, water, soil, waste or vent pipe; provided, however, that if any concealed trap, drainpipe, water, soil, waste or vent pipe becomes defective and it becomes necessary to remove and replace the same with new material, such work shall be considered as new work and a permit shall be obtained and inspection made as provided in this code.
2.	The clearing of stoppages or the repairing of leaks in pipes, valves or fixtures, and the removal and reinstallation of water closets, provided such repairs do not involve or require the replacement or rearrangement of valves, pipes, or fixtures.

R105.90 Integrated Permits. The Code Official may issue integrated building, plumbing, mechanical, electrical, etc., permits on a single permit application.

R106.1 Submittal Documents. Submittal documents consisting of construction documents, and other data shall be submitted in a digital format with each application for a permit. The construction documents shall be prepared by a registered design professional where required by the statutes of the jurisdiction in which the project is to be constructed. Where special conditions exist, the building official is authorized to require additional construction documents to be prepared by a registered design professional.

Exception: The building official is authorized to waive the submission of construction documents and other data not required to be prepared by a registered design professional if it is found that the nature of the work applied for is such that reviewing of construction documents is not necessary to obtain compliance with this code.

R106.1.90 Electronic Submission. Where design documents, including, but not limited to, plot plans, site plans, design drawings, specifications, etc., are originally created electronically, the building official is authorized to require electronic submittal of documents in a portable document format (PDF) or similar format for review. Where design documents were originally prepared on paper and are submitted in a paper form, the building official is authorized to charge a fee for converting those drawings to PDF equal to the cost incurred by city staff recreating the document and not to exceed more than one dollar ($1.00) per page.

Exception: Where submittal documents were originally prepared by hand and are eleven (11) inches by seventeen (17) inches or less, the fee for document conversion shall not be charged.

R106.1.1.90 Sprinkler Verification. All applications for permit for one- and two-family dwellings shall include a written verification by the builder affirming that a fire sprinkler system was offered to the purchaser prior to entering into the purchase contract in conformance with Section R313 of this code. If there is no purchaser at the time of the permit application submittal, then said verification shall be made as soon as there is a purchaser and prior to the issuance of a certificate of occupancy for the new residence.

R106.3.1 Approval Of Construction Documents. Where the Code 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 Code Official. The other set may be kept at the site of work or made available at the time of inspection and shall be open to inspection by the Code Official or a duly authorized representative.

10.

R108.2 Fee Schedule. On buildings, structures, electrical, gas, mechanical and plumbing systems or alterations requiring a permit, a fee for each permit shall be paid as required, in accordance with Appendix A, Schedule of Fee, of Title V of the Municipal Code of the City of St. Peters, Missouri.

11.

R108.2.90 Amount Due Or Refunds. The Code Official shall authorize the refunding of money. The collection of fees due to the City and the refunding of money shall be as follows:

Refund the full amount of any fee paid hereunder which was erroneously paid or collected.

Refund ninety percent (90%) or collect ten percent (10%) of the permit fee when no work has been done on the site and application required a plan review to process a permit.

Refund eighty percent (80%) or collect twenty percent (20%) of the permit fee when no work has been done on the site and application required a plan review to process a permit.

No refund if permit has been voided; if work has been stopped; or if any work has been done at the site.

The Code Official shall not authorize the refunding of any fee paid, except upon written application filed by the original permittee not later than one hundred eighty (180) days after the date of fee payment.

12.

R108.6 Work Commencing Before Permit Issuance. Any person who commences work requiring a permit on a building, structure, electrical, gas, mechanical, or plumbing system before obtaining the necessary permits shall be subject to a fee as set out in Appendix A, Schedule of Fees, of this Title. A fee may be assessed for each additional inspection that shall be in addition to the required permit fees.

Exception:

Earthwork

Stakeouts and other necessary planning procedures.

13.

R109.1.5.90 Supplemental Inspection. In addition to the required inspection heretofore specified, the Code Official may make other inspections, which in his/her judgment is reasonably necessary due to unusual construction or circumstances. The Code Official shall have the authority to inspect any construction work in order to ascertain whether compliance with the Building Code is being met and in order that he/she may properly enforce the rules promulgated by this code. These inspections may include but are not limited to examinations to determine whether zoning requirements are being met, and may include all other phases of building construction. A fee as set out in Appendix A of this Title may be assessed for each additional inspection.

14.

R109.1.5.90.1 Extra Inspection. If by judgment of the Code Official an inspection requested is not ready or accessible for inspection, or in the judgment of the Code Official the applicant has caused the City extra inspections other than typically required, a fee as set out in Appendix A of this Title may be assessed for each additional inspection or re-inspection.

15.

R109.90 Workmanship. Repairs, maintenance work, alterations or installations which are caused directly or indirectly by the enforcement of this code shall be executed and installed in a workmanlike manner in compliance with this code, in accordance with industry standards, and in accordance with the manufacturer's installation instructions.

16.

R110.1 Use And Occupancy. A building or structure shall not be used or occupied, and a change in the existing use or occupancy classification of a building or structure or portion thereof shall not be made until the building official has issued a certificate of occupancy therefor as provided herein. Issuance of a certificate of occupancy shall not be construed as an approval of a violation of the provisions of this code or of other ordinances of the jurisdiction. Certificates presuming to give authority to violate or cancel the provisions of this code or other ordinances of the jurisdiction shall not be valid.

Exceptions:

Work exempt from permits under Section R105.2.

Accessory building or structures.

Change in occupancy of an owner-occupied residential dwelling unit used exclusively as the primary residence of the owner, as defined in Section 525.045.

17.

R110.1.90 Use And Occupancy - Re-Occupancy Inspections. Refer to Chapter 525 of the Municipal Code of St. Peters for regulations concerning re-occupancy inspections of non-owner-occupied residential dwellings.

18.

R112 Board Of Appeals. A person shall have the right to appeal a decision of the Code Official to the Board of Appeals as established in Chapters 410 and 505 of the Municipal Code of the City of St. Peters. An application for appeal shall be based on a claim that the true intent of this code or the rules legally adopted hereunder have been incorrectly interpreted, the provisions of this code do not fully apply, or an equally good or better form of construction is proposed. The application shall be filed on a form obtained from the Code Official within twenty (20) days after the notice was served.

19.

R112.1 General. - Delete.

20.

R112.2 Limitations On Authority. - Delete.

21.

R112.3 Qualifications. - Delete.

22.

R112.4 Administration. - Delete.

23.

R114.90 Unlawful Continuance. Any person who shall continue any work in or about the structure after having been served with a stop work order, except such work that person is directed to perform to remove a violation or unsafe condition, shall be guilty of an offense.

24.

R202 Definitions. [Amend to Include]

ROUGH-IN

The installation of all parts of the plumbing system that must be completed prior to covering from view. This includes DWV, water supply and built-in fixture supports. DWV shall be the minimum installation in an unfinished area.

STORY ABOVE GRADE PLANE

Any story having its finished floor surface entirely above grade plane, or in which the finished surface of the floor next above is either of the following.

More than six (6) feet above grade plane.

More than twelve (12) feet (3,658 mm) above the finished ground level at any point.

Exception: When a crawl space or supporting wall is below a walkout basement, that supporting wall is to be engineered but will not be considered a story.

WORKMANLIKE

Executed in a skilled manner; e.g., generally plumb, level, square, in line, undamaged and without marring adjacent work.

25.

Table R301.2 Climatic And Geographic Design Criteria. The following values shall be entered into the table footnote b to the table are amended as follows:

Ground snow load = 20 P.S.F.

Wind speed = 115 M.P.H.

Seismic design category for residential construction = "C"

Weathering = Severe

Frost depth = 30 Inch

Termite = Yes

Winter design temp = 6 degrees

Ice barrier underlayment on the roof = none

Flood hazards = Start April 19, 1979 Latest August 2, 1996

Air freezing Index = 963

Mean annual temp = 55.2 degrees

The frost depth may require deeper footings than indicated in Figure R403.1(1)

26.

R302.1 Exterior Walls. Construction, projections, openings, and penetrations of exterior walls of dwellings and accessory building shall comply with Table R302.1(1); or dwellings equipped throughout with an automatic sprinkler system installed in accordance with Section P2904 shall comply with Table R302.1(2).

Exceptions:

Walls, projects, openings, or penetrations in walls perpendicular to the line used to determine the fire separation distance.

Walls of individual dwellings and accessory structures located on the same lot.

Detached tool shed 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.

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).

Foundation vents installed in compliance with this code are permitted.

Cantilevered manufactured fireplaces.

Roof eave overhangs.

Uncovered decks.

27.

R302.5.1 Opening Protection. Openings from a private garage directly into a room used for sleeping purposes shall not be permitted. Other openings between the garage and residence shall be equipped with solid wood doors not less than one and three-eighths (1 3/8) inches (35 mm) in thickness, solid or honeycomb-core steel doors not less than one and three-eighths (1 3/8) inches (35 mm) thick, or twenty minute fire-rated doors

28.

R302.13 Fire Protection Of Floors. Floor assemblies that are not required elsewhere in this code to be fire-resistance rated, shall be provided with one-half (1/2) inch (12.7 mm) gypsum wallboard membrane, five-eighths (5/8) inch (16 mm) wood structural panel membrane, or equivalent on the underside of the floor framing member. Penetrations or openings for ducts, vents, electrical outlets, lighting, devices, luminaires, wires, speakers, drainage, piping and similar openings or penetrations shall be permitted.

Fire blocking, draft stopping, fire taping, and/or additional framing is not required.

Exceptions:

Floor assemblies located directly over a space protected by an automatic sprinkler system in accordance with Section P2904, NFPA 13D, or other approved equivalent sprinkler system.

Floor assemblies located directly over a crawl space not intended for storage or fuel-fired appliances.

Portions of floor assemblies shall be permitted to be unprotected where complying with the following:

3.1	The aggregate area of the unprotected floor assembly does not exceed one hundred (100) square feet per HVAC zone.
3.2	Areas of the floor assembly covered by HVAC metal plenum, trunk lines, and steel structural beams shall be considered protected. Gypsum wallboard membrane shall be within two (2) inches of all previously listed items.

Wood floor assemblies using dimension lumber or structural composite lumber equal to or greater than two (2) inch by ten (10) inch (50.8 mm by 254 mm) nominal dimension, or other approved floor assemblies demonstrating equivalent fire performance.

29.

R303.5.2 Exhaust Openings. Exhaust air shall not be directed below six (6) feet and eight (8) inches onto public walkways.

30.

R303.8 Exterior Stairway Illumination. Exterior stairways shall be provided with an artificial light source. Exterior stairways providing access to a basement from the outdoor grade level shall be provided with an artificial light sources located at the bottom landing of the stairway.

31.

R306.4.90 Hose Bib. Every dwelling unit shall provide a minimum of one (1) frost-proof hose bib, which shall be protected from backflow per Section P2902.4.3.

32.

R306.4.90.1 Floor Drain. All basements and laundry areas shall have a floor drain.

33.

R309.5 Fire Sprinklers. Private garages shall be protected by fire sprinklers where the garage wall has been designed based on Table 302.1(2), Footnote a, and the homeowner has opted to purchase a fire sprinkler system for their resident, as per Missouri Revised Statutes Section 67.281. 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.

34.

R311.3 Floors And Landings At Exterior Doors. There shall be a landing or floor at each side of each 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%).

Exceptions:

Exterior balconies less than sixty (60) square feet (5.6 m²) and only accessible from a door are permitted to have a landing less than thirty-six (36) inches (914 mm) measured in the direction of travel.

Doors that are not required egress doors and are served by a stairway of no more than four (4) risers.

Doors protected by a guard in accordance with this code.

Doors protected in a manner approved by the Code Official.

35.

R311.3.2. Floor Elevations For Other Exterior Doors. Doors other than the required egress door shall be provided with landings or floors not more than seven and three-fourths (7 3/4) inches (196 mm) below the top of the threshold.

Exception: A top landing is not required where a stairway of four (4) or fewer risers is located on the exterior side of the door, provided the door does not swing over the stairway.

36.

R312.1.1 Where Required. Guards shall be provided for those portions of open-sided walking surfaces, including floors, stairs, parking lots, driveways, ramps, and landings that are located more than 30 inches (762 mm) measured vertically to the floor or grade below at any point within 36 inches (914 mm) horizontally to the edge of the open side. Insect screening shall not be considered as a guard.

37.

R312.1.1.90 Retaining Walls. A guard may be required for any retaining wall where there is a potential for an accidental fall off of the wall. A vegetative guard may be substituted at the discretion of the building code official.

38.

R312.1.1.90.1 Future Deck/Balcony. Doors installed for a future deck/balcony with raised floor surface more than thirty (30) inches (762 mm) above grade shall be protected in accordance with Section R312, or made inoperable to open more than four (4) inches clear.

39.

R312.90 Opening Limitations. Required guards shall not have openings from the walking surface to the required guard height which allow passage of a sphere four (4) inches (102 mm) in diameter. Guards shall not have an ornamental pattern or horizontal rails that would provide a ladder effect, as determined by the Code Official.

Exceptions:

The triangular openings at the open side of a stair, formed by the riser, tread and bottom rail of a guard, shall not allow passage of a sphere six (6) inches (153 mm) in diameter.

Guards on the open sides of stairs shall not have openings which allow passage of a sphere four and three-eighths (4 3/8) inches (111 mm) in diameter.

40.

R313.1 Townhouse Automatic Fire Sprinkler Systems. Notwithstanding the provisions of the Building Code and International Residential Code, as amended and adopted by the City of St. Peters, Missouri, a builder of one- or two-family dwellings 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 one- or two-family dwelling shall be denied the right to choose or decline to install a fire sprinkler system in such dwelling or residence being purchased.

Exception: An automatic residential fire sprinkler system shall not be required when additions or alterations are made to existing townhouses that do not have an automatic residential fire sprinkler system installed.

41.

R313.1.1 Design And Installation. Automatic residential fire sprinkler systems for townhouses shall be designed and installed in accordance with Section P2904 or NFPA 13D.

42.

R313.1.90 Additions And Alterations To Townhouses With Existing Automatic Fire Sprinkler Systems. An automatic residential fire sprinkler system shall be designed and installed per Section R313.1.1.

43.

R313.2 One- And Two-Family Dwelling Automatic Fire Systems. Notwithstanding the provisions of the Building Code and International Residential Code, as amended and adopted by the City of St. Peters, Missouri, a builder of one- or two-family dwellings 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 one- or two-family dwelling shall be denied the right to choose or decline to install a fire sprinkler system in such dwelling or residence being purchased.

Exception: An automatic residential fire sprinkler system shall not be required for additions or alterations to existing buildings that are not already provided with an automatic residential fire sprinkler system.

44.

R313.2.90 Additions And Alterations To One- And Two-Family Dwellings With Existing Automatic Fire Sprinkler Systems. An automatic residential fire sprinkler system shall be designed and installed per Section R313.1.1.

45.

R322 Flood-Resistant Construction. [Amended in its entirety to read as follows] Refer to Chapter 410 Floodplain Management of the Municipal Code of the City of St. Peters.

46.

R322.1 General. - Delete.

47.

R322.1.1 Alternative Provisions. - Delete.

48.

R322.1.2 Structural Systems. - Delete.

49.

R322.1.3 Flood-Resistant Construction. - Delete.

50.

R322.1.4 Establishing The Design Flood Elevation. - Delete.

51.

R322.1.4.1 Determination Of Design Flood Elevations. - Delete.

52.

R322.1.4.2 Determination Of Impacts. - Delete.

53.

R322.1.5 Lowest Floor. - Delete.

54.

R322.1.6 Protection Of Mechanical, Plumbing, And Electrical Systems. - Delete.

55.

R322.1.7 Protection Of Water Supply And Sanitary Sewage Systems. - Delete.

56.

R322.1.8 Flood Resistant Materials. - Delete.

57.

R322.1.9 Manufactured Homes. - Delete.

58.

R322.1.10 As-built Elevation Documentation. - Delete.

59.

R322.2 Flood Hazard Areas (Including A Zones). - Delete.

60.

R322.2.1 Elevations Requirements. - Delete.

61.

R322.2.2 Enclosed Area Below Required Elevation. - Delete.

62.

R322.2.2.1 Installation Of Openings. - Delete.

63.

R322.2.3 Foundation Design And Construction. - Delete.

64.

R322.2.4 Tanks. - Delete.

65.

R322.3 Coastal High-Hazard Areas (Including V Zones And Coastal A Zones, Where Designated). - Delete.

66.

R322.3.1 Location And Site Preparation. - Delete.

67.

R322.3.2 Elevation Requirements. - Delete.

68.

R322.3.3 Foundations. - Delete.

69.

R322.3.4 Concrete Slabs. - Delete.

70.

R322.3.5 Walls Below Required Elevation. - Delete.

71.

R322.3.6 Enclosed Areas Below Required Elevation. - Delete.

72.

R322.3.6.1 Protection of Building Envelope. - Delete.

73.

R322.3.7 Stairways and Ramps. - Delete.

74.

R322.3.8 Decks And Porches. - Delete.

75.

R322.3.9 Construction Documents. - Delete.

76.

R322.3.10 Tanks. - Delete.

77.

403.1.7 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 (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 licensed in the State of Missouri.

78.

Table R403.1(1) Minimum Width and Thickness for Concrete Footings for Light-Frame Construction. - Delete.

79.

Table R403.1(2) Minimum Width And Thickness For Concrete Footings For Light-Frame Construction With Brick Veneer Or Lath And Plaster. - Delete

80.

Table R403.1 (3) Minimum Width And Thickness For Concrete Footings With Cast-In-Place Concrete Or Partially Grouted Masonry Wall Construction. - Delete

81.

Table R403.1(90) Minimum Width Of Concrete, Precast Or Masonry Footings (Inches) For Light-Frame Construction With Pre-Fabricated Roof Trusses.

Story	Load-Bearing Value of Soil (psf)
Story	1,500	2,000	3,000	≥4,000
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: one (1) inch equals 25.4 mm. one (1) pound per square foot+0.0479 kPa

Spread footings shall be the 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 nominal concrete masonry units 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.

82.

Table R404.1.2(90) 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 place 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.

83.

R405.1 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. Drainage tiles, gravel or crushed stone drains, perforated pipe or other approved systems or materials shall be installed at or below the area to be protected and shall discharge by gravity or mechanical means into an approved drainage system. Gravel or crushed stone drains shall extend not less than one (1) foot (305 mm) beyond the outside edge of the footing and six (6) inches (152 mm) above the top of the footing and be covered with an approved filter membrane material. The top of open joints of drain tiles shall be protected with strips of building paper. Except where otherwise recommended by the drain manufacturer, perforated drains shall be surrounded with an approved filter membrane or the filter membrane shall cover the washed gravel or crushed rock covering the drain. Drainage tiles or perforated pipe shall be placed on a minimum of two (2) inches (51 mm) of washed gravel or crushed rock not less than one (1) sieve size larger than the tile joint opening or perforation and covered with not less than six (6) inches (152 mm) of the same material.

Exceptions:

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.

Drains provided as detailed in Section 405.1.2 are approved as an alternative method to meet the requirements of this Section.

84.

R405.1.90 Soil Evaluations. An evaluation of the soil for the presence or absence of groundwater is required. The evaluation report shall be based on either a subsurface soil investigation or satisfactory data from adjacent areas together with an inspection of the excavation prior to pouring concrete.

85.

R405.1.90.1 Groundwater Present. Provide drain tile, perforated pipe or other approved foundation drainage systems (such as water channel system) around the 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.

86.

R405.1.90.2 No Groundwater Present. Provide drain tile, perforated pipe or other approved foundation drainage systems (such as water channel system) around the 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.

87.

R405.1.90.3 Filter Membranes. An approved filter membrane shall be placed over the top of the joints/pipe perforation. The tile/pipe shall be placed on two (2) inches minimum of gravel or crushed stone and have six (6) inches of minimum cover.

88.

R405.1.90.4 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.

89.

R506.2.3 Vapor Retarder. A minimum 6 mil (0.006 inch; 0.152 mm) vapor retarder conforming to ASTM E1745 Class A requirements with joints lapped not less than 6 inches (152 mm) shall be placed between the concrete floor slab and the base course or the prepared subgrade where a base course does not exist.

Exception: The vapor retarder is not required for the following:

Garages, utility buildings and other unheated accessory structures.

For unheated storage rooms having an area of less than 70 square feet (6.5 m2) and carports.

Driveways, walks, patios, and other flatwork not likely to be enclosed and heated at a later date.

Where approved by the building official, based on local site conditions.

90.

R602.12 Simplified Wall Bracing. [Amended in its entirety to read as follows] Buildings meeting all 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.

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.

Floors shall not cantilever more than twenty-four (24) inches (607 mm) beyond the foundation or bearing wall below.

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.

The building shall have a roof eave-to-ridge height of fifteen (15) feet (4,572 mm) or less.

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.

The structure shall be located in Seismic Design Category A, B or C for detached one- and two-family dwellings or Seismic Design Category A, B or C for townhouses.

Cripple walls shall not be permitted in three-story buildings.

91.

R602.12.2 Sheathing Materials. 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.

Wood structural panels with a minimum thickness of seven-sixteenths (7/16) inch fastened in accordance with Table R602.3(3).

Structural fiberboard sheathing with a minimum thickness of one-half (1/2) inch (12.7 mm) fastened in accordance with Table R602.3(1).

92.

R602.12.3 Bracing Unit. 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 the required bracing. Mixing of Items 1 and 2 is prohibited on the same story.

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).

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).

93.

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:

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.

For open valley, 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.

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.

94.

R905.2.8.5 Drip Edge. A drip edge shall be provided at eaves and rake edges of shingle roofs. Adjacent segments of drip edge shall be overlapped not less than two (2) inches (51 mm). Drip edges shall extend not less than one-fourth (1/4) inch (6.4 mm) below the roof sheathing and extend up back onto the roof deck not less than two (2) inches (51 mm). Drip edges shall be mechanically fastened to the roof deck at not more than twelve (12) inches (305 mm) o.c. with fasteners as specified in Section R905.2.5. Underlayment shall be installed over the drip edge along eaves and under the underlayment along rake edges.

Exception: For new construction only, a drip edge is not necessary if the metal fascia is bent to form a drip edge.

95.

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 shall not include more than four (4) elbows.

Exception: When chimneys are installed per manufacturer's installation instructions.

96.

R1006.2 Exterior Air Intake. The exterior air intake for 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 at an elevation higher than the firebox. The exterior air intake shall be covered with a corrosion resistant screen of 1/2 inch (6.4 mm) mesh.

97.

N1101.6 (R202) Defined Terms. [Amended to include]

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.

98.

Table N1102.1.3 (R402.1.3).

Table N1102.1.3 (R402.1.3) Insulation Minimum R-Values And Fenestration Requirements By Component^a
Climate Zone	Fenestration U-Factor^b	Skylight^b U-Factor	Glazed Fenestration SHGC^b,e	Ceiling R-Value	Wood Frame Wall R-Value	Mass Wall R-Valueⁱ	Floor R-Value	Basement^c Wall R-Value	Slab^d R-Value & Depth	Crawl Space^c Wall R-Value
4A	.35	.60	NR	38	13	5/10	19	10ci or 13^f	10, 2 ft	10/13

For SI: 1 foot = 304.8 mm.
NR = Not Required. ci = continuous insulation.
^a	R-values are minimums. U-factors and SHGC are maximums. Where insulation is installed in a cavity that is less than the label or design thickness of the insulation, the installed R-value of the insulation shall be not 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: In Climate Zones 0 through 3, skylights shall be permitted to be excluded from glazed fenestration SHGC requirements provided that the SHGC for such skylights does not exceed 0.30.
^c	"5ci or 13" means R-5 continuous insulation (ci) on the interior or exterior surface of the wall or R-13 cavity insulation on the interior side of the wall. "10ci or 13" means R-10 continuous insulation (ci) on the interior or exterior surface of the wall or R-13 cavity insulation on the interior side of the wall. "15ci or 19 or 13&5ci" means R-15 continuous insulation (ci) on the interior or exterior surface of the wall; or R-19 cavity insulation on the interior side of the wall; or R-13 cavity insulation on the interior of the wall in addition to R-5 continuous insulation on the interior or exterior surface of the wall.
^d	R-5 insulation shall be provided under the full slab area of a heated slab in addition to the required slab edge insulation R-value for slabs. as indicated in the table. The slab-edge insulation for heated slabs shall not be required to extend below the slab.
^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 R301.1 and Table R301.1.
^g	The first value is cavity insulation; the second value is continuous insulation. Therefore, as an example, "13&5" means R-13 cavity insulation plus R-5 continuous insulation.
^h	Mass walls shall be in accordance with Section R402.2.5. The second R-value applies where more than half of the insulation is on the interior of the mass wall.
ⁱ	A maximum U-factor of 0.32 shall apply in Climate Zones 3 through 8 to vertical fenestration products installed in buildings located either:
	1.	Above 4,000 feet in elevation, or
	2.	In windborne debris regions where protection of openings is required by Section R301.2.1.2 of the International Residential Code.
^j	Unfinished basements may have up to a maximum of 20 percent 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 24 inches below outside finished grade when the grade is above the floor slab elevation.

99.

N1102.1.5 (R402.1.5) Total UA Alternative. If the total building envelope UA (sum of U-factor times assembly area) is less than or equal to the total UA resulting from using the U-factors in Table N1102.1.4 (multiplied by the same assembly area as in the proposed building), the building shall be considered in compliance with Table N1102.1.2. The UA calculation shall be done using a method consistent with the ASHRAE Handbook of Fundamentals and shall include the thermal bridging effects of framing materials. The SHGC requirements shall be met in addition to UA compliance.

Exception: Glazed Fenestration SHGC. In Climate Zone 4, permanently shaded vertical fenestration shall be permitted to satisfy SHGC requirements. The project 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.

100.

N1102.2.4 (R402.2.4) Access Hatches And Doors. Access doors from conditional 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 requirement of Table R1102.1.2 based on the applicable climate zone specified in Chapter 3.

101.

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 R1102.4.5.

102.

N1102.4.1 (R402.4.1) Building Thermal Envelope. The building thermal envelope shall comply with Sections N1102.4.1.1 through N1102.4.1.3. The sealing methods between dissimilar materials shall allow for differential expansion and contraction.

103.

N1102.4.1.1 (R402.4.1.1) Installation. The components of the building thermal envelope as indicated in Table N1102.4.1.1 shall be installed in accordance with the manufacturer's instructions and the criteria indicated in Table N1102.4.1.1, as applicable to the method of construction. Where required by the code official, an approved third party shall inspect all components and verify compliance.

104.

N1102.4.1.2 (R402.4.1.2) Testing. Any building or dwelling unit may be tested for air leakage. The maximum design air leakage rate for any building or dwelling unit under any compliance path shall not exceed 5.0 air changes per hour or 0.28 cubic feet per minute (CFM) per square foot [0.0079 m³/(s x m²)] of dwelling unit enclosure area. For any building or dwelling unit designed for 3.0 or less air changes per hour, testing shall be conducted in accordance with ANSI/RESNET/ICC 380, ASTM E779 or ASTM E1827 and reported at a pressure of 0.2 inch 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 have been sealed.

Exception:

For heated, attached private garages and heated, detached private garages accessory to one- and two-family dwelling and townhouses not more than three stories above grade plane in height, building envelope tightness and insulation installation shall be considered acceptable where the items in Table N1102.4.1.1, applicable to the method of construction, are field verified. Where required by the code official, an approved third party, independent from the installer shall inspect both the air barrier and insulation installation criteria. Heated, attached private garage space shall be thermally isolated from all other conditioned spaces in accordance with Sections N1102.2.12 and N1102.3.5, as applicable.

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, where installed at the time of the test, shall be open.
4.	Exterior or interior terminations for continuous ventilation systems shall be sealed.
5.	Heating and cooling systems, where installed at the time of the test, shall be turned off.
6.	Supply and return registers, where installed at the time of the test, shall be fully open.
Exception: When testing individual dwelling units, an air leakage rate not exceeding 0.30 cubic feet per minute per square foot [0.008m³/(s x m²)] of the dwelling unit enclosure area, tested in accordance with ANSI/RESNET/ICC 380, ASTM E779 or ASTM E1827 and reported at a pressure of 0.2 inch water gauge (50 Pa), shall be permitted in all climate zones for:
1.	Attached single- and multiple-family building dwelling units.
2.	Buildings or dwelling units that are 1,500 square feet (139.4m²) or smaller.
Mechanical ventilation shall be provided in accordance with Section M1505 of this code or Section 403.3.2 of the International Mechanical Code, as applicable, or with other approved means of ventilation.

105.

N1102.4.1.3 (R402.4.1.3) Leakage Rate. Where complying with Section N1101.13.1. the building or dwelling unit shall have a design air leakage rate not exceeding 5.0 air changes per hour.

106.

Table N1102.4.1.1 (402.4.1.1).

Table N1102.4.1.1 (R402.4.1.1)^a Air Barrier, Air Sealing, and Insulation Installation
Component	Air Barrier Criteria	Insulation Installation Criteria
General Requirements	A continuous air barrier shall be installed in the building envelope. 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 or 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 weatherstripped.	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.	Cavities within corners and headers of frame walls shall be insulated by completely filling the cavity with a material having a thermal resistance, R-value, of not less than R-3 per inch. 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 framing and skylights, and the jambs of windows and doors, shall be sealed.	—
Rim joists	Rim joists shall include an exterior air barrier.^b	Rim joists shall be insulated.
Floors, including cantilevered floors and floors above garages	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. Alternatively, floor framing cavity insulation shall be in contact with the top side of sheathing, or continuous insulation installed on the underside of floor framing and extending from the bottom to the top of all perimeter floor framing members.
Basement crawl space, and slab foundations	Exposed earth in unvented crawl spaces shall be covered with Class I vapor retarder/air barrier in accordance with Section N1102.2.10 (R402.2.10). Penetrations through concrete foundation walls and slabs shall be air sealed. Class 1 vapor retarders shall not be used as an air barrier on below-grade walls and shall be installed in accordance with Section R702.7	Crawl space insulation, where provided instead of floor insulation, shall be installed in accordance with Section N1102.2.10 (R402.2.10).
Shafts, penetrations	Duct and flue shafts and other similar penetrations to exterior or unconditioned space shall be sealed to allow for expansion, contraction and mechanical vibration. Utility penetrations of the air barrier shall be caulked, gasketed or otherwise sealed and shall allow for expansion, contraction of materials and mechanical vibration.	Insulation shall be fitted tightly around utilities passing through shafts and penetrations in the building thermal envelope to maintain required R-value.
Narrow cavities	Narrow cavities of 1 inch or less that are not able to be insulated shall be air sealed.	Batts to be installed in narrow cavities shall be cut to fit or narrow cavities shall be filled with insulation that on installation readily conforms to the available cavity space.
Garage separation	Air sealing shall be provided between the garage and conditioned spaces.	Insulated portions of the garage separation assembly shall be installed in accordance with Sections R303 and N1102.2.7 (R402.2.7).
Recessed lighting	Recessed light fixtures installed in the building thermal envelope shall be sealed in accordance with Section N1104.4.5 (R402.4.5).	Recessed light fixtures installed in the building thermal envelope shall be airtight and IC rated, and shall be buried or surrounded with insulation.
Plumbing, wiring or other obstructions	All holes created by wiring, plumbing or other obstructions in the air barrier assembly shall be air sealed.	Insulation shall be installed to fill the available space and surround wiring, plumbing, or other obstructions, unless the required R-value can be met by installing insulation and air barrier systems completely to the exterior side of the obstructions.
Shower/tub on exterior wall	The air barrier installed at exterior walls adjacent to showers and tubs shall separate the wall from the shower or tub.	Exterior walls adjacent to showers and tubs shall be insulated.
Electrical/phone box on exterior walls	The air barrier shall be installed behind electrical and communication boxes. Alternatively, air-sealed boxes shall be installed.	—
HVAC register boots	HVAC supply and return register boots that penetrate building thermal envelope shall be sealed to the subfloor, wall covering or ceiling penetrated by the boot.	—
Concealed sprinklers	Where 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.	—

For SI: 1 inch = 25.4 mm.
^a	Inspection of log walls shall be in accordance with the provisions of ICC 400.
^b	Air barrier and insulation full enclosure is not required in unconditioned/ventilated attic spaces and at rim joists.

107.

N1102.4.4 (R402.4.4) Rooms Containing Fuel-Burning Appliances. In Climate Zones 3 through 8, where open combustion air ducts provide combustion air to open combustion fuel-burning appliances, the appliances and combustion air opening shall be located outside the building thermal envelope or enclosed in a room, isolated from inside the thermal envelope. Such rooms shall be sealed and insulated in accordance with the envelope requirements of Table N1102.1.2, where the walls, floors and ceiling shall meet a minimum of the basement wall R-value requirement. The door into the room shall be fully gasketed and any water lines and ducts in the room insulated in accordance with Section N1103. The combustion air duct shall be insulated where it passes through conditioned space to a minimum of R-8.

Exceptions:

Direct vent appliances with both intake and exhaust pipes installed continuous to the outside.

Fireplaces and stoves complying with Sections N1102.4.2 and R1006.

Mechanical equipment in an unfinished space.

108.

N1103.3.4 (R403.3.4) 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:

Air-impermeable spray foam products shall be permitted to be applied without additional joint seals.

Continuously welded and locking-type longitudinal joints and seams in ducts operating at static pressure less than 2 inches of water column (500 Pa) pressure classification shall not require additional closure systems.

A duct air leakage test shall not be required where the ducts and air handlers are located entirely within the building thermal envelope.

109.

N1103.3.5 (R403.3.5) Duct Testing (Upon Discretion of the Authority Having Jurisdiction). Ducts shall be pressure tested to determine the air leakage by one (1) of the following methods:

1.	Rough-in test: Total leakage shall be measured with a pressure differential of one-tenth (0.1) inch w.g. (25 Pa) across the system, including the manufacturer's air handler enclosure if installed at the time of the test. All registers shall be taped or otherwise sealed during the test.
2.	Postconstruction test: Total leakage shall be measured with a pressure differential of one-tenth (0.1) inch w.g. (25 Pa) across the entire system, including the manufacturer's air handler enclosure. Registers shall be taped or otherwise sealed during the test.

Exception:
1.	A duct air leakage test shall not be required where ducts and air handlers are located entirely within the building thermal envelope.
2.	A duct air-leakage test shall not be required for ducts serving heating, cooling or ventilation systems that are not integrated with ducts serving heating or cooling systems.

110.

N1103.3.7 (R403.3.7) Building Cavitie. - Delete.

111.

N1103.5.2 (R405.5.2) 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:

Piping larger than 3/4 inch (19 mm) in nominal diameter.

Piping serving more than one (1) dwelling unit.

Piping located outside the conditioned space.

Piping from the water heater to a distribution manifold.

Piping located under a floor slab.

Buried in piping.

Supply and return piping in recirculation systems other than demand recirculation systems.

112.

N1103.6 (R403.6) Mechanical Ventilation. Buildings and dwelling units shall be provided with mechanical ventilation that complies with the requirements of Section M1505 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.

113.

N1103.6.1 (R403.6.1) Heat Or Energy Recovery Ventilation. - Delete.

114.

N1103.6.2 (R403.6.2) Whole-Dwelling Mechanical Ventilation System Fan Efficacy. - Delete.

115.

Table N1103.6.2 (R403.6.2) Whole-Dwelling Mechanical Ventilation System Fan Efficacy. - Delete.

116.

N1103.6.3 (R403.6.3) Testing. - Delete.

117.

N1104.2 (R404.2) Interior Lighting Controls. Permanently installed lighting fixtures may be controlled with a dimmer, an occupant sensor control or another control that is installed or built into the fixture.

Exceptions: Lighting controls shall not be required for the following:

Bathrooms.

Hallways.

Exterior lighting fixtures.

Lighting designed for safety or security.

118.

N1104.3 (R404.3 Exterior Lighting Controls). - Delete.

119.

M1201.2.90 Licensing Of Mechanical Contractors. For licensing requirement, refer to Section 515.050 of the Municipal Code of the City of St. Peters.

120.

M1305.1.3.1 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.

121.

M1307.2 Anchorage Of Appliances. Appliances designed to be fixed in position shall be fastened or anchored in an approved manner. In Seismic Design Categories D0, D1 and D2, 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:

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.

The anchorage strapping shall be in accordance with the appliance manufacturer's recommendations.

122.

M1411.3.1 Auxiliary And Secondary Drain Systems. In addition to the requirements of Section M1411.3, a secondary drain or auxiliary drain pan shall be required for each cooling or evaporator coil where damage to any building components will occur as a result of overflow from the equipment drain pan or stoppage in the condensate drain piping. Such piping shall maintain a minimum horizontal slope in the direction of discharge or not less than 1/8 unit vertical in 12 units horizontal (one-percent slope). Drain piping shall be not less than 3/4-inch (19 mm) nominal pipe size. One (1) of the following methods shall be used:

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 one-half (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).

A separate overflow drain line shall be connected to the drain pan installed with the equipment. This overflow drain shall discharge to a conspicuous point of disposal to alert occupants in the event of a stoppage of the primary drain. The overflow drain line shall connect to the drain pan at a higher level than the primary drain connection.

An auxiliary drain pan without a separate drain line shall be installed under the coils on which condensation will occur. This pan shall be equipped with a water level detection device conforming to UL 508 that will shut off the equipment served prior to overflow of the pan. The pan shall be equipped with a fitting to allow for drainage. The auxiliary drain pan shall be constructed in accordance with Item 1 of this Section.

A water level detection device conforming to UL 508 shall be installed that will shut off the equipment served in the event that the primary drain is blocked. The device shall be installed in the primary drain line, the overflow drain line or the equipment-supplied rain pan, located at a point higher than the primary drain line connection and below the overflow rim of such pan.

123.

M1411.3.1.2 Appliance, Equipment, And Insulation In Pans. Where appliances, equipment, or insulation are subject to water damage when auxiliary drain pans fill, that portion of the appliance, equipment, and insulation shall be installed above the rim of the pan. Supports located inside of the pan to support the appliance or equipment shall be water-resistant and approved.

Exception: When a secondary drain is provided from the drain pan.

124.

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.

125.

M1502.4.6.1 Specified Length. The maximum length of the exhaust duct shall be 35 feet (10 688 mm) from the connection to the transition duct from the dryer to the outlet terminal. Where fittings are used, the maximum length of the exhaust duct shall be reduced in accordance with Table M1502.4.6.1. The maximum length of the exhaust duct does not include the transition duct.

Exception: The maximum developed length may be extended to 55 feet if clearly labeled cleanouts are provided within 12 inches of the second elbow, at every elbow thereafter, and at least every 15 feet of developed length thereafter.

126.

M1503.6 Makeup Air Required. Exhaust hood systems capable of exhausting in excess of six hundred (600) cubic feet per minute (0.28 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. Damper 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.

Exception: Makeup air is not required for exhaust systems installed for the exclusive purpose of space cooling and intended to be operated only when windows or other air inlets are open.

127.

M1601.1.1 Above-Ground Duct Systems. Above-ground duct systems shall conform to the following:

Equipment connected to duct systems shall be designed to limit discharge air temperature to not greater than 250° F. (121° C.)

Factory-made ducts shall be listed as produced by the manufacturer and prior to use in the field, in accordance with UL 181 and installed in accordance with the manufacturer's instructions.

Fibrous glass duct construction shall conform to the SMACNA Fibrous Glass Duct Construction Standards or NAIMA Fibrous Glass Duct Construction Standards.

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.

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.

Duct systems shall be constructed of materials having a flame spread index of not greater than two hundred (200).

Stud wall cavities and the spaces between solid floor joists to be used as 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.
7.6.	Building cavities used as plenums shall be sealed.

Volume dampers, equipment and other means of supply, return, and exhaust air adjustment used in system balancing may be provided with access.

128.

Table M1601.1.1

Table M1601.1.1 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
<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

Round Duct Diameter (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 20 inches by dimension or exceeds a pressure of 1 inch water gage shall be constructed in accordance with SMACNA HVAC Duct Construction Standards - Metal and Flexible.

129.

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 18 A-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 UL181B 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 fitting 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:

Spray polyurethane foam shall be permitted to be applied without additional joint seals.

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.

Continuously welded and locking-type longitudinal joints and seam in ducts operating at static pressure less than two (2) inches of water column (500 Pa) pressure classification shall not require additional closure systems.

130.

M1602.2 Return Air Openings. Return air openings for heating, ventilation and air conditioning systems shall comply with all of the following:

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.

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.

Return air shall not be taken from a closet less than 70 square feet, bathroom, toilet room, kitchen, garage, mechanical room, boiler room, furnace room or unconditioned attic.

Exceptions:

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.

Dedicated forced-air systems serving only the garage shall not be prohibited from obtaining return air from the garage.

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.

Return air from one (1) dwelling unit shall not be discharged into another dwelling unit.

131.

M2101.22.6 Expansion Tanks. Delete.

132.

M2105.1.90 Compliance With State Statutes. Installation of ground source heat-pump system loop-piping shall comply with the materials and joining methods listed in the State of Missouri Revised Statutes Division 23, Chapter 5.

133.

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.

134.

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.

135.

G2439.7.4.1 (614.9.4.1) Specified Length. The maximum length of the exhaust duct shall be (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.

TABLE G2439.7.4.1 (TABLE 614.9.4.1) DRYER EXHAUST DUCT FITTING EQUIVALENT LENGTH [Retain as written]

136.

G2442.3 (618.3) Prohibited Sources. Outdoor or return air for forced-air heating and cooling systems shall not be taken from the following locations:

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.

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.

A hazardous or insanitary location or a refrigeration machinery room as identified in the International Mechanical Code.

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.

A room or space containing an appliance where such a room or space serves as the sole source of return air.

The appliance is a direct-vent appliance or an appliance not requiring a vent in accordance with Section G2425.8.

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.

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.

A closet, bathroom, toilet room, kitchen, garage, boiler room, furnace room or unconditioned attic.

Exceptions:

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.

Dedicated forced-air systems serving only a garage shall not be prohibited from obtaining return air from the garage.

Where a closet 70 square feet or greater in size is provided with a supply register, taking return air from the closet shall not be prohibited.

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.

137.

P2501.90 Licensing Of Plumbing Contractors. For licensing requirement, refer to Section 520.040 of the Municipal Code of the City of St. Peters.

138.

P2503.5.1 Rough Plumbing. 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:

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.

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.

Vacuum test. The portion under test shall be evacuated of air by a vacuum-type pump to achieve a uniform gauge pressure of -5 pounds per square inch or a negative 10 inches of mercury column (-34 kPa). This pressure shall be held without removal of additional air for a period of 15 minutes.

139.

P2801.8 Water Heater Seismic Bracing. 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.

140.

P2804.6.1 Requirements For Discharge Pipe. The discharge piping serving a pressure-relief valve, temperature-relief valve or combination valve shall:

Not be directly connected to the drainage system.

Discharge through an air gap located in the same room as the water heater.

Not be smaller than the diameter of the outlet of the valve served and shall discharge full size to the air gap.

Serve a single relief device and shall not connect to piping serving any other relief device or equipment.

Discharge to the floor, to the pan serving the water heater or storage tank, to a waste receptor or to the outdoors.

Discharge in a manner not to be a hazard; does not cause personal injury, structural damage, or otherwise a nuisance.

Discharge to a termination point that is readily observable by the building occupants.

Not be trapped.

Be installed to flow by gravity.

10.

Terminate not more than six (6) inches (152 mm) and not less than two (2) times the discharge pipe diameter above the floor or waste receptor flood level rim.

11.

Not have a threaded connection at the end of the piping.

12.

Not have valves or tee fittings.

13.

Be constructed of those materials indicated in Section P2906.5 or materials tested, rated and approved for such use in accordance with ASME A112.4.1.

14.

Be one (1) nominal size larger than the size of the relief-valve outlet, where the relief-valve discharge piping is constructed of PEX or PE-RT tubing. The outlet end of such tubing shall be fastened in place.

141.

E3401.1.1 Licensing Of Electrical Contractors. (Refer to Chapter 510 of the Municipal Code of the City of St. Peters for licensing requirements.)

142.

E3601.8 Emergency Disconnects. - Delete.

143.

E3902.2 Garage And Accessory Building Receptacles. All 125-volt, single-phase, 15- or 20-ampere receptacles installed in garages and grade-level portions of unfinished accessory buildings used for storage or work areas shall have ground-fault circuit-interrupter protection for personnel.

Exception: Fastened in place appliances or outlets designated for refrigerators/freezers, garage door openers, etc.

144.

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.

Exceptions:

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.

Fastened in place appliances or outlets designated for refrigerators/freezers.

145.

E3902.6 Kitchen Receptacles. 125-volt, single-phase, 15- and 20-ampere receptacles that serve countertop surfaces shall have ground-fault circuit-interrupter protection for personnel. [210.8(A)(6)]

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

146.

E3902.9 Laundry Areas. 125-volt, single-phase, 15- and 20-ampere receptacles installed in laundry areas shall have ground-fault circuit interrupter protection for personnel. [210.89(A)(10)]

147.

E3902.11 - Kitchen Dishwasher Branch Circuit. - Delete.

148.

E3902.18 Location Of Ground-Fault Circuit Interrupters. Ground-fault circuit-interrupters shall be installed only in a readily accessible location.

149.

E3902.20 Arc-Fault Circuit-Interrupter Protection. Branch circuits that supply 125-volt, single-phase, 15- and 20-ampere outlets installed in family rooms, dining rooms, living rooms, parlors, libraries, dens, bedrooms, sunrooms, recreation rooms, closets, hallways, and similar rooms 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 are-fault circuit-interrupter installed at the first outlet box on the branch-circuit where all of the following conditions are met:
	3.1	The branch-circuit wiring shall be continuous from the branch-circuit overcurrent device to the outlet branch-circuit arc-fault circuit-interrupter.
	3.2	The maximum length of the branch-circuit wiring from the branch-circuit overcurrent device to the first outlet shall not exceed fifty (50) feet (152 m) for 14 AWG conductors and seventy (70) feet (21.3 m) for 12 AWG conductors.
	3.3	The first outlet box in the branch-circuit shall be marked to indicate that it is the first outlet of the circuit. [210.12(A)(3)]
4.	A listed outlet branch-circuit type arc-fault circuit-interrupter installed at the first outlet on the branch circuit in combination with a listed branch-circuit overcurrent protective device where all of the following conditions are met:
	4.1	The branch-circuit wiring shall be continuous from the branch-circuit overcurrent device to the outlet branch-circuit arc-fault circuit-interrupter.
	4.2	The maximum length of the branch-circuit wiring from the branch-circuit overcurrent device to the first outlet shall not exceed fifty (50) feet (15.2 m) for 14 AWG conductors and seventy (70) feet (21.3 m) for 12 AWG conductors.
	4.3	The first outlet box in the branch-circuit shall be marked to indicate that it is the first outlet on the circuit.
	4.4	The combination of the branch-circuit overcurrent device and outlet branch-circuit AFCI shall be identified as meeting the requirements for a system combination-type AFCI and shall be listed as such. [210.12(A)(4)]
5.	Where metal outlet boxes and junction boxes and RMC, IMC, EMT, Type MC or steel armored Types AC cables meeting the requirements of Section E3908.8, metal wireways or metal auxiliary gutters are installed for the portion of the branch-circuit between the branch circuit overcurrent device and the first outlet, a listed outlet branch-circuit type AFCI installed at the first outlet shall be considered as providing protection for the remaining portion of the branch-circuit. [210.12(A)(5)]
6.	Where a listed metal or 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 overcurrent device and the first outlet, a listed outlet branch-circuit type AFCI installed at the first outlet shall be considered as providing protection for the remaining portion of the branch circuit. [210.12(A)(6)]
	Exception:
	1	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.
	2	AFCI protection shall not be required for all kitchen countertop receptacles, laundry receptacles and/or already required GFCI protected outlets.

150.

E3902.21 Arc-Fault Circuit-Interrupter Protection For Branch-Circuit Extensions Or Modifications. Where branch-circuit wiring is modified, replaced, or extended in any of the areas specified in Section E3902.16, the branch-circuit shall be protected by one (1) of the following:

A combination-type AFCI located at the origin of the branch-circuit.

An outlet branch-circuit type AFCI located at the first receptacle outlet of the existing branch circuit.

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]

151.

E4002.14 Tamper Resistant Receptacles. - Delete.

152.

Appendix AE Manufactured Housing Used As Dwellings.

153.

AE101.1 General. Factory-built structures, modular units or closed prefabricated assemblies shall not be acceptable unless they are built within the jurisdiction of the City of St. Peters and are subject to inspection by the Code Official, with the exception of a manufactured home, modular unit, or closed prefabricated assemblies used as a single dwelling unit, and installed per Section 405.170, "R-M" Mobile/Modular Home Residential District. These provisions shall be applicable only to the above described manufactured home, modular unit, or closed prefabricated assemblies used as a single dwelling unit in the "R-M" Mobile/Modular Home Residential District:

Construction, alteration, and repair of any foundation system, which is necessary to provide for the installation of a manufactured home unit.

Construction, installation, addition, alteration, repair, or maintenance of the building service equipment which is necessary for connecting manufactured homes to water, fuel, or power supplies and sewage systems.

Alterations, additions, or repairs to existing manufactured home. The construction, alteration, moving, demolition, repair, and use of accessory buildings and structures and their building service equipment shall comply with the requirement of the codes adopted by this jurisdiction.

These provisions shall not be applicable to the design and construction of manufactured homes and shall not be deemed to authorize either modification or additions to manufactured homes where otherwise prohibited.

Exception: New and replacement manufactured homes to be located in flood hazard areas are subject to Chapter 410, Floodplain Management of the Municipal Code of the City of St. Peters.

154.

AE107.1 Permit Fees. (Refer to Attachment 1, Title V, Appendix A of the Municipal Code of the City of St. Peters.)

155.

AE107.2 Plan Review Fees - Delete.

156.

AE107.3 Other Provisions. - Delete.

157.

AE107.3.1 Expiration Of Plan Review. - Delete.

158.

AE107.3.2 Investigation Fees - Work Without A Permit - Delete.

159.

AE107.3.2.1 Investigation. - Delete.