§ 500.045. Amendments., Article III. International Residential Code, Chapter 500. Model or Standard Code Adoptions, Title V. Building and Construction, Code of Ordinances, Mission

Section R101.1 Title. Amend the paragraph to read: These provisions shall be known as the Residential Code for One- and Two-Family Dwellings of City of Mission, and shall be cited as such and will be referred to herein as "this code".

Section R108.2 Schedule Of Permit Fees. Amend the paragraph to read: On buildings, structures, electrical, gas, mechanical, and plumbing systems or alterations requiring a permit, a fee for each permit shall be paid as set forth by resolution of the City Council. When submittal documents are incomplete or changed so as to require additional plan review or when the project involves deferred submittal items, an additional plan review fee shall be charged. Applications for which no permit is issued within 180 days following the date of application shall expire by limitation, and plans and other data submitted for review may thereafter be returned to the applicant or destroyed by the Building Code Official. The Building Code Official may extend the time for action by the applicant for a period not exceeding 180 days on written request by the applicant showing that circumstances beyond the control of the applicant have prevented action from being taken. No application shall be extended more than once. In order to renew action on an application after expiration, the applicant shall resubmit plans and pay a new plan review fee.

Section R301.2 Climatic And Geographic Design Criteria. Amend Table R301.2(1) to read as set out in Attachment A to this Chapter, which contains the amended Table of Climactic and Geographic Design Criteria.

Section R302.2 of the 2012 International Residential Code for One- and Two-Family Dwellings is hereby amended to read as follows: R302.2 Townhouses. Each townhouse shall be considered a separate building and shall be separated by fire-resistance-rated wall assemblies meeting the requirements of Section 706 of the International Building Code, or when townhouses on both sides of the fire-resistance-rated wall assembly are equipped throughout with an automatic sprinkler system installed in accordance with Section P2904, the wall separating the townhouses shall meet the requirements of Sections 302.1, 302.2.1, 302.2, 302.2.3, and 302.2.4 of this code.

Exception. When townhouses on both sides of the fire-resistance-rated wall assembly are equipped throughout with an automatic sprinkler system installed in accordance with Section P2904, a common 1-hour fire-resistance-rated wall assembly tested in accordance with ASTM E 199 or UL 263 is permitted for townhouses if such walls do not contain plumbing, mechanical equipment, ducts, or vents in the cavity of the common wall. The wall shall be rated for fire exposure from both sides and shall extended to and be tight against exterior walls and the underside of the roof sheathing. Electrical installations shall be installed in accordance with Chapters 34 through 43. Penetrations of electrical outlet boxes shall be in accordance with Section R302.4.

Section R302.3 of the 2012 International Residential Code for One- and Two-Family Dwellings is hereby amended to read as follows: R302.3 Two-family dwellings. Two-family dwellings shall be separated in accordance with the requirements for townhouses as set forth in this code.

Section R303.4 of the 2012 International Residential Code for One- and Two-Family Dwellings is hereby amended to read as follows: R303.4 Mechanical Ventilation. Where the air infiltration rate of a dwelling unit is less than 3 air changes per hour when tested with a blower door at a pressure of 0.2 inch w.g. (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.

Section R313.2 of the 2012 International Residential Code for One- and Two-Family Dwellings is hereby amended to read as follows: R313.2 One- and two-family dwellings automatic fire systems. An automatic residential fire sprinkler system may be installed in one- and two-family dwellings.

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

Section R315.3 of the 2012 International Residential Code for One- and Two-Family Dwellings is hereby amended to read as follows: R315.3 Where required in existing dwellings. Where work requiring a permit occurs in existing dwellings that have attached garages or in existing dwellings within which fuel-fired appliances exist, carbon monoxide alarms shall be provided in accordance with Section R315.1.

Exceptions:

Work involving the exterior surfaces of dwellings, such as the replacement of roofing or siding, or the addition or replacement of windows or doors, or the addition of a porch or deck, are exempt from the requirements of this Section.

Installation, alteration or repairs of plumbing or mechanical systems are exempt from the requirements of this Section.

Section R401 of the 2012 International Residential Code for One- and Two-Family Dwellings is hereby amended to read as follows: R401.1 Application. The provisions of this Chapter shall control the design and construction of the foundation and foundation spaces for all buildings. In addition to the provisions of this Chapter, the design and construction of foundations in flood hazard areas as established by Table R301.2(1) or the designated flood hazard areas shall meet the provisions of Section R322. Wood foundations shall be designed and installed in accordance with AF and PA PWF.

Foundation designs for one- and two-family dwellings may use the approved standards and designs provided in the Johnson County Residential Foundation Guidelines in lieu of the prescriptive requirements of Chapter 4 of this code as approved by the Building Official.

	Exception. The provisions of this Chapter shall be permitted to be used for wood foundations only in the following situations:
	1.	In buildings that have no more than two floors and a roof.
	2.	When interior basement and foundation walls are constructed at intervals not exceeding 50 feet.
	Wood foundations in Seismic Design Category D, D or D shall be designed in accordance with accepted engineering practice.

Section R404.1.3 of the 2012 International Residential Code for One- and Two-Family Dwellings is hereby amended to read as follows: R404.1.3 Design required. A design in accordance with accepted engineering practice shall be provided for concrete or masonry foundation walls when any of the conditions listed below exist. Where applicable, a standard design approved by the City may be used in lieu of a design from the design professional. For new single-family dwellings where standard designs approved by the City are used, the design professional sealing the plans shall specify the use of those designs on the approved plans or through a separate report.

Walls are subject to hydrostatic pressure from ground water.

Walls supporting more than 48 inches (48") of unbalanced backfill that do not have permanent lateral support at the top and bottom.

Sites containing CH, MH, OL, or OH soils as identified in Table R405.1

Foundation walls exceeding nine feet (9') in height, measured from the top of the wall to the bottom of the slab.

Lots identified on the subdivision grading plan as having more than six feet (6') of fill or having a finished slope steeper than 4 horizontal to 1 vertical before grading.

Footings and foundations with existing fill soils below the footing level.

Sloping lots steeper than 4 to 1 before grading.

Lots where some footings will bear on soil and others will bear on rock.

Areas where problems have historically occurred.

10.

Stepped footing and foundation walls.

11.

Garage floor slabs supported on more than 24 inches (24") of clean sand or gravel or eight inches (8") of earth.

Section R602.6.1 of the 2012 International Residential Code for One- and Two-Family Dwellings is hereby amended to read as follows: Section R602.6.1 Drilling and notching of top plate. When piping or ductwork is placed in or partly in an exterior wall or interior load-bearing wall, necessitating cutting, drilling or notching of the top plate by more than 50 percent of its width, a galvanized metal tie not less than 0.054 inch thick (1.37 mm) (16 gas) and 1½ inches (38 mm) wide shall be fastened across and to the plate not less than four 10d (0.148 inch diameter) nails having a minimum length of 1½ inches (38 mm) at each side or equivalent. The metal tie must extend a minimum of 6 inches past the opening. See Figure R602.6.1.

Section R907.3 of the 2012 International Residential Code for One- and Two-Family Dwellings is hereby amended to read as follows: R907.3 Recovering versus replacement. New roof coverings shall not be installed without first removing all existing layers of roof coverings where any of the following conditions exist:

Where the existing roof or roof covering is water-soaked or has deteriorated to the point that the existing roof or roof covering is not adequate as a base for additional roofing.

Where the existing roof covering is asphalt shingle, wood shake, slate, clay, cement or asbestos-cement tile.

Where the existing roof has two or more applications of any type of roof covering.

		Exceptions:
	1.	Complete and separate roofing systems, such as standing-seam metal roof systems, that are designed to transmit the roof loads directly to the building's structural system and that does not rely on existing roofs and roof coverings for support, shall not require the removal of existing roof coverings.
	2.	Installation of metal panel, metal shingle, and concrete and clay tile roof coverings over existing wood shake roofs shall be permitted when the application is in accordance with Section R907.4.
	3.	The application of new protective coating over existing spray polyurethane foam roofing systems shall be permitted without tear-off of existing roof coverings.

Section N1101.1 of the 2012 International Residential Code for One- and Two-Family Dwellings is hereby amended to read as follows: N1101.1 Scope. This Chapter regulates the energy efficiency for the design and construction of buildings regulated by this code.

As an alternative to the provisions of Chapter 11 of this code, structures validated by an accepted certified energy auditor to meet a HERS rating score of 85 or less shall be deemed to meet this code. The energy auditor shall present national certification credentials to the Building Official for review and approval prior to issuance of the building permit, and no Certificate of Occupancy shall be issued for the structure until all documentation has been received and accepted that compliance is met.

Failure to meet the compliant rating of 85 or less shall result in a " notice" to the owner that the structure has failed to comply with this code. Such "notice" shall be signed by the contractor and the owner.

Section N1101.3 (R101.4.3) of the International Residential Code for One- and Two-Family Dwellings is hereby amended to read as follows: N1101.3 (R101.4.3) Additions, alterations, renovations, or repairs. Additions, alterations, renovations or repairs to an existing building, building system or portion thereof shall conform to the provisions of this code as they relate to new construction without requiring the unaltered portion(s) of the existing building or building system to comply with this code. Additions, alterations, renovations or repairs shall not create an unsafe or hazardous condition or overload existing building systems. An addition shall be deemed to comply with this code if the addition alone complies or if the existing building and addition comply with this code as a single building.

Section N1101.8 (R103.2) of the International Residential Code for One- and Two-Family Dwellings is hereby amended to read as follows: N1101.8 (R103.2) Information on Construction documents. Construction documents shall be drawn to scale upon suitable material. Electronic media documents are permitted to be submitted when approved by the Building Official. Construction documents shall be of sufficient clarity to indicate the location, nature and extent of the work proposed, and show in sufficient detail pertinent data and features of the building, systems and equipment as herein governed. Details shall include, but are not limited to, insulation materials and their R-values; fenestration U-factors and SHGCs; area-weighted U-factor and SHGC calculations; mechanical system design criteria; mechanical and service water heating system and equipment types, sizes and efficiencies; economizer description; equipment and systems controls; fan motor horsepower (hp) and controls; duct sealing, duct and pipe insulation and location; (deleted light fixture information) and air sealing details.

Table N1102.1.1 (R402.1.1) of the International Residential Code for One- and Two-Family Dwellings is hereby amended to read as set out in Attachment B to this Chapter, which contains the amended .

Table N1102.4.1.1 (R402.4.1.1) of the International Residential Code for One- and Two-Family Dwellings is hereby amended to read as follows:

TABLE N1102.4.1.1 (R402.4.1.1) AIR BARRIER AND INSULATION INSTALLATION
Component	Criteria
Air barrier and thermal barrier	A continuous air barrier shall be installed in the building envelope. Exterior thermal envelope contains a continuous air barrier. Breaks or joints in the air barrier shall be sealed. Air-permeable insulation shall not be used as sealing material.
Ceiling/attic	The air barrier in any dropped ceiling/soffit shall be aligned with the insulation and any gaps in the air barrier sealed. Access opening, drop down stair or knee wall doors to unconditioned attic spaces shall be sealed.
Walls	Corners and the junction of the foundation and sill plate shall be sealed. Exterior thermal envelope insulation for framed walls shall be installed in substantial contact and continuous alignment with the air barrier. Knee walls shall be sealed.
Windows, skylights and doors	The space between window/door jambs and framing and skylights and framing shall be sealed.
Rim joists	Rim shall be sealed to prevent air leakage.
Floors (including above garage and cantilevered floors)	Insulation shall be installed to maintain permanent contact with underside of subfloor decking. The air barrier shall be installed at any exposed edge of insulation.
Crawl space walls	Where provided in lieu of floor insulation, insulation shall be permanently attached to the crawlspace walls. Exposed earth in unvented crawl spaces shall be covered with a Class I vapor retarder with overlapping joints taped.
Shafts, penetrations	Duct shafts, utility penetrations, and flue shafts opening to exterior or unconditioned space shall be sealed.
Narrow cavities	Batts in narrow cavities shall be cut to fit, or narrow cavities shall be filled by insulation that on installation readily conforms to the available cavity space.
Garage separation	Air sealing shall be provided between the garage and conditioned spaces.
Recessed lighting	Recessed light fixtures installed in the building thermal envelope shall be air tight, IC rated, and sealed to the drywall.
Plumbing and wiring	Batt insulation shall be cut neatly to fit around wiring and plumbing in exterior walls, or insulation that on installation readily conforms to available space shall extend behind piping and wiring.
Shower/tub on exterior wall	Exterior walls adjacent to showers and tubs shall be insulated and the air barrier installed separating them from the showers and tubs.
Electrical/phone box on exterior walls	The air barrier shall be installed behind electrical or communication boxes or air-sealed boxes shall be installed.
HVAC register boots	HVAC register boots that penetrate building thermal envelope shall be sealed to the subfloor or drywall.
Fireplace	An air barrier shall be installed on fireplace walls.

Section N1102.4.1.2 (R402.4.1.2) of the International Residential Code for One- and Two-Family Dwellings is hereby amended to read as follows: N1102.4.1.2 (R402.4.1.2) Testing. Where required by the Building Official, the building or dwelling unit shall be tested and verified as having an air leakage rate of not exceeding 5 air changes per hour. Testing shall be conducted with a blower door at a pressure of 0.2 inches w.g. (50 Pascals). Where required by the Building 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 Building Official.

Testing shall be performed at any time after creation of all penetrations of the building thermal envelope.

During testing:

Exterior windows and doors, fireplace and stove doors shall be closed, but not sealed, beyond the intended weather stripping or other infiltration control measures;

Dampers including exhaust, intake, makeup air, backdraft and flue dampers shall be closed, but not sealed beyond intended infiltration control measures;

Interior doors, if installed at the time of the test, shall be open;

Exterior doors for continuous ventilation systems and heat recovery ventilators shall be closed and sealed;

Heating and cooling systems, if installed at the time of the test, shall be turned off; and

Supply and return registers, if installed at the time of the test, shall be fully open.

Section N1103.2.2 (R403.2.2) of the International Residential Code for One- and Two-Family Dwellings is hereby amended to read as follows: N1103.2.2 (R403.2.2) Sealing (Mandatory). Ducts, air handlers, and filter boxes shall be sealed. Joints and seams shall comply with Section M1601.4.1 of this code.

Exceptions:

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

Where a duct connection is made that is partially inaccessible, three 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 seams in ducts operating at static pressures less than two inches (2") of water column (500 Pa) pressure classification shall not require additional closure systems.

	Where required by the Code Official, duct tightness shall be verified by either of the following:
	1.	Post construction test: Total leakage shall be less than or equal to 4 cfm 113.3 L/min) per 100 square feet (9.29 m2) of conditioned floor area when tested at a pressure differential of 0.1 inches w.g. (25 Pa) across the entire system, including 44 the manufacturer's air handler enclosure. All register boots shall be taped or otherwise sealed during the test.
	2.	Rough-in test: Total leakage shall be less than or equal to 4 cfm (113.3 L/min) per 100 ft2 square feet (9.29 m2) of conditioned floor area when tested at a pressure differential of 0.1 inches w.g. (25 Pa) across the system, including the manufacturer's air handler enclosure. All registers shall be taped or otherwise sealed during the test. If the air handler is not installed at the time of the test, total leakage shall be less than or equal to 3 cfm (85 L/min) per 100 square feet (9.29 m2) of conditioned floor area.
	Exceptions:
	1.	The total leakage test is not required for ducts and air handlers located entirely within the building thermal envelope.
	2.	On the post construction test, it is permissible to test for "leakage to the outdoors" versus a "total leakage". Leakage to the outdoors shall be less than or equal to 8 cfm per 100 square feet of conditioned floor area.

Section N1104.1 (R404.1) of the International Residential Code for One- and Two-Family Dwellings is hereby amended to read as follows: N1104.1 (R404.1) Lighting equipment (Mandatory). Fuel gas lighting systems shall not have continuously burning pilot lights.

Section M1507.2 of the 2012 International Residential Code for One- and Two-Family Dwellings is hereby amended to read as follows: M1507.2 Recirculation of air. Exhaust air from bathrooms and toilet rooms shall not be recirculated within a residence or to another dwelling unit and may be exhausted into a ventilated attic with the discharge point at least six (6) inches above insulation.

Section P2503.3 of the 2012 International Residential Code for One- and Two-Family Dwellings is hereby amended to read as follows:

P2503.3 Responsibility of permittee. The permit holder shall provide the test prescribed in Sections P2503.5 through P2503.8. Test equipment, materials and labor shall be furnished by the permittee.

Exceptions:

The testing of the DWV rough plumbing system shall be done in accordance with Section P2503.5.1 when required by the Code Official.

The testing of the building sewer shall be done in accordance with Section P2503.4 when required by the Code Official.

Section P2603.5.1 of the International Residential Code for One- and Two-Family Dwellings is hereby amended to read as follows: P2603.5.1 Sewer depth. Building sewers shall be installed as required by the appropriate authority having jurisdiction.

Section P2905.4.2 of the International Residential Code for One- and Two-Family Dwellings is hereby amended to read as follows: P2905.4.2 Water service installation. Trenching, pipe installation and backfilling shall be in accordance with Section P2604. Where the building sewer is installed within 5 feet (1,524 mm) of the water service, the installation shall comply with the provisions provided by the appropriate authority having jurisdiction.

Exception: The required separation distance shall not apply where a water service pipe crosses a sewer pipe, provided that the water service pipe is sleeved not less than 5 feet (1,524 mm), horizontally from the sewer pipe centerline, on both sides of the crossing with pipe materials listed in Table P2905.4, P3002.1(1), P3002.1(2), or P3002.2.

Section E3902.2 of the International Residential Code for One- and Two-Family Dwellings is hereby amended to read as follows:

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.

Exceptions:

Receptacles supplying only garage doors.

Receptacles supplying only refrigerators or freezers.

Section E3902.5 of the International Residential Code for One- and Two-Family Dwellings is hereby amended to read as follows: E3902.5 Unfinished basement receptacles. All 125 volt, single-phase, 15- and 20-ampere receptacles installed in finished 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 the like.

Exceptions:

A receptacle supplying only a permanently installed fire alarm or burglar alarm system.

A receptacle supplying only a sump pump.

aa)

Section E3902.12 of the 2012 International Residential Code for One- and Two-Family Dwellings is hereby amended to read as follows: E3902.12 Arc-fault circuit-interrupter protection. All branch circuits that supply 120-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 or areas shall be protected by a combination type arc-fault circuit interrupter installed to provide protection of the branch circuit. For these purposes, a smoke alarm shall not be considered an outlet and shall not be included in the arc-fault circuit.

Exceptions no. 1, 2, and 3 apply.

Add exception 4 to read:

This Section will not apply where existing dwelling unit premises wiring circuits make the application of this Section impracticable, as determined by the Building Official.

Informational Note:

One example of the application of this exception is where the existing dwelling unit utilizes a listed panelboard for which there is no listed device for the application of AFCI protection for a multi-wire branch circuit.