Chapter 15.16
RESIDENTIAL CODE AMENDMENTS

Sections:

15.16.010    Local amendments to the International Residential Code, 2015 Edition.

15.16.020    Administration.

15.16.R202    Definitions.

15.16.R301.2(1)    Table R301.2(1), Climatic and geographic design criteria.

15.16.R301.5    Table R301.5, Minimum uniformly distributed live loads.

15.16.R302.5.1    Opening protection.

15.16.R302.6    Table R302.6, Dwelling/garage separation.

15.16.R303.1    Habitable rooms (light and ventilation).

15.16.R303.3    Bathrooms.

15.16.R309.1    Garages and carports.

15.16.R310.2.1    Minimum opening area.

15.16.R313    Automatic fire sprinkler systems.

15.16.R315.1    Interconnection.

15.16.R401.3    Drainage.

15.16.403.1    General.

15.16.R403.1.1    Minimum size.

15.16.Table R403.1    Minimum width of concrete or masonry footings.

15.16.R403.3.3    Drainage.

15.16.R403.3.4    Termite damage.

15.16.R403.4.1    Crushed stone footings.

15.16.Table R403.4    Minimum depth of crushed stone footings.

15.16.R406.1    Concrete and masonry foundation damp-proofing.

15.16.R807.1    Attic access.

15.16.R905.14    Sprayed polyurethane foam roofing.

15.16.010 Local amendments to the International Residential Code, 2015 Edition.

The amendments to the 2015 Edition of the International Residential Code are listed hereafter by section. The last digits of the section number, after the title and chapter digits, refer to the section of the International Residential Code being amended; i.e., PMC 15.16.R202 refers to Section R202. (Ord. 17-005 § 4, 2017)

15.16.020 Administration.

Administrative actions under this chapter shall be in accordance with Chapters 15.00 and 15.02 PMC. (Ord. 17-005 § 4, 2017)

15.16.R202 Definitions.

Amend by adding the following definition:

DUPLEX DWELLING UNIT is a building which contains not more than two dwelling units which are not otherwise distinguished or separated by a recorded lot line.

(Ord. 17-005 § 4, 2017)

15.16.R301.2(1) Table R301.2(1), Climatic and geographic design criteria.

Amend this table to read as follows:

Roof Snow load:

50 psf

Wind speed:

110 mph

Seismic Design Category:

D2

Weathering:

Severe

Frost line depth:

42" below finished grade

(Ord. 17-005 § 4, 2017)

15.16.R301.5 Table R301.5, Minimum uniformly distributed live loads.

Amend this table by deleting the value of 30 psf for sleeping rooms and replace with 40 psf live load for sleeping rooms. (Ord. 17-005 § 4, 2017)

15.16.R302.5.1 Opening protection.

Add the following sentence to this section:

Doors between the garage and residence shall be self-closing and latching. Doors shall be equipped with tight fitting smoke gasket seals installed along the top and sides of doors. A tight-fitting threshold seal shall also be installed.

(Ord. 17-005 § 4, 2017)

15.16.R302.6 Table R302.6, Dwelling/garage separation.

Amend this table as follows:

Revise all references in the table to one-half-inch gypsum board and replace with five-eighths-inch-thick type X gypsum board.

Revise line two of the Material column to read as follows:

Not less than one layer five-eighths inch type X gypsum board for nominal dimensional lumber or two layers of gypsum board as required by ICC Report ESR 1336 or as required by other proprietary research reports for specific engineered I joists which achieve a one-hour rated assembly.

(Ord. 17-005 § 4, 2017)

15.16.R303.1 Habitable rooms (light and ventilation).

Replace this section and the exceptions with the following:

All habitable rooms shall be provided with natural light by means of exterior glazed openings with an area of not less than five percent of the floor area of such rooms with a minimum area of five square feet, except that minimum egress requirements shall govern. Natural ventilation shall be provided by openings to the exterior of not less than four percent of the floor area of habitable rooms. Such openings shall be openable and readily controllable by the building occupants. In lieu of required exterior openings for natural ventilation, a mechanical ventilating system may be provided. Such system shall be capable of providing air changes in accordance with the 2015 IECC as adopted and amended.

(Ord. 17-005 § 4, 2017)

15.16.R303.3 Bathrooms.

Delete this section in its entirety, rename and replace with the following:

Section R303.3 Bathrooms and kitchens. Bathrooms, water closet compartments and similar rooms shall have a mechanical ventilating system connected directly to the outside capable of providing five air changes per hour. Moisture exhaust ducts shall be smooth and rigid. All moisture exhaust ducts located in an unconditioned space shall be insulated with a minimum R-11 and installed so as not to create low points where condensation may collect. All exhaust ducts shall be equipped with back-draft damper.

Kitchens shall have mechanical exhaust ventilation provided directly above or immediately adjacent to the primary cooking appliance. All vents shall be in accordance with IMC 2015.

(Ord. 17-005 § 4, 2017)

15.16.R309.1 Garages and carports.

The area of floor used for parking of automobiles or other vehicles shall be sloped to facilitate the movement of liquids to a drain or toward the main vehicle entry doorway. The door entering the residence shall be self-closing and self-latching with smoke gasket. (Ord. 17-005 § 4, 2017)

15.16.R310.2.1 Minimum opening area.

Delete the exception. (Ord. 17-005 § 4, 2017)

15.16.R313 Automatic fire sprinkler systems.

Delete this section in its entirety. (Ord. 17-005 § 4, 2017)

15.16.R315.1 Interconnection.

Add new subsection to read as follows:

In new construction, carbon monoxide detectors shall be interconnected in such a manner that the actuation of one alarm will activate all of the alarms in the individual dwelling unit.

(Ord. 17-005 § 4, 2017)

15.16.R401.3 Drainage.

Delete the section and the exception and replace with the following:

Surface drainage shall be diverted to a storm sewer conveyance or other approved point of collection so as to not create a hazard. Lots shall be graded to drain surface water away from foundation walls. The grade shall be sloped a minimum of two percent within the first 10 feet. It shall be the responsibility of the owner or contactor to assure that discharge of roof and surface runoff is disposed of without affecting the adjacent property. Surface drainage across lot lines is prohibited.

(Ord. 17-005 § 4, 2017)

15.16.403.1 General.

Delete the reference to “wood foundations” in the first sentence and add the following sentence to the end of the section to read as follows:

Wood footings shall be designed and stamped by a registered engineer licensed in the State of Alaska.

(Ord. 17-005 § 4, 2017)

15.16.R403.1.1 Minimum size.

Amend by adding the following:

Footings shall have a minimum depth of 42 inches unless another depth is recommended by a foundation investigation.

(Ord. 17-005 § 4, 2017)

15.16.Table R403.1 Minimum width of concrete or masonry footings.

Amend by revising the minimum footing width to 15 inches and minimum thickness to seven inches for supporting one floor. (Ord. 17-005 § 4, 2017)

15.16.R403.3.3 Drainage.

Delete this section in its entirety and replace with the following:

Final site drainage shall be in accordance with Section R401.3.

(Ord. 17-005 § 4, 2017)

15.16.R403.3.4 Termite damage.

Delete this section in its entirety. (Ord. 17-005 § 4, 2017)

15.16.R403.4.1 Crushed stone footings.

Delete this section in its entirety. (Ord. 17-005 § 4, 2017)

15.16.Table R403.4 Minimum depth of crushed stone footings.

Delete this section in its entirety. (Ord. 17-005 § 4, 2017)

15.16.R406.1 Concrete and masonry foundation damp-proofing.

Amend this section by revising the first sentence to read as follows:

Except where required by Section R406.2 to be water proofed, foundation walls that retain earth and enclose interior spaces and floors below grade shall be damp-proofed from the top of the footing to 6 inches above finished grade.

Amend this section by adding exception 2 to read as follows:

2. Crawl space foundation walls or walls backfilled on both sides, such as those used in conjunction with a “slab on grade”, do not require damp-proofing.

(Ord. 17-005 § 4, 2017)

15.16.R807.1 Attic access.

Add the following sentence to the end of the second paragraph:

Attic access shall not be located in a room containing bathing facilities or closets. The minimum size of the access shall be 23 inches by 48 inches.

Exception: Attic access may be provided from the exterior gable vent in accordance with size and opening requirements of this section. The gable vent must be readily accessible.

(Ord. 17-005 § 4, 2017)

15.16.R905.14 Sprayed polyurethane foam roofing.

Delete this section in its entirety. (Ord. 17-005 § 4, 2017)