Chapter 17.01
INTERNATIONAL BUILDING CODE

Sections:

17.01.010    Adoption.

17.01.020    Amendments and additions.

17.01.010 Adoption.

The 2015 Edition of the International Building Code (IBC) including the adoption of ICC/ANSI A117.1-2009, Requirements for Accessible and Useable Buildings and Facilities, as adopted and amended by the State Building Code Council in Chapter 51-50 WAC, as published by the International Code Council, excluding Chapter 1, Administration, is adopted by reference, together with the following amendments and additions. The Construction Administrative Code, as set forth in Chapter 17.14 MICC, shall be used in place of IBC Chapter 1, Administration. The codes, appendices, and standards set forth in this chapter shall be filed with the city clerk and a copy made available for use and examination by the public, pursuant to RCW 35A.12.140.

Exceptions. The provisions of this code do not apply to temporary growing structures used solely for the commercial production of horticultural plants including ornamental plants, flowers, vegetables, and fruits. “Temporary growing structure” means a structure that has the sides and roof covered with polyethylene, polyvinyl, or similar flexible synthetic material and is used to provide plants with either frost protection or increased heat retention. A temporary growing structure is not considered a building for purposes of this code.

The provisions of this code do not apply to the construction, alteration, or repair of temporary worker housing except as provided by rule adopted under Chapter 70.114A RCW or Chapter 37, Laws of 1998 (SB 6168). “Temporary worker housing” means a place, area, or piece of land where sleeping places or housing sites are provided by an employer for his or her employees or by another person, including a temporary worker housing operator, who is providing such accommodations for employees, for temporary, seasonal occupancy, and includes “labor camps” under RCW 70.54.110.

A. The following appendices of the 2015 Edition of the International Building Code are also adopted by reference: Appendix E – Supplementary Accessibility Requirements, and Appendix H – Signs.

B. The 2015 International Existing Building Code (IEBC) is included in the adoption of the International Building Code as provided by IBC Section 101.4.7 and amended in WAC 51-50-480000, including Appendix A, Guidelines for the Seismic Retrofit of Existing Buildings, excluding Chapter 1, Part 2 – Administration. The Construction Administrative Code, as set forth in Chapter 17.14 MICC, shall be used in place of IEBC Chapter 1, Part 2 – Administration.

C. The 2015 International Swimming Pool and Spa Code (ISPSC) is included in the adoption of the International Building Code as provided by IBC Section 3109.1 and amended in WAC 51-50-3109, excluding Chapter 1, Part 2 – Administration. The Construction Administrative Code, as set forth in Chapter 17.14 MICC, shall be used in place of ISPSC Chapter 1, Part 2 – Administration. The design and construction of swimming pools, spas and other aquatic recreation facilities shall comply with the ISPSC, where the facility is one of the following, except that public swimming pool barriers are regulated by WAC 246-260-031(4):

1. For the sole use of residents and invited guests at a single-family dwelling;

2. For the sole use of residents and invited guests of a duplex owned by the residents; or

3. Operated exclusively for physical therapy or rehabilitation and under the supervision of a licensed medical practitioner.

All other “water recreation facilities” as defined in RCW 70.90.110 are regulated under Chapters 246-260 and 246-262 WAC.

D. Miscellaneous.

1. Recyclable Materials, Compost, and Solid Waste Storage.

a. For the purposes of this section, the following definitions shall apply:

i. “Compost” means biodegradable solid wastes that are separated for composting such as food waste, food soiled paper and yard waste.

ii. “Recycled materials” means those solid wastes that are separated for recycling or reuse, such as papers, metals and glass.

b. All local jurisdictions shall require that space be provided for the storage of recycled materials, compost, and solid waste for all new buildings.

c. The storage area shall be designed to meet the needs of the occupancy, efficiency of pickup, and shall be available to occupants and haulers.

Exception. Group R-3 and Group U occupancies. (Ord. 16C-04 § 1; Ord. 13C-06 § 1; Ord. 10C-03 § 1; Ord. 07C-04 § 1; Ord. 04C-12 § 4).

17.01.020 Amendments and additions.

A. IBC Section 202 Amended – Definitions, High-Rise Building. Section 202 of the International Building Code is hereby amended to read as follows:

HIGH-RISE BUILDING. A building with an occupied floor or rooftop located more than 75 feet (22 860 mm) above the lowest level of fire department vehicle access.

B. IBC Section 312.1 Amended – Utility and Miscellaneous Group U, General. Section 312.1 of the International Building Code is hereby amended to read as follows:

Section 312.1 – General. Buildings and structures of an accessory character and miscellaneous structures not classified in any specific occupancy shall be constructed, equipped and maintained to conform to the requirements of this code commensurate with the fire and life hazard incidental to their occupancy. Group U shall include, but not be limited to, the following:

Agricultural buildings

Aircraft hangars, accessory to a one- or two-family residence (see Section 412.5)

Barns

Carports

Fences more than 6 feet (1,829 mm) high

Grain silos, accessory to a residential occupancy

Greenhouses

Livestock shelters

Private garages

Retaining walls

Sheds

Stables

Tanks

Towers

Waterfront structures

C. IBC Section 405.8 Amended – Underground Buildings, Standby Power. Section 405.8 of the International Building Code is hereby amended to read as follows:

Section 405.8 – Standby power. A standby power system complying with Section 2702 shall be provided for standby power loads specified in Section 405.8.1. An emergency power system complying with Section 2702 shall be provided for the emergency power loads specified in Section 405.8.1. Fuel-fired emergency generator sets and associated fuel storage, including optional generator sets, located more than 30 feet below the lowest level of exit discharge requires the approval of the Fire Code Official.

D. IBC Section 501.2 Amended – General Building Heights and Areas, General, Address Identification. Section 501.2 of the International Building Code is hereby amended to read as follows:

Section 501.2 – New and existing buildings shall be provided with approved address identification. The address identification shall be legible and placed in a position that is visible from the street or road fronting the property. Address identification characters shall contrast with their background. Address numbers shall be Arabic numbers or alphabetical letters. Numbers shall not be spelled out. Each character shall be not less than six (6) inches high with a minimum stroke width of 1/2 inch. Where required by the fire code official, address identification shall be provided in additional approved locations to facilitate emergency response. Where access is by means of a private road and the building cannot be viewed from the public way, a monument, pole or other sign or means shall be used to identify the structure. Address identification shall be maintained.

E. IBC Section 903.2 Amended – Fire Protection Systems, Automatic Sprinkler Systems, Where Required. Section 903.2 of the International Building Code is hereby amended to read as follows:

903.2 Where required. Approved automatic sprinkler systems shall be installed in all newly constructed buildings and structures with a gross floor area of 5,000 square feet or greater and shall be provided in the locations described in Sections 903.2.1 through 903.2.12.

F. IBC Section 903.3.1.2 Amended – NFPA 13R Sprinkler Systems. Section 903.3.1.2 of the International Building Code is hereby amended to read as follows:

Section 903.3.1.2 NFPA 13R sprinkler systems. Automatic sprinkler systems in one and two family dwellings shall be permitted to be installed throughout in accordance with NFPA 13R. One and two family dwellings 10,000 square feet and larger shall be installed in accordance with NFPA 13R or 13. Systems in accordance with NFPA 13R shall not be installed in R-1 or R-2 Occupancies.

G. IBC Section 903.4.3 Amended – Sprinkler System Monitoring and Alarms, Floor Control Valves. Section 903.4.3 of the International Building Code is hereby amended to read as follows:

Section 903.4.3 Floor control valves. Approved supervised indicating control valves shall be provided at the point of connection to the riser on each floor.

Exception: When approved by the Fire Code Official in NFPA 13D and NFPA 13R Systems.

H. IBC Section 907.2 Amended – Where Required – New Buildings and Structures. Section 907.2 of the International Fire Code is hereby added to read as follows:

907.2 Where required – new buildings and structures. An approved fire alarm system installed in accordance with the provisions of this code and NFPA 72 shall be provided in new buildings and structures in accordance with Sections 907.2.1 through 907.2.23. For all newly constructed buildings with a gross floor area of 3,000 or greater square feet an approved manual and automatic fire alarm system shall be installed.

Exceptions:

1. One- and two-family dwellings, Group R-3, Group R-4, and Group U Occupancies having adequate fire flow and approved access. Dwelling units shall have interconnected single station smoke detectors in accordance with RCW 48.48.140 and WAC 212-10.

2. Buildings under 10,000 square feet that are protected throughout by an approved and monitored automatic sprinkler system installed in accordance with section 903.3.1.1 unless required by other sections of this code.

The system shall provide occupant notification in accordance with Section 907.5, unless other requirements are provided by another section of this code.

A minimum of one manual fire alarm box shall be provided in an approved location to initiate a fire alarm signal for fire alarm systems employing automatic fire detectors or water-flow detection devices. Where other sections of this code allow elimination of fire alarm boxes due to sprinklers, a single fire alarm box shall be installed.

Exceptions:

1. The manual fire alarm box is not required for fire alarm systems dedicated to elevator recall control and supervisory service.

2. The manual fire alarm box is not required for Group R-2 occupancies unless required by the fire code official to provide a means for fire watch personnel to initiate an alarm during a sprinkler system impairment event. Where provided, the manual fire alarm box shall not be located in an area that is accessible to the public.

Remodels and tenant improvements. When undergoing remodel and tenant improvements, existing occupancies equipped with smoke detectors that are 10 or more years old shall have all such detectors replaced with modern units. Those occupancies without the protection of smoke detection shall add a manual and automatic fire alarm system in accordance with the applicable requirements in this section and other sections that may apply.

Additions. Additions to existing buildings shall meet the requirements of, Remodels and Tenant improvements, for the whole building and additionally provide the same coverage level to the addition as the rest of the building unless authorized by the Fire Code Official.

I. IBC Section 3112 Revised – Waterfront Structures. Section 3112 of the International Building Code is hereby added to read as follows:

SECTION 3112 – WATERFRONT STRUCTURES

Section 3112.1 General. In addition to other requirements of this code, all waterfront structures including but not limited to docks, piers, wharves, floats, mooring piles, anchor buoys, bulkheads, submerged or overhead wires, pipes, and cables, and any object passing beneath, through or over the water beyond the line of ordinary high water shall comply with the regulations of this section.

Section 3112.2 Approvals required. Before any permit for a new waterfront structure or revisions to an existing waterfront structure is issued by the building official, the applicant shall obtain prior approval from all applicable state and federal agencies.

Section 3112.3 Definitions. For the purposes of this section, certain terms are defined as follows:

BULKHEAD. A retaining wall or erosion-control structure along a waterfront.

COVERED WATERFRONT STRUCTURE. Any waterfront structure covered in whole or in part by a roof.

COVERED WATERFRONT STRUCTURE BUILDING AREA. The area lying directly beneath the portion of a structure covered by a roof.

SUBSTRUCTURE. That portion of the construction of a dock, pier, wharf or other similar waterfront structure below and including the deck.

SUPERSTRUCTURE. That portion of the construction of a dock, pier, wharf or other similar waterfront structure above the deck.

Section 3112.4 Construction Requirements. Waterfront structures shall comply with Sections 3112.4.1 through 3112.4.3.

Section 3112.4.1 Substructure. The substructure may be constructed of any materials allowed by this code. All decks shall sustain, within the limitations of this code, all dead loads plus a live load of not less than 100 pounds per square foot, assumed to act vertically. In addition to the live load requirement, all structures and every portion thereof shall be designed and constructed to resist a horizontal force of not less than 100 pounds per lineal foot acting at the deck line, in any direction.

Exception: For waterfront structures serving only a single dwelling, a live load of 40 psf may be used and a horizontal force need only be considered where applicable.

Section 3112.4.2 Superstructure. The superstructure shall be designed and constructed to sustain all dead loads, live loads, and wind loads required by this code, and shall be constructed of any materials allowed by this code, except when the building area of a covered waterfront structure exceeds 1,000 square feet the entire superstructure and deck shall be constructed of noncombustible materials or as required for Type IV-HT Construction per IBC Section 602.4.

Section 3112.4.3 Hardware. All hardware used structurally shall be of a corrosive-resistant metal such as aluminum, brass, copper, and stainless steel, or be completely protected by an approved corrosion-resistant metal, such as zinc.

J. IBC Appendix H, Section H101.3 Added – Signs, General, Conflict with Mercer Island City Code. Appendix H, Section H101.3 of the International Building Code is hereby added to read as follows:

Section H101.3, Conflict with Mercer Island City Code. If any provisions of IBC Appendix H are in conflict with any provisions of the Mercer Island City Code, the applicable provisions of the Mercer Island City Code shall govern.

(Ord. 17C-01 § 1; Ord. 16C-04 § 1; Ord. 13C-06 § 1; Ord. 10C-03 § 1; Ord. 07C-04 § 2; Ord. 04C-12 § 4).