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:
Aircraft hangars, accessory to a one- or two-family residence (see Section 412.5)
Communication equipment structures with a gross floor area of less than 1500 square feet (139 square meters)
Fences more than 6 feet (1,829 mm) high
Grain silos, accessory to a residential occupancy
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 502.1 Amended – General Building Heights and Areas, General, Address Identification. Section 502.1 of the International Building Code is hereby amended to read as follows:
Section 502.1 – 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.
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.
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 1608.1 Amended – Snow Loads – General. Section 1608.1 of the International Building Code is hereby amended to read as follows:
1608.1 Snow Loads – General. Design snow loads shall be determined in accordance with Chapter 7 of ASCE 7, but the design roof load shall not be less than that determined by Section 1607. Furthermore, the design roof snow load shall not be less than 25 pounds per square feet. When using this design roof snow load it will be left to the engineer’s judgment whether to consider drift or sliding snow. However, the engineer shall consider a rain on snow surcharge of at least 5 pounds per square feet for roof slopes less than 5 degrees.
J. 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.
K. 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. 21C-01 § 1 (Exh. A); Ord. 17C-01 § 1; Ord. 16C-04 § 1; Ord. 13C-06 § 1; Ord. 10C-03 § 1; Ord. 07C-04 § 2; Ord. 04C-12 § 4).