(Effective until July 1, 2023)

PDFWAC 51-50-0508

Section 508—Mixed use and occupancy.

508.4.4.1 Construction. Required separations shall be fire barriers constructed in accordance with Section 707 or horizontal assemblies constructed in accordance with Section 711, or both, so as to completely separate adjacent occupancies. Mass timber elements serving as fire barriers or horizontal assemblies to separate occupancies in Type IV-B or IV-C construction shall be separated from the interior of the building with an approved thermal barrier consisting of a minimum of 1/2 inch (12.7 mm) gypsum board or a material that is tested in accordance with and meets the acceptance criteria of both the Temperature Transmission Fire Test and the Integrity Fire Test of NFPA 275.
[Statutory Authority: RCW 19.27.031 and 19.27.074. WSR 19-02-038, § 51-50-0508, filed 12/26/18, effective 7/1/19.]
(Effective July 1, 2023)

PDFWAC 51-50-0508

Section 508—Mixed use and occupancy.

508.5.1 Limitations. The following shall apply to live/work areas:
1. The live/work unit is permitted to be not greater than 3,000 square feet (279 m) in area.
2. The nonresidential area is permitted to be not more than 50 percent of the area of each live/work unit.
3. The nonresidential area function shall be limited to the first or main floor only of the live/work unit.
[Statutory Authority: RCW 19.27.031 and 19.27.074. WSR 22-13-094, § 51-50-0508, filed 6/14/22, effective 7/1/23; WSR 19-02-038, § 51-50-0508, filed 12/26/18, effective 7/1/19.]