WAC 51-50-0706. Section 706 — Fire walls

706.3 Materials. Fire walls that separate a building of Type I or II construction from a building of any construction type shall be of any approved noncombustible materials. Other fire walls shall be built of materials consistent with the types permitted for the type of construction of the building. 706.4 Fire-resistance rating. Fire walls shall have a fire-resistance rating of not less than that required by Table 706.4. Table 706.4 Fire Wall Fire-resistance Ratings GROUP FIRE-RESISTANCE RATING (hours) A, B, E, H-4, I, R-1, R-2, U 3 a F-1, H-3 b , H-5, M, S-1 3 H-1, H-2 4 b F-2, S-2, R-3, R-4 2 GROUP FIRE-RESISTANCE RATING (hours) A, B, E, H-4, I, R-1, R-2, U 3 a F-1, H-3 b , H-5, M, S-1 3 H-1, H-2 4 b F-2, S-2, R-3, R-4 2 a In Type II, III, IV, or V construction, walls shall be permitted to have a 2-hour fire-resistance rating. b For Group H-1, H-2, or H-3 buildings, also see Sections 415.7 and 415.8. a In Type II, III, IV, or V construction, walls shall be permitted to have a 2-hour fire-resistance rating. b For Group H-1, H-2, or H-3 buildings, also see Sections 415.7 and 415.8.