23.07.110 TABLE R602.10.3(3) AND SECTION R602.10.4.5 PROHIBIT THE USE OF GYPSUM BOARD AND LIMIT THE USE OF PORTLAND CEMENT PLASTER AS PRESCRIPTIVE WALL BRACING MATERIALS IN SEISMIC DESIGN CATEGORIES D0, D1 AND D2 AMENDED.

1. Chapter 6 (Wall Construction) Table R602.10.3(3) (Bracing Requirements Based on Seismic Design Category) is amended as follows:

1.1 The title of Table R602.10.3(3) is amended to read:

TABLE R602.10.3(3)i, j

1.2 Footnotes "i" and "j" are added to Table R602.10.3(3), to read:

i. Methods PBS, HPS, SFB and CS-SFB are not permitted in Seismic Design Categories D0, D1, and D2.

j. Methods GB, DWB and PCP are not permitted in Seismic Design Categories D0, D1, and D2 where S1 is greater than or equal to 0.75.

2. Add a new subsection R602.10.4.5, to read:

R602.10.4.5 Limits on methods GB and PCP. In Seismic Design Categories D₀, D₁, and D₂, Method GB is not permitted for use as intermittent braced wall panels, but gypsum board is permitted to be installed when required by this section to be placed on the opposite side of the studs from other types of braced wall panel sheathing. In Seismic Design Categories D₀, D₁, and D₂, the use of Method PCP is limited to one-story single-family dwellings and accessory structures.