IBC Design 721.1(2) 6-1.3
1-Hour Fire Rated Solid gypsum plaster — 3/4" by 0.055" (No. 16 carbon sheet steel gage) vertical cold-rolled…
IBC Table 721.1(2), Item 6-1.3 (Solid gypsum plaster): 3/4" by 0.055" (No. 16 carbon sheet steel gage) vertical cold-rolled channels, 16" on center with 3/8" gypsum lath applied to one face and attached with sheet metal clips. Gypsum plaster each side mixed 1:2 by weight, gypsum to sand aggregate. Minimum finished thickness (face-to-face) — 1-hr: 2 (d)". Prescriptive assembly from the adopted building code — thicknesses are code minimums, see table footnotes for conditions.
3/4" by 0.055" (No. 16 carbon sheet steel gage) vertical cold-rolled channels, 16" on center with 3/8" gypsum lath applied to one face and attached with sheet metal clips. Gypsum plaster each side mixed 1:2 by weight, gypsum to sand aggregate.
The full text is for BuildSpec members
Read the complete section, search across every adopted code, run the calculators and ask Copilot — free for 14 days, no card required.
- Layer-by-layer components with thicknesses
- Cross-section diagram
- Applicable code sections and test standard
- 6 related assemblies