IBC Design 721.1(2) 15-1.3
1-Hour Fire Rated Exterior or interior walls — 2" x 4" wood studs 16" on center with 7/8" cement plaster (measured…
IBC Table 721.1(2), Item 15-1.3 (l, m) (Exterior or interior walls): 2" x 4" wood studs 16" on center with 7/8" cement plaster (measured from the face of studs) on the exterior surface with interior surface treatment as required for interior wood stud partitions in this table. Plaster mix 1:4 for scratch coat and 1:5 for brown coat, by volume, cement to sand. Minimum finished thickness (face-to-face) — 1-hr: Varies". Prescriptive assembly from the adopted building code — thicknesses are code minimums, see table footnotes for conditions.
2" x 4" wood studs 16" on center with 7/8" cement plaster (measured from the face of studs) on the exterior surface with interior surface treatment as required for interior wood stud partitions in this table. Plaster mix 1:4 for scratch coat and 1:5 for brown coat, by volume, cement to sand.
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- Layer-by-layer components with thicknesses
- Cross-section diagram
- Applicable code sections and test standard
- 6 related assemblies