IBC Design 721.1(3) 6-3.1
1-Hour Fire Rated Steel joists constructed with a poured reinforced… — Cement plaster over metal lath attached to…
IBC Table 721.1(3), Item 6-3.1: Steel joists constructed with a poured reinforced concrete slab on metal lath forms or steel form units.. Ceiling: Cement plaster over metal lath attached to the bottom chord of joists with single No. 16 gage or doubled 0.049" (No. 18 B.W. gage) wire ties spaced 6" on center. Plaster mixed 1:2 for scratch coat, 1:3 for brown coat for 1-hour system and 1:1 for scratch coat, 1:1-1/2 for brown coat for 2-hour system, by weight, cement to sand. Minimum slab thickness — 1-hr: 2". Minimum ceiling thickness — 1-hr: 5/8". Prescriptive assembly from the adopted building code — see table footnotes for conditions.
Steel joists constructed with a poured reinforced concrete slab on metal lath forms or steel form units.. Ceiling: Cement plaster over metal lath attached to the bottom chord of joists with single No. 16 gage or doubled 0.049" (No. 18 B.W. gage) wire ties spaced 6" on center. Plaster mixed 1:2 for…
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- Layer-by-layer components with thicknesses
- Cross-section diagram
- Applicable code sections and test standard
- 6 related assemblies