IBC Design 721.1(3) 6-2.1

3-Hour Fire Rated Steel joists constructed with a poured reinforced… — Vermiculite gypsum plaster on metal lath…

IBC Table 721.1(3), Item 6-2.1: Steel joists constructed with a poured reinforced concrete slab on metal lath forms or steel form units.. Ceiling: Vermiculite gypsum plaster on metal lath attached to the bottom chord with single No. 16 gage or doubled 0.049-inch (No. 18 B.W. gage) wire ties 6" on center. Minimum slab thickness — 3-hr: 2". Minimum ceiling thickness — 3-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: Vermiculite gypsum plaster on metal lath attached to the bottom chord with single No. 16 gage or doubled 0.049-inch (No. 18 B.W. gage) wire ties 6" on center.

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  • Layer-by-layer components with thicknesses
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  • Applicable code sections and test standard
  • 6 related assemblies
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