IBC Design 721.1(3) 13-1.3

1-Hour Fire Rated Double wood floor over wood joists spaced 16" on… — Perlite or vermiculite gypsum plaster on…

IBC Table 721.1(3), Item 13-1.3: Double wood floor over wood joists spaced 16" on center.. Ceiling: Perlite or vermiculite gypsum plaster on metal lath secured to joists with 1-1/2" by No. 11 gage by 7/16" head barbed shank roofing nails spaced 5" on center. Minimum ceiling thickness — 1-hr: 5/8". Prescriptive assembly from the adopted building code — see table footnotes for conditions.

Double wood floor over wood joists spaced 16" on center.. Ceiling: Perlite or vermiculite gypsum plaster on metal lath secured to joists with 1-1/2" by No. 11 gage by 7/16" head barbed shank roofing nails spaced 5" on center. Minimum ceiling thickness — 1-hr: 5/8".

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