IBC Design 721.1(1) 2-3.1
3-Hour Fire Rated Webs or flanges of steel beams and girders — Vermiculite gypsum plaster on a metal lath cage, wire tied…
IBC Table 721.1(1), Item 2-3.1 (Webs or flanges of steel beams and girders): protection by Vermiculite gypsum plaster on a metal lath cage, wire tied to 0.165" diameter (No. 8 B.W. gage) steel wire hangers wrapped around beam and spaced 16" on center. Metal lath ties spaced approximately 5" on center at cage sides and bottom. Minimum insulating material thickness — 3-hr: 7/8". Prescriptive protection from the adopted building code — see table footnotes for conditions.
Vermiculite gypsum plaster on a metal lath cage, wire tied to 0.165" diameter (No. 8 B.W. gage) steel wire hangers wrapped around beam and spaced 16" on center. Metal lath ties spaced approximately 5" on center at cage sides and bottom.
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