IBC Design 721.1(1) 1-3.1
4-Hour Fire Rated Steel columns and all of primary trusses — 4" hollow clay tile in two 2" layers; 1/2" mortar between…
IBC Table 721.1(1), Item 1-3.1 (Steel columns and all of primary trusses): protection by 4" hollow clay tile in two 2" layers; 1/2" mortar between tile and column; 3/8" metal mesh 0.046" wire diameter in horizontal joints; tile fill. Minimum insulating material thickness — 4-hr: 4". Prescriptive protection from the adopted building code — see table footnotes for conditions.
4" hollow clay tile in two 2" layers; 1/2" mortar between tile and column; 3/8" metal mesh 0.046" wire diameter in horizontal joints; tile fill.
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- Applicable code sections and test standard
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