IBC Design 721.1(1) 4-1.2

4-Hour Fire Rated Bonded or unbonded post-tensioned tendons in prestressed concrete — Carbonate, lightweight, sand-lightweight and siliceous…

IBC Table 721.1(1), Item 4-1.2 (Bonded or unbonded post-tensioned tendons in prestressed concrete): protection by Carbonate, lightweight, sand-lightweight and siliceous aggregate. Restrained members:Beams and girders-- greater than 12" wide Minimum insulating material thickness — 4-hr: 2" · 3-hr: 1-3/4" · 2-hr: 1-1/2". Prescriptive protection from the adopted building code — see table footnotes for conditions.

Carbonate, lightweight, sand-lightweight and siliceous aggregate. Restrained members:Beams and girders-- greater than 12" wide

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