Structural · G-M438N

Fire Resistance Details

Materials

Elements

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Spray-applied fire-resistive material is mixed with water and applied in multiple coats to a clean structural steel tubular column. The column has minimum outside dimensions of 4 by 4 inches with wall thicknesses of 3/16 inch or 3/8 inch. The required fireproofing thickness varies from 9/16 inch to 3-9/16 inches depending on the required hourly fire resistance rating and the steel member size. Approved manufacturers and specific product types provide the classified fire resistance ratings in accordance with ANSI/UL 263 Design No. X752.

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