Structural · A-7YZFM

Cementitious Fireproofing at Steel Beam and Deck

Materials

Concrete Reinforced Concrete Steel Metal (misc.)

Elements

Beams Ceilings Floors / Slabs Decks Reinforcing

About this detail

Cementitious fireproofing is applied to a structural steel beam and metal deck supporting a reinforced concrete slab. The cementitious material is mixed with water and sprayed onto clean steel surfaces free of dirt, loose scale, and oil. The space between the steel deck and the top flange of the beam is completely filled with the fireproofing material. Density requirements are specified for different fireproofing types, including specific minimum average and individual densities for types Z-106, Z-106G, and Z-146. Application of type Z-146 to the steel deck requires the installation of expanded metal lath.

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