Fire Protection · F-G6T9S

*Bearing The Ul Classification Marking

Materials

Concrete Reinforced Concrete Steel Masonry / CMU Metal (misc.)

Elements

Walls Floors / Slabs Anchors / Embeds Reinforcing Roof / Floor Openings

About this detail

System No. C-AJ-1278 provides a three-hour fire rating for a floor or wall assembly constructed of minimum four-and-a-half-inch thick reinforced lightweight or normal weight concrete or UL-classified concrete blocks with a maximum opening diameter of thirty and seven-eighths inches. A single metallic pipe or conduit penetrant is installed concentrically or eccentrically within the opening, leaving an annular space between zero and seven-eighths of an inch wide that must be rigidly supported on both sides of the assembly. Permissible penetrants include up to thirty-inch diameter schedule 10 steel pipe, six-inch diameter regular copper pipe, six-inch diameter type L copper tubing, six-inch steel conduit, or four-inch steel electrical metallic tubing. The annular space is filled with a minimum one-half-inch thickness of firestop sealant applied flush with the top surface of the floor or both surfaces of the wall. At any point contact location between the pipe and concrete, a minimum one-quarter-inch diameter bead of sealant is applied at the interface on the top surface of the floor and on both surfaces of the wall.

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