| 摘要 |
A poke-through fire barrier with knock-out fire barrier openings. The structure includes a fire barrier element which is constituted from an intumescent material in the shape of a disc member which is adapted to be installed in a passage or opening formed in a fire-rated floor, and wherein the intumescent disc member incorporates one or more knock-outs for the passage therethrough of insulated conductors or wires.
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