firestop

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English[edit]

Combination firestop sample with multiple penetrants using firestop mortar.
Firestops as seen from underneath, of two types for three pipe penetrations.

Alternative forms[edit]

Etymology[edit]

fire +‎ stop

Noun[edit]

firestop ‎(plural firestops)

  1. (construction) A fire block.
  2. (construction) Any multi-component system designed to stop fire and smoke from migrating through openings around piping, wiring, ductwork, cable trays, bus ducts, etc., as well as through movement joints in walls and floors that are required to have a fire-resistance rating.

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