ALL meanings of firestop
fire·stop
F f - noun firestop (construction) A fire block. 1
- noun firestop any object built into a building frame to block a concealed hollow space through which a fire might pass from one part of the building to another. 1
- noun firestop (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. 0