Firestops are required by the codes when a higher degree of fire protection is required, particularly when penetrations through fire resistance rated assemblies are to be protected with a specific assemblage of materials that have been tested under severe fire conditions for a prescribed period of time.

Where is firestop required?

Where is firestopping required? Through Penetrations: Breaches in both sides of a floor, floor-ceiling or wall assembly to accommodate an item passing through the breaches.

What is the purpose of firestop?

Firestops are physical barriers designed to prevent the spread of flames, deadly gases and toxic smoke through openings created during building upgrades and the installation of electrical, communications, plumbing, and ventilation systems, as well as grease ducts.