A firestop is a fire protection system made of various components used to seal openings and joints in fire-resistance rated wall and/or floor assemblies. Firestops are designed to restore the fire-resistance ratings of wall and/or floor assemblies by impeding the spread of fire by filling the openings with fire-resistant materials. Unprotected ope...
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http://en.wikipedia.org/wiki/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.
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https://www.infoplease.com/dictionary/firestop
No exact match found.
