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[fahyuh r-stop] /ˈfaɪərˌstɒp/
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.
Origin of firestop
1895-1900; Americanism; fire + stop Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for firestop
  • firestop has had a dramatic effect in reducing the damage done by children who set fires.
  • All firestop materials and devices shall be from a single manufacturer.
  • These penetrations should be protected with listed through-penetration firestop systems such as caulk or pillows.
  • Seal penetrations with listed through-penetration firestop materials.
  • Specialize in fastening systems and firestop products.

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