firestop

Noun. (construction) Any of a number of materials, such foam, batting, or wooden blocks, built into the interior of a wall in order to inhibit the spread of fire, in North America most commonly taking the form of 16-inch pieces of 2x4 affixed horizontally in each of the spaces between the vertical studs within a wall.

This is an unmodified, but possibly outdated, definition from Wiktionary and used here under the Creative Commons license. Wiktionary is a great resource. If you like it too, please donate to Wikimedia.

This entry was last updated on RefTopia from its source on 3/20/2012.