Old 06-02-03, 09:18 AM
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Lightbulb Fireblocking

Is the purpose of fireblocking as simple as its name implies? One of the code requirements for my finishing my basement is to provide fireblocking around the floor/ceiling and around soffits. Does the top and\or sole plates not take care of this? I'm trying to picture where around the soffit(s) the fireblocking would go but I can't quite picture it . . . Thanks.
Old 06-02-03, 09:59 AM
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The purpose of fireblocking is a simple as the name implies - to block the rapid progress of fire. Codes can be quite specific as to what and where it is placed.

You might ask someone more familiar with your local codes about the specifics.
Old 06-02-03, 04:16 PM
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The best way to explain fire blocking is this description. Lets say you have a wall build out of 2x4's, 16" on center. About 12" down from the top, you cut a piece of 2x4 that fits between two of the studs. 14 1/2" long and nail this horizonally between the two studs. Now if fire were running up a wall from below, that cross piece you put in, would stop the fire at that board. It would burn through in time but stop the fire in time to usually be put it out.
Hope this helps.
Old 06-03-03, 12:48 AM
bungalow jeff
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As Jack posted, the fire would burn and damage localized studs and fireblocks without reaching the next framing level above, greatly reducing the risk of floor collapse.

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