joist
Speech parts
1. joist - Noun
2. joist - Verb
Meaning
A piece of timber laid horizontally, or nearly so, to which the planks of the floor, or the laths or furring strips of a ceiling, are nailed; -- called, according to its position or use, binding joist, bridging joist, ceiling joist, trimming joist, etc. See Illust. of Double-framed floor, under Double, a.
To fit or furnish with joists.
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Examples
Add a two-by-four joist hanger to the exact center of your ledger board.
The bomb blew down his house, and a joist pinned him by the legs, in full view of the Jesuit mission house across the way and of the people hurrying along the street.
Or you need to install a true junction box for a wired light and make sure it is attached to a ceiling joist or use a ceiling fan brace kit.
The junction box will have holes inside to allow you to screw it onto a joist, rafter, or other sturdy wood section of your house.