vt to fit or furnish with joists.
2. joist ·noun 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, ·adj.