joist [jȯist]
One of a series of parallel beams of timber, reinforced concrete, or steel used to support floor and ceiling loads, and supported in turn by larger beams, girders, or bearing walls; the widest dimension is vertically oriented. Also see binding joist, boarding joist, bridging joist, ceiling joist, common joist, floor joist, principal joist, sleeper joist.
(civil engineering)
A steel or wood beam providing direct support for a floor.
joist
joists in a flooring system
joist
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