joist definition

  • noun:
    • the timber, metallic, or concrete beams set parallel from wall to wall or across or abutting girders to aid a floor or roof.
    • some timber laid horizontally, or almost so, to which the planks of the flooring, or even the laths or furring strips of a ceiling, tend to be nailed. Known as, according to its place or use, binding joist, bridging joist, ceiling joist, cutting joist, etc.
    • some timber set horizontally, or almost so, that the planks associated with floor, or even the laths or furring pieces of a ceiling, are nailed; -- known as, according to its position or use, binding joist, bridging joist, ceiling joist, trimming joist, etc. See Illust. of Double-framed floor, under two fold, a.
    • In building, one of the pieces of timber that the boards of a floor and/or laths of a ceiling are nailed, and which by themselves rest regarding the walls or on girders, and sometimes on both. Joists tend to be laid horizontally in synchronous equidistant rows.
    • beam familiar with support floors or roofs
  • verb-transitive:
    • to create with joists.
    • to match or provide with joists.
  • verb:
    • To fit or provide with joists.
  • others:
    • to match or furnish with joists.

Related Sources

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  • Hyponym for "joist"
  • Cross Reference for "joist"
  • Urban Dictionary for "joist"
    • To ram the other person. Usually…
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