ceiling joist

1 definition found

ceiling joist - Collaborative International Dictionary of English v.0.48 :

  Joist \Joist\ (joist), n. [OE. giste, OF. giste, F. g[^i]te, fr.
     gesir to lie, F. g['e]sir. See Gist.] (Arch.)
     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.
     [1913 Webster]