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A long thick piece of wood or metal that is used to support a floor or ceiling in a building.

  • A.Beam
  • B.Joist
  • C.Truss
  • D.Support

Answer: B

It is a joist.

A joist is one of the parallel timbers or steel members carrying a floor or ceiling. A beam is the larger member that joists rest on, and a truss is a framework supporting a roof.

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