A brace, or a system of braces, placed between joists (or the like) to stiffen them, to hold them in

A flat stone providing passage over a gutter or areaway.

Said of a member (such as a joist) which is laid across parallel lines of support.

A low-voltage, twowire cable lighting system.

A low firebrick separating wall in a furnace.

A traveling overhead hoisting machine which spans fixed side rails that are part of a building structure or are erected