Architecture. a monolithic reinforced-concrete structure having walls and floors in the form of slabs.
Building Trades. a window frame with pockets for sash weights.
True Tales of Arctic Heroism in the New World Adolphus W. Greely
box beam. Historical Examples The Boy Scouts of the Air in Indian Land Gordon Stuart noun a girder that is hollow and square or rectangular in shape (as modifier): a box-girder bridge Also called box beam
a gutter set into the slope of a roof above the cornice.
to put (a square-rigged sailing vessel) on a new tack by bracing the head yards aback and backing onto the new heading. Historical Examples The Flying Bo’sun Arthur Mason verb (nautical) to bring (a square-rigger) onto a new tack by backwinding the foresails and steering hard round
a heading, usually atthe top of a page, newspaper column, or column of figures, enclosed in a box formed by rules.