box nail
A nail similar to a common nail but thinner; has a long shank which may be smooth or barbed.
General
General
box mullion
The built-up mullion of a cased frame of a double-hung window; has hollow jambs containing the counterweights.
General
boxing shutter, folding shutter
A window shutter which can be folded into the boxing or recess at the side.
General
box-head window
A window constructed so that the sashes can slide vertically up into the head or above it) to provide maximum
General
box gutter
A rectangularly shaped wood gutter that is set into and partially below the lower edge of a roof; usually lined