bar mat
A network of steel reinforcing bars assembled in two or more layers and welded or tied together.
General
General
barn-door hanger
A hanger for an exterior sliding door; consists of a frame which moves along a horizontal track, supported by rollers.
General
barn-door stay
A small wheel which rolls along a horizontal track and guides the movement of a barn door.
General
barn raising
In the United States before the 20th century, a cooperative effort in which the elements of the framework for a
General
barometric damper
An automatic adjustable device for regulating the draft through a fuelburning appliance, thereby making operation of the appliance nearly independent
General
barometric draft regulator
A damper usually installed in the breeching between a boiler and chimney; permits air to enter the breeching automatically as