Horizontal board nailed to posts set at the corners of an excavation to indicate the level wanted; fastening posts for stretched strings to indicate the outlines of foundation walls.
Batter brace
Angled support that is close to the end of a truss.
Batteries
Battery
An energy storage device composed of one or more electrolyte cells.
Battery energy efficiency storage
Energy storage using electrochemical batteries. The three main applications for battery energy storage systems include spinning reserve at generating stations, load leveling at substations, and peak shaving on the customer side of the meter.
Battery of fixtures
Plumbing fixtures all discharging into a common waste line.
Battery pack
A battery pack consists of two or more cells and determines the power or voltage rating of a tool. A screwdriver with a two-cell pack develops 2.4 Volts, while a drill-driver with eight cells develops 9.6 Volts.
Battleships
Metal strips that are used to fasten electrical switches and receptacles in old work where there is no other hardware to keep the box from falling out of the wall. Battleships are technically known as Madison clips but have a profile that resembles a battleship.
Bauhaus style
Houses in this German style of architecture had no decoration and were smooth white blocks constructed of steel, reinforced concrete with integral walls of glass.
Bay
Space formed by the opening between two walls or columns.
