General

booster heater

An auxiliary water heater which is installed in the hot-water piping system to provide additional heat in one part of […]

General

booster fan

An auxiliary fan which increases the air pressure in a system; used to provide additional capability to handle peak exhaust

General

boom hoist

A hoist which has a spar attached to a mast; used to lift and move a load.

General

boom

1. A cantilevered or projecting structural member (such as a beam or spar) which is used to support, hoist, or

General

bonus clause

In a construction contract, a provision that permits a bonus payment, by the owner to the contractor, for early completion

General

bonus-and-penalty clause

A provision in the construction contract for payment of a bonus to the contractor for completing the work, 1 prior

General

boning in

(Brit.) In surveying, locating and driving pegs in the ground so that their tops are in a line marking a

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