bolster
1. A short horizontal timber or steel member placed on top of a column to support and decrease the span of beams […]
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bond header
In masonry, a bondstone that extends the full thickness of the wall; also called a throughstone.
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book matching, herringbone matching
The assembling of wood veneers from the same flitch so that successive sheets are alternated face up and face down. In figured
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booster pump
An auxiliary pump which is used in a piping system to increase or maintain the pressure in the system.
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bonnet roof
A roof having a double slope on all four sides, the lower slope being less steep than the upper slope; often extends