barrel roof, barrel shell roof
1. A roof of semicylindrical section; capable of spanning long distances parallel to the axis of the cylinder. 2.A barrel […]
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bar-type grating
An open grid assembly of metal bars in which the bearing bars (running in one direction) are spaced by rigid
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barrel vault, barrel roof, cradle vault, tunnel vault, wagonhead vault, wagon vault
A masonry vault of plain, semicircular cross section, supported by parallel walls or arcades and adapted to longitudinal areas.
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barrier fort
1. One of a number of mutuallysupporting medieval forts which protect a large area of the countryside. 2. A fort
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barrier-free environment
As specified in the Americans with Disabilities Act, an environment containing no barriers, 2.