Dictionary
Styles
Pritzker
RIBA
References
CAD Scale Factors
AIA Numbering System
CMU Block Sizes
Dictionary
Styles
Pritzker
RIBA
CAD Scale Factors
AIA Numbering System
CMU Block Sizes
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collar beam
Nominal 1- or 2-inch-thick members connecting opposite roof rafters. They serve to stiffen the roof structure.
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