Rudiments of the art of building : represented in five sections [...] for the use of architects, builders, draghtsmen, machinists, engineers and mechanics (1853)
Bullock, John · New York : Stringer & Townsend · leaf 77
ART OF BUILDING. t3 65. The essential parts of each truss are, a pair of princi-pals connected by a collar or wind learn, and two hamrmrbeams^ with queen posts over them, the whole forming threetriangles, which, if not secured in their relative positions,otherwise than by the mere transverse…
Building
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