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 69
bending by itsown weight, it is suspended from the head of the principalsby a king post of wood or iron. The lower part of the kingpost affords abutments for struts supporting the principalsimmediately under the purlins, so that no cross strain is ex-erted on any of the timbers in the truss, but… … ART OF BUILDING. 65 Fig. 51.
Building
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