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 66
Double flooring. In douUe-frar: d floorings the binders, instead of restingin the walls, ar j supported on girders^ as shown in fig. 43.Single flooring is, in many respects, inferior to double floor- Fig. 43. … Double-framed flooring. ing, being liable to sag^ or deflect, so as to make the floorconcave ; and the vibration of the joists occasions injury tothe ceilings, and also shakes the walls. In double flooringthe stiffness of the binders and girders prevents both deflectionand vibration, and the floors…
Building
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