Carpentry made easy, or, The science and art of framing, on a new and improved system : with specific instructions for building balloon frames, barn frames, mill frames, warehouses, church spires, etc., comprising also a system of bridge building, with bills, estimates of cost, and valuable tables ... (1857)
Bell, William E · Philadelphia : Howard Challen · leaf 131
rttr-.l..ml..r!l.C5TO.Il„b PLATE 22. Fig. 1 represents a bent of a very strong roof, designed for machineshops and other buildings, where it is necessary for great weights orheavy machinery to be supported by them. The Author of this workhas superintended the construction of roofs of this kind upon…
Carpentry · Bridges
Internet Archive · UMass Dartmouth, Claire T. Carney Library · Public Domain Mark 1.0. Free to use for anything.