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 80
se triangles into 12 equal parts, forthe rise of the roof. Then place the bevel square upon the bevel AB,at B, and set it to tke figure on the line CD, which corresponds withthe pitch of the roof. This will set the square to the bevel requiredfor the top of the brace. In this figure the bevel is… … f\ »:■, 9\ ^\ J. I \^.>, ^.^-.^ Plate 9. i»
Carpentry · Bridges
Internet Archive · UMass Dartmouth, Claire T. Carney Library · Public Domain Mark 1.0. Free to use for anything.