The American house carpenter. A treatise on the art of building. Comprising styles of architecture, strength of materials, and the theory and practice of the construction of floors, framed girders, roof trusses, rolled-iron beams, tubular-iron girders, cast-iron girders, stairs, doors, windows, mouldings, and cornices; together with a compend of mathematics. A manual for the practical use of architects, carpenters, stair-builders, and others (1880)
Hatfield, R. G. (Robert Griffith), 1815-1879, Hatfield, O. P., ed · New York, J. Wiley & sons · leaf 111
heir feet bythe abutments in the tie-beam. This case is similar to thelast; for it is obvious that each beam is in precisely theposition of the beam in Fig. 32. The horizontal pressures atB, being equal and opposite, balance one another; and theirhorizontal thrusts at the tie-beam are also equal.… … FiG. 33. ity is at the middle of its length, is exactly equal to theweight distributed uniformly over its surface. In shed or lean-to roofs, as Fig. 32, the horizontal pressurewill be entirely remov^ed if the bearings of the rafters, as Aand B {Fig. 34), are made horizontal—provided, however,
Carpentry · Architecture · Building
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