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 104
ete the parallelogram of forces ebfd; then bd, thediagonal of the parallelogram, will be the direction, and itslength, 9-25, will be the amount, of the united pressures ofA and of B, The line b d\s> termed the resultant of the twoforces bf and be, U A and B are to be supported by onepost, C, the… … Fig. 29. 81.—Another Example.—Let Fig. 29 represent a piece offraming commonly called a crane, which is used for hoist-ing heavy weights by means of the rope, B bf, which passesover a pulley at b. This, though similar to Figs. 26 and 27, is,however, still materially different. In those figures,…
Carpentry · Architecture · Building
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