The American house carpenter: a treatise upon architecture, cornices and mouldings, framing, doors, windows and stairs. Together with the most important principles of practical geometry (1852)
Hatfield, R. G. (Robert Griffith), 1815-1879 · New York, J. Wiley · leaf 166
s, or fioor-joists, are disposed as is shown inFig. 200. Where strength is the principal object, this mannerof disposing the fioor-joists is far preferable ; as experiments haveproved that, with the same quantity of material, single-joistedfloors are much stronger than either double or framed… … Fig. 20a 12 inches. Rule.—Divide the square of the length in feet, bythe breadth in inches; and the cube-root of the quotient, multi-pUed by 2-2 for pine, or 2*3 for oak, will give the depth in inches.Example.—What should be the depth of floor-joists, having abearing of 12 feet and a thickness of 3…
Carpentry · Architecture
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