McMaster, John Bach, 1852-1932, Making of America Project · New York, D. Van Nostrand · leaf 60
composing such a frame, and their necessarydimensions may be computed with easeby the method just explained. It should,however, be remembered that beamswhich are to be notched must have theirdimensions increased beyond those givenby calculation, in as much as notchingwill, even when not very deep,… … CO 56 and two inclined braces which meetthere, and make no allowance for theresistance of the horizontal beam. The third and fourth systems of arranging the principal pieces, afford analmost unlimited number of designs forcentre ribs, which are especially worthyof notice, in that they are…
Bridges · Tunneling
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