Inventors at work, with chapters on discovery (1906)
Iles, George, 1852-1942 · New York, Doubleday, Page & company · leaf 54
post truss, its sides, AB and AC,must be of metal or wood because they will be in compression;the king-post, AK, and the base, BC, which will be under tension,may be of rubber or cord. Always as in this case the parts of atruss exposed to compression must be of rigid material.. When apart may be of… … Frames of four sides. For rigidity diagonals are needed, AC, BD. 20 FORM-BRIDGES
Inventions · Inventors
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