Inventors at work, with chapters on discovery (1906)
Iles, George, 1852-1942 · New York, Doubleday, Page & company · leaf 53
to each otherat an obtuse angle, and are fastened to the horizontal beam, BC, at B and C. Their apex,A, is joined to BC by theking-post, AK, which bindsthe three strongly and firm-ly. This whole structuremakes up a triangle, and sodoes each of its halves,ABK and AKC. No othershape built of… … King-post truss. AK, king-post. RIGIDITY OF TRIANGLES 19 push; but insert cross-pieces, AC and BD so as to divide thesquare into triangles, and at once theframe resists any strain not severeenough to break the wood or crushits fastenings. As the roof pressesdown the frame ABC, its sides, ABand AC,…
Inventions · Inventors
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