Building construction and superintendence, by F.E. Kidder ... (1896)
Kidder, Frank E. (Frank Eugene), 1859-1905 · New York, W.T. Comstock · leaf 42
and strength we can have the form of truss shownin Fig. 29, and still keep the feet of the. rafters a and b from spread-ing. To do so, however, the tie c c must offer a much greater re-sistance than when it is level, and it requires great strength in thecentre tie r to keep the tie c c in position.… … Fig. Fig. 20 Fig. 30. be remembered that the part c is in tension and the part d in com-pression. If there are two purlins on each side to be supported anadditional brace and tie should be used, as shown in Fig. 30. Thisalso increases the tension in the lower part of the tie c. Very oftena…
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