Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 503
ers refer to the same parts inall the figures. T T are the tie-heams, R R the mai% rafters, r r the jack-raf-ters, P P the plates, p p the pmrlins, K K the king-posts, k k king-bolts, q qqueen-holts—both are called suspension-lolts—C the collar or straining learn,B B braces or struts, b b… … Fig. 1150. the ridge above the plate is ^, J, f, etc., of the span of the roof at the level ofthe plate. The steeper the pitch of the roof, the less the thrust against the
Mechanical drawing
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