Inventors at work, with chapters on discovery (1906)
Iles, George, 1852-1942 · New York, Doubleday, Page & company · leaf 56
its rafters. We see its roof sustained bytimbers disposed as DCMH,to avoid the undue weightnecessary for a design re-sembling that of our firstroof, ABC. Instead of oneupright post, AK, as in thatcase, we have now two, DEand HO, called queen-posts, sustaining the hori-zontal beam, CM. Inlarge… … Queen-post truss.DE, HO, queen-posts.
Inventions · Inventors
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