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The builder's practical director; or, Buildings for all classes, containing plans, sections and elevations for the erection of cottages, villas, farm buildings, dispensaries, public schools, &c., with detailed estimates, quantities, prices, &c. .. (1855)

Leipzig, Dresden : A. H. Payne; [etc., etc.] · leaf 170

An illustration from The builder's practical director; or, Buildings for all classes, containing plans, sections and elevations for the erection of cottages, villas, farm buildings, dispensaries, public schools, &c., with detailed estimates, quantities, prices, &c. .., 1855, leaf 170
f 12,000 lbs. in the centi-e ; the distance between the supports being 20 feet, thewidth of the beam to be nine inches. The strain to be one-lialf. One-half tabular value 200Width of beam 9 1800 133 indies gives a squareroot of llVi inches, the depthof the beam. 12.000 weiglit in lbs20 distance in… … PLAN OF SECOND FLOOR STRENGTH OF MATERIALS. 81 To find the breadth of a beam, the depth, length of bearing, and weight to be supportedbeing given. Rule. — JVIuhiply the kuigtli in feet, by tlic weight in pounds; divide the produet by tiictabidar niunber multiplied by the S(juare of the depth, and…

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