The encyclopdia britannica; a dictionary of arts, sciences, literature and general information . the general design ofthe earlier timber bridges. Nowplate web girders are only usedfor spans of less^ than iQo fjt. Three types.: of bracing forthe web very early developed— the Warren type in which the bracing bars form equilateraltriangles, the Whipple Murphy in which the struts are verticaland the ties inclined, and the lattice in which both struts andties areinclined at equal angles^ usually 45° with the earliest published theoretical investigations of the stressesin bracing bars
The encyclopdia britannica; a dictionary of arts, sciences, literature and general information . the general design ofthe earlier timber bridges. Nowplate web girders are only usedfor spans of less^ than iQo fjt. Three types.: of bracing forthe web very early developed— the Warren type in which the bracing bars form equilateraltriangles, the Whipple Murphy in which the struts are verticaland the ties inclined, and the lattice in which both struts andties areinclined at equal angles^ usually 45° with the earliest published theoretical investigations of the stressesin bracing bars were perhaps those in the paper by W. T. Doyneand W. B. Blood {Proc. Inst. , 1851, xi. p. i), and the paperby J. Barton, On the economic distribution of material inthe sides of^ wrought iron beams {Proc. Inst. , 1855, xiv. P-443)- . ^ , , . The Boyne bridge, constructed by Barton m Ireland, m culated position oi one of of contrary flexure all therivets of the top boom were cut out, and by. lowering the endof the girder over the side span one indi, the joint was opened.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectencyclo, bookyear1910
