. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . nd this shows two towers supportinghorizontal girders each somewhat re-sembling the upright stem of the letterT,. with an evenly balanced crosspieceon top. In the diagram. A and Z arethe shore ends or abutments of thebridge, 5 and F are the tops of thetowers or piers, and C X is the suspend-ed or connecting girder in the this case the cantilevers are the 354 RMLWAV AND LOCOMOTIVE ENGINEERING Aus^ust, 1906. girders BC and X Y. They are thesloping levers from which this style ofbridge
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . nd this shows two towers supportinghorizontal girders each somewhat re-sembling the upright stem of the letterT,. with an evenly balanced crosspieceon top. In the diagram. A and Z arethe shore ends or abutments of thebridge, 5 and F are the tops of thetowers or piers, and C X is the suspend-ed or connecting girder in the this case the cantilevers are the 354 RMLWAV AND LOCOMOTIVE ENGINEERING Aus^ust, 1906. girders BC and X Y. They are thesloping levers from which this style ofbridge takes its class name. With abridge of this form it is evident thatany load borne between A and B or be-tween 5 and Z will cause a downwardpressure upon the shore ends A and Zand also ;ipon the piers B and Y. rcction, no supporting false work isneeded. When each T has been builtand the shore ends of the trusses havebeen anchored down, the suspensiontruss in the center is built out from eachcantilever and connected above mid-stream without support from below. Acantilever bridge might be built with-. SKELETON VIEW TYPICAL CANTILEVER IIRIDCF. As the load moves out onto eitherof the cantilevers, B C, or X Y. the re-sultant pressures change, so that al-though the thrust at B and ) are stilldownward, those at A and Z are nowupward, and are resisted by an anchor-age system which ties the shore endsof the bridge down firmly to the abut-ments. The general form anchorageis shown in Fig. 2. A load any-where on the connecting spanC X is carried in due proportionto the cantilevers. and produces3 downward pressure upon the piers andan upward pull at the abutments. Theconstruction of the bridge is such thata load placed anywhere on the trussX Z does not produce any effect on thetruss A C, and vice versa, because eachgirder is. so to speak, self contained andis capable of fully sustaining its ownload. The girders are usually madewith some form of sliding connectionat C and A, so that the e
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901
