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actual weight adopted amount arched rib bars bending bowstring girder Boyne Viaduct cantilever bridge cent centre compression member consequently continuous girder cross girders secured dead load deflection diagonals Division double line driving wheels economic depth effect engine equal flanges of main foot run girders and bracing girders of special girders with cross greater hence horizontal bracing increase independent girder instance iron required lattice girder leading wheels length limiting span line of railway load per foot long-span bridges lower flanges maximum metal required mixed load Multiple normal load obtained piers plate girders practical proportion rails rolling load secured to lower Span in feet stiffening girder straight-link girder strain in cwts strain per square strength structure suspension bridge theoretical three main girders ton per foot tons per foot trailing wheels Type 2.—Lattice Girders unit strain varying vertical viaduct weight of iron weight per foot wheel base whilst
156. oldal - ... contemplate the extremes to which men are carried, now by the one and now by the other. As from antagonist physical forces, as from antagonist emotions in each man, so from the antagonist social tendencies men's emotions create, there always results, not a medium state, but a rhythm between opposite states. The one force or tendency is not continuously counterbalanced by the other force or tendency ; but now the one greatly predominates, and presently by reaction there comes a predominance of...
iii. oldal - Long-Span Railway Bridges, comprising Investigations of the Comparative Theoretical and Practical Advantages of the various adopted or proposed Type Systems of Construction, with numerous Formulae and Tables giving the weight of Iron or Steel required in Bridges from 300 feet to the limiting Spans ; to which are added similar Investigations and Tables relating to Short-span Railway Bridges. Second and revised edition. By B. BAKER, Assoc. Inst. CE Plates, crown 8vo, cloth, 5*.
118. oldal - Where the two lines of railway are supported upon three main girders, the above loads may be reduced by 2 cwt.