. Details of railroad girder bridges . j-o .^o do 70 (So 9o /oo //o /SO ^-a.^>C\\S^B ^-^iKSXT ^A^VW?- \ \ \ c-S);^\a6. <^^vsA^\ ^\ s^o^.Vs. f o 0 o i I 0 cic>N 9 OS. Fl-A TET a O/AGRAM 0/=^ i^^/GHTJ 001/3LB TRACK G/RDER BR I OSES \ 34- / ^ / / ^1 / / ^ / / I S / / ^ ^ ,0/ / > ^ / J r I / Z. <zr?gFe<z. f ■ /o 20 30 40 SO 60 70 so 90 /ffO //^ C .^^^Ha, \ \ \ 1 \ \ \ \ \ \ \ \ \ oco \ A X X ^^Sv[ ^^^^ ^ 3^ She variations in the \79ights of similar structuresconstructed by different railroads may be accounted for asnoted in the folloi^-ing. A variation in the ratio of d
. Details of railroad girder bridges . j-o .^o do 70 (So 9o /oo //o /SO ^-a.^>C\\S^B ^-^iKSXT ^A^VW?- \ \ \ c-S);^\a6. <^^vsA^\ ^\ s^o^.Vs. f o 0 o i I 0 cic>N 9 OS. Fl-A TET a O/AGRAM 0/=^ i^^/GHTJ 001/3LB TRACK G/RDER BR I OSES \ 34- / ^ / / ^1 / / ^ / / I S / / ^ ^ ,0/ / > ^ / J r I / Z. <zr?gFe<z. f ■ /o 20 30 40 SO 60 70 so 90 /ffO //^ C .^^^Ha, \ \ \ 1 \ \ \ \ \ \ \ \ \ oco \ A X X ^^Sv[ ^^^^ ^ 3^ She variations in the \79ights of similar structuresconstructed by different railroads may be accounted for asnoted in the folloi^-ing. A variation in the ratio of depthto length will cause a difference in weight. If the spac-ing, center to center of girders, varies for bridges of thesame length, there will be a variation in the weights of thestructures. The variations given have been spoken of indetail. Specifications differ as to unit stresses and theuse of medium or soft steel. There will, however, be onlya slighL difference in weight caused by the difference inspecifications if the same loading is used in the design. X. THE LONGEST PLATE GrlRDER SPAN IM AiMERICA. V/ith the exception of the 170-fo
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Keywords: ., bookcentury1900, bookdecade1900, booksubjecttheses, bookyear1906
