. Iron truss bridges for railroads. Methods of calculating strains, with a comparison of the most prominent truss bridges, and new formulas for bridge computations; . heformula we obtain the following: ■ 18000, 84 IRON TRUSS BRIDGES FOR RAILROADS. Tensions. NAME. LENGTH. STRAIN. riVE TIMES THESTEAIN. LBS. or ■WKOUGHT-lEON. Botto « « <cCoUB m aeoTnent to 12 5
. Iron truss bridges for railroads. Methods of calculating strains, with a comparison of the most prominent truss bridges, and new formulas for bridge computations; . heformula we obtain the following: ■ 18000, 84 IRON TRUSS BRIDGES FOR RAILROADS. Tensions. NAME. LENGTH. STRAIN. riVE TIMES THESTEAIN. LBS. or ■WKOUGHT-lEON. Botto « « <cCoUB m aeoTnent to 12 5 0 0 a n no on nm ml Ik ki ier-tiG T 0 0 < a P _ n 0 ( 0 N < n M. t m L. i IK e k I Tiei k I rr n 0 p q ToAn K L M I K 0 p 0 B fcal for one half of the .. lonnt of wroneht-iroii Ph EhO Oh. A . ^^* ,* V m IB i 1 .a .3 / CO CS 4^ •4-4 <S © ^ =S xj OJ 03 ® »—I 1—1 .» R «i-i u X o r^ i o ■M ^© is II ^ a cl ^ 4 t & ttf Cl, Q IRON TRUSS BRIDGES FOR RAILROADS. 85 THE POST TRUSS. In this truss the posts are inclined, with the run of half a panel; the ties have a runof a panel and a half, and the counter-ties the same. Owing to the inclination of theposts, the ties run from the foot of one post to the top of the second post from it; whilethe counter-ties run from the foot of one post to the top of the adjacent one. The TopChord has a joint in the middle, but the Bottom Chord has not, having joints on eitherside of the middle, and half panels at each end. Assumed Weights and Measures. As this bridge is assumed to weigh the same as the others, we must obviouslyassume half bridge weights on the end jo
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Keywords: ., bookcentury1800, bookdecade1870, bookpublishernewyo, bookyear1870
