. The science of railways . Fig. 158. LONG SPAN BALTIMORE TRUSS — MODIFICATION OF WARREN TRUSS. This is a method in a long span of supporting the floor at Ihree inter-mediate points in a panel as is done by the double lattice girder Fig. 155,ABCDEFGHIis thesimple Warren members J K L M, etc.,and vertical members C M, N L, O D, F J, E K, etc., are added to supportthe floor system at N O P, etc, and to stiffen the upper chord at M K, Fig. 159. LONG SPAN BALTIMORE TRUSS—ALSO KNOWN AS THE ARCHEDTRUSS, THE BOWSTRING TRUSS AND THE CAMELBACK TRUSS. As shown by panel D D and E E th
. The science of railways . Fig. 158. LONG SPAN BALTIMORE TRUSS — MODIFICATION OF WARREN TRUSS. This is a method in a long span of supporting the floor at Ihree inter-mediate points in a panel as is done by the double lattice girder Fig. 155,ABCDEFGHIis thesimple Warren members J K L M, etc.,and vertical members C M, N L, O D, F J, E K, etc., are added to supportthe floor system at N O P, etc, and to stiffen the upper chord at M K, Fig. 159. LONG SPAN BALTIMORE TRUSS—ALSO KNOWN AS THE ARCHEDTRUSS, THE BOWSTRING TRUSS AND THE CAMELBACK TRUSS. As shown by panel D D and E E this is modified form of a Pratt Truss;AB, B C, C D, D E. E F. etc , D E, E F. etc., are the oblique members ofthe Pratt truss:B B, C C, D D, E E, F F, are the vertical members of thePratt truss. To support the floor .system at G 11 I, etc., the oblique membersL B. M C, N C, and the vertical members L G, M H, N I, O J, P K, areadded. The pressure exerted by the top chord is carried to the abutmentat A by the members already alluded to, and the segment of a circle orarch made by the members A B, H C, and V/ D, of the top chord whichact as an arch. This form of truss is suitable for long spans and is econom-ical in the use of metal. 252 BUILDING AND HE PAIRING RAILWAYS. sources of the company permit by earth em-bankments, or in the case of heavy fills, by steelviaducts and arched culverts with earth embank-ments. Fig. 166 illustrates a pile tres
Size: 2581px × 968px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1900
