. Details of riveted railroad truss bridges . and is a very good detail. This detail may or may not have a i 43- gusset plate as a brace. For very heavy bridges the portals areusually made of plates and, as mentioned in the first part of thisdiscussion, are usually as deep as the end post in order to hefastened to both of its sides. A standard portal used on the Northern Pacific Railroadis shown in This detail is a neat and effective detailbut certainly requires work and skill in the shop. Outside of. |i the end plates in which the end circle is cut^ the work is easythe and design econo
. Details of riveted railroad truss bridges . and is a very good detail. This detail may or may not have a i 43- gusset plate as a brace. For very heavy bridges the portals areusually made of plates and, as mentioned in the first part of thisdiscussion, are usually as deep as the end post in order to hefastened to both of its sides. A standard portal used on the Northern Pacific Railroadis shown in This detail is a neat and effective detailbut certainly requires work and skill in the shop. Outside of. |i the end plates in which the end circle is cut^ the work is easythe and design economical. There is no advantage gained in theshape of this end plate. A portal used by the Baltimore and Ohio Railroad isshown in This detail with the exception of the braceis very good. The increased depth at centre makes it possiblefor the portal to take more bending stress. A straight kneebrace is more effective than the brace shown^and is much easierput in place. H Some of the largest bridges have comparatively simpleportals, some of the general shapes of which are shown belo?/: - -44- Railroad bridge at Rock Island. Delaware Riverbridge at Philadelphia Union Railroad Bridge. RankinPensylvania.
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Keywords: ., bookcentury1900, bookdecade1900, bookiddetails, booksubjecttheses
