The Design of Simple Steel Bridges

The Design of Simple Steel Bridges

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1912 edition. Excerpt: ...impossible to arrange the joint without having rivets in tension, They must, of course, be properly set up, the ends of the bolts being turned up over the nuts so that they can never move. Figs. 219 and 220 show a cross girder hung underneath the lower flange of a large braced girder by four suspension angles. These transmit the weight from the cross girder end to the main girder by thirteen rivets in double shear forming a very strong joint. It should be noted that the flange plates in this example are vertical instead of horizontal, so that no other means of supporting the cross girders except by suspension plates or angles can be used. Fig. 221 shows a cross girder with its end slotted so as to allow it to fit over the projecting flange of a channel, such as might form part of the lower flange of a braced girder. RAIL BEARERS. These consist generally of I section rolled steel joists. They need rarely be of any stronger section than is to be had of standard size from any makers. They are, however, sometimes built up of angles and plates. When this is the case they rarely have a top flange plate, the angles at the top and bottom take the flange stresses, rest on top of the cross girders, but are usually fixed between the cross girders so that their top flanges are flush with the top of the cross girders. They are rarely as deep as the cross girders in section, and hence rest either on the lower flange of the cross girders, with a packing piece of suitable thickness to raise them up flush on top, or else on an angle bracket fastened to the web of the cross girder. Fig. 222 shows various methods of attachment. In order to allow the top flange of the rail bearer to be brought up flush, a rectangular notch or joggle is made in the rail...
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Product details

  • Paperback | 114 pages
  • 189 x 246 x 6mm | 218g
  • United States
  • English
  • black & white illustrations
  • 123679317X
  • 9781236793171