130 CONSOLIDATED STEEL CORPORATION 



BETHLEHEM I-BEAMS AND GIRDER BEAMS 

 FOR RAILROAD BRIDGES 



The table on the opposite page shows the application of Bethlehem Rolled 

 Beam and Girder Sections for use as track stringers in railroad bridges and for 

 short span railroad bridges. The table is calculated according to Theodore 

 Cooper's Specifications for Railroad Bridges for a loading of E-40, equivalent 

 to a capacity for 142-ton locomotives. All figures are given for one rail or one- 

 half track. 



The size and weight of the Bethlehem Rolled Sections which are required 

 for the purpose are given for the various spans. As a comparison, the size and 

 weight of the corresponding present Standard I-Beams that could be employed 

 for the same purpose are also given, so far as Standard Beams could be used. 

 The economical weight of the Bethlehem Beams is apparent from this com- 

 parison. Riveted girders would be required on spans greater than 17 feet in 

 length, unless the more economical rolled Bethlehem Beams are used. 



Bethlehem Rolled Beams, for all spans under 25 feet in length, will weigh 

 less than the most economical riveted girder it is possible to design, even when 

 the depth of the latter is unlimited. For spans over 25 feet in length the rolled 

 beams will weigh less than riveted girders of equal depth. 



In every case the Bethlehem Rolled Section is economical, weight or cost 

 considered, as compared with a Standard I-Beam or with a riveted girder. 



The Bethlehem Beams also can be used to advantage for the cross girders 

 or floor beams of bridges. Where available depth is limited, the rolled girder 

 sections having twice the section modulus of standard beams of equal depth 

 will be found desirable for stringers or cross girders and prove economical in 

 weight and cost as compared with built-up riveted girders which otherwise 

 would be required. These rolled girder sections will also be found specially 

 adapted for solid bridge floors of shallow depth. 



