CONSOLIDATED STEEL CORPORATION 



BETHLEHEM STRUCTURAL SHAPES 



Bethlehem Structural Shapes have proven to be a radical improvement and 

 advance in the field of structural steel, reducing the cost and extending the 

 use of steel in construction. They have achieved a remarkable success and 

 are highly regarded and strongly endorsed by leading engineers and architects. 



Bethlehem Structural Shapes are wide flange I-Beam Sections rolled by 

 the Grey Universal Beam Mill. Similar beams, 10 to 30 inches deep, with 

 flanges 10 to 12 inches wide, have been rolled by the Grey Mill in Germany 

 since 1902 and are used extensively in Europe, England, Canada, and else- 

 where. The larger and improved Grey Mills at Bethlehem, placed in success- 

 ful operation early in 1908, rendered such sections available for the first time 

 in this country. 



In regard to shape and strength, Bethlehem Sections afford many advan- 

 tages. They can be used for every purpose instead of ordinary beams, or 

 even instead of riveted sections, with economy in weight or saving in cost of 

 fabrication, and in most cases with a saving both in weight and in cost of 

 fabrication. 



The Grey Mill has vertical as well as horizontal rolls, forming the web 

 and flanges of a beam by coincident rolling operations. Wider flanges are 

 thus obtained than can be made by former methods of rolling. The method 

 of rolling is shown by Fig. 1. The horizontal rolls, //, and the vertical rolls, V, 

 are brought proportionately closer together at each successive passage of the 

 beam through the rolls. Fig. 2 represents a supplementary mill through 

 which the beam passes, the purpose of which is to edge the flanges only, no 

 other work being done in this secondary mill. 



Fig. l 



For large beams the ingot is cast approximately of an I-beam shape, as 

 shown by Fig. 3, in which the outer line represents the cross-section of the 

 ingot in relation to the finished beam, both being drawn to scale. By succes- 

 sive reductions the ingot is rolled into a beam of proportionate dimensions. 



Shapes produced by the Grey Mill have thus a uniform work of reduction 

 in the rolling on all parts of the section and a uniform quality of metal through- 

 out the section with a consequent absence of internal stress. 



