158 



STEEL RAILWAY BRIDGES. 



CHAP. IV. 



WEIGHT OfS/N6LE 7WCK J?. WADUGT, TOWE2S. 



Coopers EBOLoadipj A.&E.ZM. W. Spec's -1900. 



30'S 30' Spans 



Weight of 30 ft.Span complete =14400 



c 



D 



< 



"o 



to 



130 

 120 

 110 

 100 

 00 

 80 

 70 

 60 

 50 

 40 

 30 

 20 

 10 



25' 35 45' 55' 65' 



Height . of . Towers (from cap to base.) 

 40'X40' and 30'560' Spans' 



Weight of 60ft.5pan complete =40200 

 -30fb. " =15300 

 =22100 



90' 



50' 60' 70' 80' 90' I00 r 



Height of Towers (from cap to base) 

 FIG. 17. WEIGHT OF STEEL VIADUCTS. MCCLINTIC-MARSHALL CONSTRUCTION Co. 



