568 



STRUCTURAL MECHANICS. 



CHAP. XVI. 



Bridge Analysis. PetitTruss. Problem 9. 



.Stresses by Algebraic Moments. 





Dead and Live Load Stresses 



Dead Load * 0,6 tons per foot per truss. 



Live >'--/. 4 " " ., 



Span =550~0. Panel-?5-0'. A 

 Depth-50'-0"anol 5Q L 0" 



Lever Arms 



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