150 STEEL RAILWAY BRIDGES. CHAP. IV. 



'Cross Girder' Tower Span Intermediate -Span Tower Span Cross Girder? 



Trestle dent 



(a) 



Tower 



(b) 

 FIG. 2. RAILWAY STEEL TRESTLE. 



TABLE I. 



DATA ON RAILROAD BRIDGES DESIGNED UNDER COMMON STANDARD (HARRIMAN LINES) 



SPECIFICATIONS C. S. 1006. 



