DESIGN OF STRUCTURES 259 
To be of 160 feet span divided into eight equal panels, Ratio of depth to span, }. 
To carry a train consisting of locomotives of the type shown in Fig. 389. 
6. Design for a single track railway bridge of the type shown in the worked 
_ example (pp. 248-258). To be of 160 feet span. Ratio of depth to span about jy. 
_ To carry a train of locomotives of the type shown in Fig. 390. 
Fia. 390. 
7. Design fora double track railway bridge of the Whipple-Murphy type. 
_ Span, 200 feet. It is required to carry trains of locomotives of the type shown 
in Fig. 390. 
