STEEL CYLINDER PIERS FOR RAILWAY BRIDGES. 



(2) "Cylinder piers can be constructed under traffic with less trouble than any other type. 



(3) "Cylinder piers permit of rapid sinking by open dredging where the material is. favorable 

 and Minken logs are not liable to be encountered. Air pressure can be applied readily and cheaply 

 if it IK-COIIU-S necessary." 



Details of the cylinder piers for the Oxford Mill Pond bridge arc shown in Fig. 17, and details 

 of the steel shells for the base of the piers are shown in Fig. 18. The bridge is 481 feet long and 

 consists of 30 ft. and 60 ft. spans resting on piers made of two steel cylinders and a steel shell for 

 the base, filled with concrete. 



L SHffener 

 -L 



- -Plate 



MINIMUM SIZES OF STEEL OBLONG PIERS 

 COOPER'S STANDARDS 



OdL ONG 5TEEL PlERS 



FIG. 15. STEEL OBLONG PIERS FOR ELECTRIC RAILWAY AND HIGHWAY BRIDGES. 



COOPER'S STANDARDS. 



TABLE V. 



DATA ON SEVERAL STEEL CYLINDER PIERS USED BY THE CHICAGO AND NORTHWESTERN 



RAILWAY. 



* Rests on Sandstone. 



t Hard Clay. 



t Rests on Hard Shale. 



