126 



Concrete Silos 



These silos are 

 held together by out- 

 side hoops, as is the 

 case with wood 

 staves, the hoops be- 

 ing placed closer to- 

 gether at the bottom 

 to provide for the 

 greater strain, the 

 spacing being gradu- 

 ally increased as the 

 top is approached. 



Some of the com- 

 mercial stave silo 

 systems now on the 

 market are described 

 in the following 

 pages. 



Many of these 

 silos have been built 

 on the foundations 

 of old wood stave 

 silos and are giving 

 excellent satisfac- 

 tion, a point which 

 is worth while re- 

 membering in pro- 

 moting the sale of 

 these silos. The 

 foundation for the 

 stave silo is made 

 the same as for other 

 types. 



Perfection Stave Silo on State Fair 

 Grounds at Des Moines, la. Diameter 

 14 feet 4 inches ; height 44 feet 4 

 inches ; capacity 194 tons. 



