102 



SILOS OTHER THAN WOOD. 



reinforcement across door opening. L, M, N and O, P. Q show 

 two types of door jambs and regular blocks put out by another 

 manufacturer. N indicates the vertical reinforcement next to 

 the door around which the wall reinforcing steel is placed. The 

 galvanized iron tie E for the door opening is shown in position 

 on top of the block O. 



^-orS'Concretertoor^ 



Qndec^ filling gnd tile droin,if neceasory 



Fig. 44. — Showing two methods of preparing the founda- 

 tion for clay block silos. (Courtesy Iowa Experiment 

 Station.) 



The Iowa silo is a hollow clay tile silo that was designed by the 

 Agricultural Engineering section of the Iowa Station. It Is 

 very popular as it does not require special blocks. The Iowa 



Silo is simple in construc- 

 tion, durable, efficient and 

 reasonably cheap where the 

 tile can be obtained. It is 

 built of regular clay hollow 

 building blocks similar to 

 those shown in the illustra- 

 tion of Figure 47. The tile 

 are laid in cement mortar 

 which contains just enough 

 lime to make the mortar stick 

 well (one part cement, ona- 

 third part lime, two to three 

 parts sand). Number three 



^3:iy>i%&-/>'-; 



-Kvs'— H 



Fig. 46. — Clay block silo 

 foundation. — (Nebraska . 

 Bulletin No. 138.) 



