54 PRACTICAL SILO CONSTRUCTION 



erting a side pressure of about 11 pounds to each 

 square foot, for every foot of depth. 



In the next line N. refers to the number of rods 

 or strands of wire used for each hoop or horizontal 

 reinforcement. S. refers to the distance in inches 

 these hoops or horizontal reinforcements are spaced 

 apart. The first column states the inside diameter 

 of the silo, while the last column states the size of 

 the wire or rods used. 



Thus, for a silo 10 'to 14 ' in diameter we would 

 use 1, | " rod, spaced 18 " apart for the first 5 ' from 

 the top, also for the next 5 ' to 10 ' ,' 15 " apart for 10 ' 

 to 15', 14 " apart for 15' to 20', 11 " apart for 20' to 

 25 ', 9 " apart for 25 ' to 30 ', 8 " apart for 30 ' to 35 ', 

 and 7 " apart for 35 ' to 40 ', thus bringing the great- 

 est strength of the reinforcement at the bottom of 

 the silo, where the greatest pressure is exerted by 

 the column of silage. 



The hoops or horizontal reinforcement should be 

 tied to the vertical rods with wire. These may be 

 added as the forms are filled and raised, so they will 

 not interfere with the clamps used on the forms. 



The system of reinforcing given is ample for a 

 wall of 6" in thickness or greater when made mono- 

 lithic, or it may be applied to plastered silos where 

 the wire lath or expanded metal lath is securely tied 

 to the reinforcing wires and rods. 



