304 



SOILING CROPS AND THE SILO. 



but they also cut into the staves, which is somewhat 

 objectionable. 



Flat hoops are usually made of band iron one* 

 eighth of an inch thick and varying in width from, 

 say, two and one-half to three and one-half inches 

 with the size of the silo. These two are held in place 

 by lugs which differ in some respects from those used 

 to hold the round hoops in place, but the principle 

 involved is the same. For a silo sixteen feet in 

 diameter, each complete hoop which encircles the 



Fig. 3a. Lugs for Hoops 



M, Cast-iron lugs for round hoops. 

 6, Wedge lug for flat hoops. 



same should consist of two separate pieces, and for 

 one with a much greater diameter, of three such 

 pieces. There is then less of a strain on the threads 

 while the burrs are being tightened. The lugs of 

 the various hoops should also be distributed rather 

 than rise one above another in a straight line. 



Woven wire hoops are sometimes used when 

 the silos are small. These vary in width with the 

 requirements of the silo. The power which some 

 kinds of woven wire have to contract and expand 



