SILOS OF REINFORCED CONCRETE 



227 



Fro. 177. 



principal, by means of the 6" by f" wrought-iron right-angle plates 



shown. These four plates 

 should be securely bolted 

 together, the bolts passing 

 through the plates and the 

 timber between them. 



The remaining, ordinary 

 Vo» ^tv C 6 *^ 8 " rafters are 6" by lh" in cross 

 section, while the hip rafters 

 are 9" by 1£". 



In order to allow for 



ventilation, and the removal 



Fia. 178. ' 



of the gases of fermentation 

 which arise from the silage when first it is put into the silo, the roof 



