88 



HOW TO BUILD A SILO. 



until a space of 3 feet 6 inches is reached; from this point 

 up this distance shall be preserved as near as possible to 

 the top. \ 



Roof. Roof shall be made to a half-pitch of 6-inch 

 clear siding lapping joints, nailed to 2x4-inch rafters, 2-feet 

 centers 1-foot by 4-inch ridge, and 2x4-inch plates. These 

 plates to be supported on two 4x4-inch pieces resting on 

 top of hoops. Three Ix4-inch collar beams shall be spiked 



Fig'. 14. A cheap roof of a stave silo. (Clinton.} 



to end and middle rafters to tie side of roof together. See 

 Fig. 11.) Fig. 14 shows another simple construction of 

 roof on a stave silo. 



PAINTING. 



The entire outside of the silo, including roof, shall be 

 painted two coats of good mineral paint; the entire inside 

 surface of the staves and doors shall be thoroughly coated 

 with hot coal tar. 



