48o 



Bulletin 167. 



plumb and should be toe-nailed at the top to one of the posts 

 oris:inallv set. 



If one man works at the top of the staves and one at the bot- 

 tom with another man to assist in raising them in position they 

 may be set up very rapidly. Immediately a stave is set in place 

 it should be toe-nailed at the top to the preceding stave set. It 

 has been found that the work of setting up and preserving the 

 circular outline may be materially aided by the use of old barrel 

 staves. For a silo 12 feet in diameter the curve in the stave of 



the suo^ar barrel 



IS 



best adapted, for a 16 

 foot silo the flour bar- 

 rel stave is best and 

 for a silo 20 feet or 

 more in diameter the 

 stave of the cement 

 barrel is best. Before 

 commencing to set up 

 the silo there should 

 be at hand an abun- 

 dance of old barrel 

 staves of the kind best 

 adapted to the work 

 as designated above. 

 When a silo stave is 

 set in place nail to it 

 horizontalh' and on 

 the inside a barrel 

 stave. One barrel 

 stave will reach across several of the silo staves and should be 

 securedby shingle nails to each silo stave. One row of barrel staves 

 should be nailed on or near the top and one near or below the mid- 

 dle. These barrel staves assist in keeping the silo on the proper 

 curve and do away with the necessit^^of making a mold or form. 

 Fig. 78 shows how the barrel staves are used. If when the sila 

 staves are put in place they are toe-nailed securely to the ones 

 previously set ; if they are fastened firmly to the permanent 

 upright posts (a, a, a, a fig. 77) ; if the barrel staves are used 

 as directed above, the silo will have sufficient rigidity to stand 



Fig. 78. — Shows how barrel staves may be used 

 in setting up a silo, they should be removed 

 before the silo is filled. 



