10 April, 1918. J 



Si/o ior Eiisilaf/e or Grain. 



229 



Walls. 

 Proceed to make doorways, as shown (Fig. 1), out of 4 x H hard- 

 wood. "When the frame has heen made and squared, the first two staves 

 should he holted at the hack of frame, the edge of staves heing kept back 

 1^ inch from inside edge of door frame to form a rebate for doors to fit. 

 Place the door frame in position on foundation. Plumb up and fasten 

 to scaffold. Now proceed to place staves in position — first a 20-ft., then 

 a 10-ft., and so on, and in this way break the joints. Where the staves 

 butt together the ends should be scarfed for a depth of 2 inches. Use 

 Oregon lathes to hold staves temporarily until a section is erected, when 

 the angle iron may be used to keep the silo in shape until the whole of 

 the staves are erected on first section. Put on a couple of 5-8 bands, but 



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Fig. 1. 



do not screw up too tightly until the top section of staves is in place. 

 The joint of the band should be distributed over the silo, for if they be 

 put in a direct line the strain will all come on one place, and soon pull 

 the silo out of shape. Do not tighten all at one joint, but screw up a 

 little at each until the whole silo is tight. Fix one set of angle iron with 

 screws on outside of silo and midway between top and bottom, and the 

 other on top inside edge of silo. Attach three guy wires to top hoop and 

 to anchor posts previously set in concrete, and strain tight with 

 couplings. 



Roof. 



An octagon roof is now made with a gable to allow of admittance of 

 the elevator. The rafters are of 4 x H hardwood, fastened on top end to 



