ERECTION OF STAVE SILOS 53 



are lapped more than 2 feet, or full-length staves are used, it 

 will be necessary to build the scaffold full height before erect- 

 ing any of the staves. The first thing to do is to erect the 

 door frame. 



The uprights are then spliced to the lower ones and the 

 scaffold built another section higher in much the same manner 

 as at first. In securing the staves in place, it is necessary to 

 have common plastering lath, 3-inch bats, or salt or lime 

 barrel staves which have been soaked over night in order to 

 get them to bend easily. As the staves are put in place nail 

 these strips of lumber to them to hold them together. 



Handling the Staves. In any method of erecting it will 

 be found most convenient to clamp three staves together 

 before raising. A convenient method of doing this is to set 

 saw horses upon reasonably level ground and match the silo 

 staves together upon them. Then nail the convex or outside 

 surface of the barrel staves fast to the inner surface of the 

 silo staves, after the staves have been drawn reasonably 

 close together. The barrel staves ought to be long enough 

 to project 6 or 8 inches beyond the edges of the two outer 

 staves so that as each section of these staves is upended, 

 the projecting ends of the barrel staves may be nailed to the 

 portion of the silo which is already erected. In this way 

 crooked or warped staves do not give as much trouble as when 

 set up singly; also clamping the staves together holds them 

 better. 



The difficulty of lifting a heavy section is overcome by 

 the use of a rope and pulley. The pulley may be attached to 

 one branch of a "U" doubletree clevis, which is then hooked 

 over the top of the last stave set up; by passing the rope 

 through this pulley and taking a timber hitch around the 

 three staves they can be easily raised by a man on the ground. 

 The rope should of course be hitched a few feet from the end, 



