108 



Concrete Silos 



2x4 should be spaced out the proper distance from the 

 2 x 4 of the door form, also out 2 inches from the inside 

 edge of the 

 plate; a 16- 

 penny nail 

 should be 

 driven into it 

 through the 

 plate. Raise 

 the next 2x4 

 in like man- 

 ner, building 

 the plate on 

 ahead two or 

 three sections 

 at a time. As 

 soon as three 

 or four 2x4 's 

 are in place, 

 a p ie c e of 

 light mate- 

 rial, such as 

 ordinary 

 weather- 

 boarding, 

 should be 

 bent to the 

 form of a 

 hoop and 



nailed to each 2x4, 4 or 5 feet above the foundation, 

 with a 4-penny nail, spacing the studding with the same 

 length of gauge as has been used at the top. 



These strips of weather boarding should be ex- 

 tended as the 2x4 's are set until circle is completed. 



Raising- the Door Form. 



