82 



Concrete Silos 



Section of Mold 



Chute. 



frame are entirely separate from the wall forms, the 

 latter depending entirely for support on the 3 feet of 

 wall when closed by the lower circle of forms ; and as 

 the upper section of the staging frame is always above 

 the wall forms the same outfit will, of course, answer 

 for varying diameters of silos. 



These silos are reinforced with triangle mesh rein- 

 forcing, the selection of the reinforcing depending 

 upon the size of the 

 silo and being selected 

 usually to provide suf- 

 ficient strength with- 

 out placing any addi- 

 tional wires. The 

 company recommends 

 a 38-inch width, this 

 allowing a 2-inch lap 

 between courses. After a circle has been poured and 

 it is desired to move up the lower section of the forms, 

 the bucket at the end of the derrick is taken off and 

 a wooden seat is suspended from the hook in its place. 

 By this means a man is lowered to the outside of the 

 forms and removes the clamps which hold the two 

 sections together. The forms are drawn up by men 



on the scaffold 

 by means of 

 hooks which 

 engage in holes 

 in the angle 

 iron welded to 

 the top of the 

 forms. The in- 



Monsco Roof Form. 



side forms are 

 m a n i pulated 



