CHAPTER XII 



OTHER MONOLITHIC SYSTEMS 



Peerless Silo Molds. These molds are controlled by 

 the New Enterprise Concrete Machinery Company, 

 First National Bank Building, Chicago. They are made 

 of sheet steel, reinforced with iron frame, and are suffi- 

 ciently flexible so that various diameters of silos can be 

 made with the same forms by using smaller plates to 

 bring them to the proper circumference. The inside 

 form is a No. 16 

 steel and the outside 

 form is a No. 18. The 

 chute is poured at the 

 same time as the main 

 body of the silo wall. 



The unusual fea- 

 ture of this system is 

 the combined derrick 

 and scaffold which 

 rests upon the con- 

 crete wall, doing 

 away with the necessity of building up staging from 

 the ground. The derrick and staging are raised 

 by four small jacks or raising devices, stationed 

 at the quarter points of the circumference, with a man 

 at each jack. By this means the derrick-scaffold is 

 raised first, before the forms are drawn up into place. 



These molds have a daily capacity of 5, 6, or 7% 

 feet, depending on the number and type used. The 6- 

 foot molds are made in two rings of 3 feet each. The 



Peerless Outfit. 



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