Concrete Silos 



147 



These blocks are cast in steel molds, each mold 

 making ten blocks at one operation. A reference to 

 the illustration here shown will give a very good idea 

 of the assembling of the mold. Each mold consists of 

 two sides, two sets of division plates, clamps for lock- 

 ing molds, and core covers. The sides of the mold are 

 of pressed steel, fitted with hollow pressed steel cores, 



Method of Laying up Hurst Blocks 



which form the recesses at the ends of the blocks and 

 which also hold the reinforcing rods in place while the 

 blocks are poured. The division plates are of %-inch 

 rolled steel, 24 inches long and the height of the block. 

 These division plates are curved to conform to the 

 diameter of the silo and can be furnished for any 

 size. Short division plates are also supplied for mak- 

 ing sectional blocks for "fillers." Two sets of stand 

 ard division plates are furnished with each mold, s 

 that it can be filled twice daily, making twenty block? 



