FORMS FOR CONCRETE SILOS. 



91 



at the same time and chute also being poured. The walls are 6 

 inches thick from top to bottom. The reinforcement used is 

 American Steel and Wire Company cold-drawn triangular mesh, 

 woven in various weights. This mesh provides sufficient vertical 

 reinforcement to prevent temperature cracks. 



Hy-Rib Concrete and Metal Lath Reinforced Silos. 



The Hy-Rib Concrete Silo, so-called because of Its steel-rib 

 basis, has recently rn.et with considerable success. It applies to 

 silo building the principles of monolithic reinforced construction 

 so successfully used in other buildings. In this type of silo no 

 forms or framework for the walls are required. Sheets of stiff, 

 firm steel sheathing are used, having a rough open surface, and 

 one inch projecting ribs every four inches of height. These 

 sheets are about two feet wide by 10 or 12 feet long. The first 

 round of sheathing is, of course, properly imbedded and anchored 

 in the foundation wall. 



Fig. 33. — Cross Section of Foundation of Hy-Rib Silo.^Courtesy 

 Trussed Concrete Steel Co., Youngstown. 



The following printed matter has come to our attention and 

 gives more complete information on reinforced cement and con- 

 crete silo construction. 



Bulletin No. 255, "Cement Silos in Michigan,". published by Ex- 

 periment Station, Bast, Lansing, Mich. "Silo Construction in 

 Nebraska," by Agricultural Experiment Station, Lincoln, Nebr. 

 Bulletin No. lOOi "Modern Silo Construction," and No. I'OT, "The 

 Iowa Silo," published by Experiment Station, Ames, Iowa. Farm- 

 ers' Bulletin No. 405, "Cement Silos," and No. 589, "Home Made 

 Silos," by the United, States Department of Agriculture, Washing- 

 ton, D. C, and booklets on "Concrete Silos," published by the 

 Universal Portland' Cement Co., Chicago, Ills., The Trussed Con- 

 crete Steel Co., Youngstown, Ohio, and Monolithic Silo and Con- 

 struction Co., Chicago, Ills. 



