42 



HOW TO BUILD A SILO. 



A still more substantial lining of the same type may be se- 

 cured by using two layers of paper between three layers of boards, 

 as represented in Fig. 3, and if the climate is not extremely severe, 

 or if the silo is only to be fed from in the summer, it would 

 be better to do away with the layer of sheeting and paper outside, 

 putting on the inside, thus securing two layers of paper and three 

 layers of boards for the lining with the equivalent of only 2 inches 

 of lumber. 



The Silo Roof — Roofs on silos make big savings in keeping 

 the silage from drying out and blowing around. They keep 

 the wind out and make the silo warm in winter, free from snow 

 and freezing, and the silage in good shape for feeding. The roof 

 adds to the life, appearance and stability of the silo and it will 

 prevent making the silo a neighborhood feeding ground for pigeons. 



The roof of cylindrical silos may be made In several ways, but 

 the simplest type of construction and the one requiring the least 

 amount of material is that represented in Fig. 8, which is the cone. 



If the silo is not larger than 15 feet inside diameter no rafters 

 need be used, and only a single circle like that in the center of 

 Fig. 8. this is made of 2-inch stuff cut in sections in the form 

 of a circle and two layers spiked together, breaking joints. 



The roof boards are put on by nailing them to the inner circle 

 and to the plate, as shown in the drawing, the boards having been 

 sawed diagonally, making the wide and narrow ends the same 

 relative widths as the circumference of the outer edge of the 

 roof and of the inner circle. Thus a 10-foot board 8 inches wide 

 would be sawed so as to make two 10-foot lengths, each being 6% 

 inches wide at one end and 1% inches wide at the other. 



^ROOF smc y/ftv. 



jr^ii/i/3 ttr TWi. 



Fig. 9. — Showing construction and details of one style of roof. 

 (From Nebr. Bui. No. 138.) 



