74 SILOS, ENSILAGE AND SILAGE. 



springing of the side walls. For this purpose a truss of 

 the form sketched in Fig. 7 (T, T, T, T, V, V, V, V, 

 V) will be less in the way than a tie beam, and quite as 

 efficient. It may be made of two 2x8 or 2x10 scantling, 

 T, T, T, T, nailed together at the top, to which are 

 nailed inch boards, V, V, V, ten or twelve inches wide, 

 as ties of the truss. The ends of the truss are toe-nailed 

 to the plates P, P, and spiked to the studs 0, 0. A 



Fig. 7. Form of truss to prevent spreading of the walls, with relations to roof. 

 T, T, T, T, 2x10 scantling; V, V, V, V, V, 1x12 boards, forming the truss; N, N, 

 studs of silo proper; P, P, main plates; O, O, studs for roof; S, S, upper plates; R, 

 R, rafters. 



board on each side may be nailed to this truss and to the 

 top of the middle studs 0, 0, as a tie to the upper, or 

 roof plates S, S. 



The bottom of the silo, seen in outline section in Fig. 

 5, may be finished by firmly packing the earth, E, E, 

 and covering with a few inches of concrete, C, C. 



The concrete is not absolutely necessary and is often 

 omitted when the bottom is clay that can be puddled and 

 packed. A pitched plank floor would have advantages 

 as a non-conductor of heat, and it can readily be laid 



