lo July, 1911-] 



Silo ConstructioH. 



493 



Treble Hoops. — Xail three of the 6-in. x |-in. boards to the inside 

 of the posts, carefully springing the first of them to the circle of the tram- 

 mel, off which half-an-inch, the thickness of the board, must first be cut. 

 Make butt joints and let each successive hoop break joints. Keep the 

 bottom edge of the first treble hoop 30^ in. from the top of the post, which 

 will leave it 8| in. above the surface of the ground. A similar treble hoop 

 is fixed so that its upper edge is i^ in. below the toj) of the post. In 

 fixing the upper treble hoop, the trammel, to which a lengthening piece 

 has been nailed, should be used on the slant to insure a correct circle. 

 These two treble hoops are used to fix studs in upright position. 



Studs and Single Hoops. — First bore and check studs as shown 

 in drawing. The 2^2 studs (6/24-ft. and 26, 21-ft. — 4-in. x 2-in. hard- 

 wood) are to be bored for bolts (^-in. bolts) and countersunk \ in. deep, 

 I in. diameter clear, for heads of bolts. The centre of first hole is to be 

 9 in. from the bottom of stud, the second 32 in., the third 53 in., and 

 thence at intervals of 35 in., 

 the ninth and last being 19 ft. 

 All studs are to be checke(J 

 out 6 in. wide and \ in. deep 

 on the same side as the coun- 

 tersinking ; from bottom of 

 stud to bottom of first check 

 32 1 in. ; and from bottom of 

 first to bottom of second 35 in., 

 and so on to the sixth check 

 17 ft. T^\ in. from the bottom. 

 The seventh and last check is 

 20 ft. exactly from the botton. 

 of the stud. 



Before setting up studs de 

 cide upon position of port 

 holes; these to the number of 

 three, if the first is in the 

 second row of iron, or four ii 

 the first is at ground level, 

 should be vertically above one 

 another, and should be so 

 located as to make the trans- 

 port of silage to the feeding 

 place as easy as possible. The first stud to be erected should form one 

 side of the row of port holes. The port holes need not be in line with 

 ridge. They may be at any part of the silo. The .studs are fixed to the 

 hoops on the flat, every fourth one coming opposite a foundation post, to 

 which they are bolted with two 8-in. x \'\n. Iwlts passing right through 

 the studs, treble hoops and posts. The intermediate studs are bolted to 

 the treble hoo|)s with 3i-in. x ^-in. lx)lts. The bolts are all inserted 

 from the inside, keeping the nuts on the outside for access wheti screwing 

 uj) later on The s[)aces between the studs, except at the port holes, 

 should be 13^ in. clear measured between the inside edges of the studs. 

 but are generally a little more depending upon the actual dimensions of 

 the studs. To allow for this, cut a template 13^ in. long, using it 

 as a gauge to correctly space the studs. Drive a 4-in. nail 3 in. above 

 the centre of the third hole from the bottom of thf stuil. When erecting 

 stud, let it rest on this nail on top edge of ui)pt^r tr(4)le hoop ; then nail 



IO2-TON WOOD AND IRON SILO. 



