62 
CONCRETE SILOS 
irregularities cause uneven settling of the silage, thus forming air pockets. 
The presence of an air pocket frequently causes silage to spoil on all sides 
within a foot of the pocket. 
The inner surfaces of the forms should be painted before using, with 
linseed oil, soft soap or equal parts boiled linseed oil and kerosene, which 
Paintin the ^^^^ prevent the concrete from sticking. This treatment is 
Forms especially important where forms have wooden surfaces, but 
is also beneficial when applied to galvanized iron surfaces. 
Materials for Home Made Silo Forms for Silos with Inside 
Diameters 10 feet to 22 feet 
16 — 2 in. X 12 in. plank 
4 ft. long for silo 10 feet diameter 
43^ ft. " " " 12 
ft. " " " 14 
6K ft. " " " 16 
ft. " " " 18 
ft. " " " 20 
ft. " " 22 
1 in. X 4 in. boards, for quantity see table. 
16 — 2 in. X 6 in. cleats — 3 ft. long, cut on radius "r. " 
2 in. X 4 in. studding planed. (Required quantity equal to 16 times the height of 
the silo.) 
No. 22 Gauge galvanized sheet iron 3 feet wide. (For quantity see table.) 
No. 18 Gauge galvanized sheet iron 3 feet wide. (For quantity see table.) 
64 — 3^-inch bolts 43^ inches long (for cleats). 
8 — 3^-inch bolts 12 inches long (under forms). 
6 — 3^-inch bolts 12 inches long (for outer forms). 
4 Iron Straps }^ in. x 2 in. x 3 ft. 0 in. 
12 Iron Straps 3^ in. x 2 in. x 2 ft. 6 in. 
Inside 
Diameter 
of 
Silo 
Feet 
A 
Inches 
Dimen 
inner fo 
B 
Vt.. Tn. 
ions of 
rm rills 
C 
Ft. In. 
Ft. 
R 
In. 
No. of 
I in. X 6 in. 
Boards 3 ft. 
long in 
inner form 
No. 18 gauge 
galvanized 
sheet iron 3 ft. 
wide 
Ft. In. 
No. 28 gauge 
galvanized 
sheet iron 3 ft. 
wide 
Ft. In. 
10 
8 
3 
3 
3 
103^ 
4 
11 
96 
36 
7 
31 6 
12 
6% 
4 
IK 
4 
5 
11 
112 
42 
10 
37 8 
14 
6 
4 
5 
5^ 
6 
11 
134 
49 
3 
44 0 
16 
5 
5 
9 
6 
23^ 
7 
11 
152 
55 
6 
50 0 
18 
43^ 
6 
63^ 
7 
03€ 
8 
11 
168 
61 
9 
56 6 
20 
3 
7 
7 
9% 
9 
11 
192 
68 
0 
62 10 
22 
8 
3 
8 
73i 
10 
11 
208 
74 
5 
69 2 
01 
I 
Inner form ribs. 
