86 
CONCRETE SILOS 
Pi in and '^^^ overflow outlet may consist of a 3-inch pipe passing through 
Overflow wall about 6 inches below the cornice. This pipe may be run 
down within the chute or on the outside of the silo, and led to a 
line of tile. In many cases, however, the pipe is simply made to stick 
straight out of the wall about a foot, and the overflow is not drained ofl^ in 
any way. This method is not recommended as a general thing, but may be 
suitable if close watch is kept so that the tank is rarely filled to the over- 
flow point. 
A concrete roof should cover the water tank, which will prevent the 
water from freezing, to a great extent. A roof also keeps the water 
cooler in summer and cleaner at all seasons of the year. No farmer 
should overlook the fire protection feature of a water tank on top of the 
concrete silo. 
Chart Showing Horizontal Tank Reinforcing 
DJAMETER 
TANK 
SIZE 
ROUND RODS 
I 
I 
to FT 
12 rr 
4- 
/■4 rr 
3" 
8 
4 
le FT 
I" 
8 
I 
5 
3. 
