UNIVERSAL PORTLAND 
CEMENT CO. 
83 
As soon as the wall 
has been brought up 
, _,, to the level 
le Floor p . i 4. i 
01 the tank 
floor, the outer form 
should be raised 1 foot 
and the inner form 
lowered 1 foot. A 
heavily -braced plat- 
form which will sup- 
port the concrete floor 
should then be erected 
upon the inner form. 
The floor form must 
be made of 2- inch 
planks supported on 
2 X 10-inch joists, 
braced to the staging 
as well as to the inner 
form, which must be 
strengthened if much 
of the weight of the 
floor is to rest upon it. 
The floor form must be 
able to support a load 
exceeding 125 pounds 
to the square foot in 
the case of a 16-foot 
silo, or 75 pounds to the 
square foot for an 8- 
footsilo. The greatest 
caution must be exer- 
cised in getting the 
framing put up in such 
manner that it will 
carry the load without 
danger of collapse. 
The entire floor 
must be concreted at 
one operation. The 
necessary materials 
must be on hand, and 
provision made for 
mixing in large batches 
and elevating as speed- 
ily as possible. These 
are points which are 
absolutely essential 
for perfect work. The 
concrete should be 
made in the propor- 
Sectional View of a Reinforced Monolithic Silo, showing water supply tank, 
roof, chute, concrete drain tile, and other essential details 
