23
4. Fill excavated area with 3/4" crushed gravel.
5. Compact gravel.
6. Reinforce and pour curb-type or single-pour foundation according to
and
.
Note
Use high-strength sulphate-resistant concrete (3000 psi, 21 MPa minimum).
7. Place hopper on foundation using 1/2" anchor bolts.
Note
Use shims to ensure all legs contact the pad. Allow the concrete to cure for a minimum of 21 days
(recommended) before filling the bin. This period of time ensures the concrete reaches at least 75%
strength.
Note
A steel foundation is not recommended when using a concrete foundation.
Figure 6.
Concrete Foundation
Table 3.
Steel and Concrete Foundation Specifications
Bin
Diameter
Capacity
(Tons)
Number of
Legs
Founda-
tion
Diameter
“D”
Leg Center
Diameter
“L”
Chord “C” Depth “T”
Concrete
or Gravel
Width “W”
Tie Qty
“U”
8'
18
4
107"
89"
67–1/2"
8" to 10"
18"
n/a
12'
27 to 57
6
167"
147"
74"
10" to 12"
20"
12
12'
73t
6
171"
147"
74""
14" to 16"
24"
12
14'
34 to 54
6
182"
161–3/4"
80–3/4"
10" to 12"
20"
12
14'
73 to 92
6
186"
162–3/4"
80–3/4"
14" to 16"
24"
12
16'
75 to 123
8
209"
185"
70–3/4"
14" to 16"
24"
16
16'
147 to 170
8
209"
185"
70–3/4"
22" to 24"
24"
16
16'
198 to 223
8
215"
185"
70–3/4"
24" to 28"
30"
24
Approximate Concrete Required (Curb Type)
•
Ring
: Leg Ctr dia (in.) x actual Width (W-in.) x Actual Depth (T-in.) / 14,850 = cubic yards.
•
Center Pad
: Actual Ring inside dia (in.) x Actual Ring inside dia (in.) x Actual depth (in.) / 59,404 = cubic yards.
SMOOTHWALL BIN
