Grain Systems Tanks PNEG-1095 - Manual (Page 28)

5. Foundations
28 PNEG-1095 FCDL 4.00" Corrugation Externally Stiffened Grain Bin
Inverted “T” Foundation (3000 PSF Soil Bearing Capacity)
Instructions
1. Determine bearing capacity of soils by using geotechnical investigations. Found all footings on soils
of uniform bearing capacity.
2. All bins with a diameter of 60' or larger must use ASTM A615 grade 60 deformed bars for concrete
reinforcement. Bins with a diameter less than 60' must use ASTM A615 grade 40 deformed bars.
3. Concrete must have a minimum compressive strength of 3000 PSI at 28 days.
4. Foundation site should be free of vegetation and debris and be well drained.
5. The foundation should be founded below the frost line or founded on non-frost susceptible soils.
6. Lap all circumferential bars 35 bar diameters and stagger all laps in plan 3' 0".
7. All material used for backfill inside the ring wall should be a clean, well graded, crushed stone or a
sandgravel mixture. Backfill should be placed in 6" lifts and well compacted.
8. Estimates do not include end laps.
Figure 5K Inverted “T” Foundation