Grain Systems Bin Accessories PNEG-318 - Manual (Page 56)

56 PNEG-318 Concrete Foundation Recommendations for GSI Grain Bins
12. Inverted “T” Foundation 2.66" Outside Stiffened Commercial Tanks
3000 PSF Soil Bearing Capacity
Inverted “T” Foundation Notes:
1. The foundation design is based on a minimum allowable soil bearing capacity of 3000 PSF.
Bearing capacity of the soils should be determined by geotechnical investigation and be of
uniform bearing capacity.
2. The foundation site must be free of vegetation and debris and well drained.
3. The foundation must be founded below the frost line or constructed on non-expansive frost free fill.
4. All material used for backfill inside the ring wall should be clean, well graded, crushed rock or a
sand-gravel mixture. Backfill should be placed in 6" lifts, 95% compaction.
5. All reinforcement must meet the requirements of ASTM A615 grade 60 deformed bars.
6. Lap all circumferential bars 35 bar diameters and stagger all laps in plans 3'-0". Estimates do not
include end laps.
7. Concrete must have a minimum compressive strength of 3000 PSI at 28 days, 6%-8% air
entrainment, 4" slump.
Figure 12A
All foundation specifications shall be construed as
recommendations only. Because of the many
variable conditions in actual installation, GSI
assumes no liability for results arising
from the use of such recommendations.