Grain Systems Bin Accessories PNEG-318 - Manual (Page 42)

42 PNEG-318 Concrete Foundation Recommendations for GSI Grain Bins
9. Monolithic Pad 2.66" Farm Bin
Floating Monolithic Pad for Unstiffened GSI Bins up to 7 Rings
(2.66" Corrugation)
Monolithic Pad 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 9A
* Contact GSI Engineering for heights greater than 6".
** The optional #4 rebar grid can be substituted for the wire mesh in most cases. Place the #4 bars
in the pad at 18" c/c each way.
Bin
Diameter
Outside
Radius
U/J Anchor
Bolt Radius
Anchor Chord # of Anchors
Total Cu. Yds.
Concrete
Sq. Ft.
Mesh
Length
#6 Bar
Optional #4
Grid (ft.)
12' 6'-6'' 6' - 2-3/16'' 8' - 8-7/8'' 4 4.0 300 100 200
15' 8'-0'' 7' - 8-1/16'' 9' - 0-1/4'' 5 5.5 500 100 300
18' 9'-6'' 9'-2'' 9'-2'' 6 7.5 700 200 400
21' 11'-2'' 10' - 7-7/8'' 9'-3'' 7 9.5 900 200 600
24' 12'-6" 12' - 1-13/16'' 9' - 3-5/8'' 8 12.0 1100 200 700
27' 14'-0" 13' - 7-11/16'' 9'-4'' 9 14.5 1200 200 900
30' 15'-7'' 15' - 1-5/8'' 9' - 4-1/4'' 10 17.5 1600 200 1100
33' 17'-0'' 16' - 7-1/2'' 9' - 4-3/8'' 11 20.5 1800 300 1300
36' 18'-8'' 18' - 1-3/8'' 9' - 4-1/2'' 12 24.0 2300 300 1500
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.