Grain Systems Tanks PNEG-1095 - Manual (Page 24)

5. Foundations
24 PNEG-1095 FCDL 4.00" Corrugation Externally Stiffened Grain Bin
Floating Monolithic Foundation Pad for Bins with up to 5 Rings
Monolithic Pads
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.
1. The foundation site must be free of vegetation and debris and be well drained.
2. The foundation must be founded below the frost line or placed on non expansive frost free fill.
3. All material used for backfill inside the ring wall should be clean, well graded, crushed rock or a sand
and gravel mixture. Backfill should be placed in 6" lifts, 95% compaction.
4. All reinforcement must meet the requirements of ASTM A615 grade 60 deformed bars.
5. Lap all circumferential bars 35 bar diameters and stagger all laps in plans 3'-0". Estimates do not
include end laps.
6. Concrete must have a minimum compressive strength of 3000 PSI at 28 days, 6%-8% air
entrainment, 4" slump.
Figure 5I Floating Monolithic Pad for Bins up to 5 Rings
* Contact the manufacturer’s engineering department 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
Single Bolt
Radius
Anchor Chord # of Anchors
Total Cu. Yds.
Concrete
Sq. Ft.
Mesh
Length #6
Bar
Optional #4
Grid (ft.)
12' 6'-9'' 6' - 3-1/4'' 4' - 9-5/8'' 8 4.5 300 100 200
15' 8'-3'' 7' - 9-1/8'' 4' - 9-9/16'' 10 6 500 100 300
18' 9'-9'' 9' - 3-1/16'' 4' - 9-1/2'' 12 8 700 200 400
21' 11'-3'' 10' - 8-15/16'' 4' - 9-3/8'' 14 10 900 200 600
24' 12'-9" 12' - 2-7/8'' 4' - 9-5/16'' 16 12.5 1100 200 700
27' 14'-3" 13' - 8-3/4'' 4' - 9-3/16'' 18 15 1200 200 900
30' 15'-9'' 15' - 2-11/16'' 4' - 9-3/16'' 20 18 1600 200 1100
33' 17'-3'' 16' - 8-9/16'' 4' - 9-1/16'' 22 21.5 1800 300 1300
36' 18'-9'' 18' - 2-1/2'' 4' - 9-1/16'' 24 25 2300 300 1500