Monolithic pads, Foundations – Grain Systems Tanks PNEG-1094 User Manual
Page 22
5. Foundations
22
PNEG-1094 Farm Grain Bin - 4" Corrugation
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 5H 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
U/J Anchor Bolt
Radius
Anchor Chord
# of
Anchors
Total Cu. Yds.
Concrete
Sq. Ft.
Mesh
Length #6
Bar
** Optional #4 (ft.)
12'
6'-6"
6' - 3-1/4"
8' - 10-7/16"
4
4.0
300
100
200
15'
8'-0"
7 - 9-1/4"
9' - 1-1/2"
5
5.5
500
100
300
18'
9'-6"
9' - 3-1/16"
9' - 3-1/16"
6
7.5
700
200
400
21'
11'-2"
10' - 8-15/16"
9' - 3-15/16"
7
9.5
900
200
600
24'
12'-6"
12' - 2-7/8"
9' - 4-3/8"
8
12.0
1100
200
700
27'
14'-0"
13' - 8-3/4"
9' - 4-11/16"
9
14.5
1200
200
900
30'
15'-7"
15' - 2-11/16"
9' - 4-7/8"
10
17.5
1600
200
1100
33'
17'-0"
16' - 8-9/16"
9'-5"
11
20.5
1800
300
1300
36'
18'-8"
18' - 2-7/16"
9' - 5-1/16"
12
24.0
2300
300
1500