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PNEG-318
User Manual
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GSI PNEG-318 User Manual

PNEG-318
Concrete Foundation Recommendations for GSI Grain Bins
Instructions Manual
PNEG-318
Date: 06-27-13
• “FCDL” Series bins
• 4.00" (“W”) Series farm bins
• 2.66" (“N”) Series farm bins
• Inside stiffened commercial tanks
• Outside stiffened commercial tanks
• Commercial hopper tanks
Table of Contents

Contents

Chapter 1 Introduction ..........................................................................................................................................5
Chapter 2 General Foundation Requirements for GSI Bins ...............................................................................8
Requirements ................................... ............................................. ........................................................ 8
Selecting the Proper Site ...................................................................................................................... 8
Scribe the Diameter ............................................................................................................................... 8
Prepare the Foundation Forms ............................................................................................................. 9
Vane Axial Fan Pad ............................................................................................................................ 11
Centrifugal Fan Pad ............................................... ... .......................................................................... 12
Anchor Bolt Placement ........................................................................................................................ 13
FCDL Anchor Bolt Detail ..................................................................................................................... 14
Commercial Tank Anchor Bolt Detail .................................................................................................. 14
Outside Bin Hold-Down Details (Unstiffened 2.66" Corrugation) ........................................................ 15
Outside Bin Hold-Down Details (Unstiffened 4.00" Corrugation) ........................................................ 16
Chapter 3 FCDL Series Anchor Bolt Charts ......................................................................................................18
Chapter 4 Monolithic Pad FCDL .............................................. .... ... ... ... ..............................................................22
Floating Monolithic Pad for GSI FCDL Bins up to 5 Rings ......... ................................................ ......... 22
Chapter 5 Frost Free Pad FCDL ..........................................................................................................................24
Anchor Bolt Placement ........................................................................................................................ 24
Frost Free Pad (FCDL Bins) .................. ... ... .... ... ... ... .... ... ................................................................... 26
Chapter 6 Inverted “T” FCDL ..............................................................................................................................30
3000 PSF Soil Bearing Capacity ......................................................................................................... 30
Chapter 7 Monolithic Pad 4.00" Farm Bin ................................................ ... ... ... ... .... ... ... ... .... ... ... .......................34
Floating Monolithic Pad for Unstiffened GSI Bins up to 5 Rings (4.00" Corrugation) ....... .......... ......... 34
Chapter 8 Frost Free Pad Unstiffened 4.00" Farm Bin . ... ... ... .... .......................................................................36
Outside Bin Hold-Down Charts (4.00" Corrugation) ............................................................................ 36
Chapter 9 Monolithic Pad 2.66" Farm Bin ................................................ ... ... ... ... .... ... ... ... .... ... ... .......................42
Floating Monolithic Pad for Unstiffened GSI Bins up to 7 Rings (2.66" Corrugation) ....... .......... ......... 42
Chapter 10 Frost Free Pad Unstiffened 2.66" Farm Bin ...................................................................................44
Outside Bin Hold-Down Chart (2.66" Corrugation) ......................... ... ... .... ... ... ................................... 44
Chapter 11 Frost Free Pad Commercial Tank ...................................................................................................50
Chapter 12 Inverted “T” Foundation 2.66" Outside Stiffened Commercial Tanks .................................. ....... 56
3000 PSF Soil Bearing Capacity .......................................... .... ... ... ... ... .... ... ... ... .... ... ......................... 56
3500 PSF Soil Bearing Capacity .......................................... .... ... ... ... ... .... ... ... ... .... ... ......................... 65
4000 PSF Soil Bearing Capacity .......................................... .... ... ... ... ... .... ... ... ... .... ... ......................... 74
Chapter 13 T-Cap Foundation 2.66" Outside Stiffened Commercial Tanks ...................................................84
Chapter 14 Outside Universal Stiffened Anchor Bolt Charts ..........................................................................90
Outside Universal Stiffened Anchor Bolt Charts 2.66" Corrugation Commercial Tanks .................... 90
Chapter 15 Inverted “T” Foundation 4" Outside Stiffened (WCL Series) Commercial Tanks ......................98
3000 PSF Soil Bearing Capacity .......................................... .... ... ... ... ... .... ... ... ... .... ... ......................... 98
3500 PSF Soil Bearing Capacity .......................................... .... ... ... ... ... .... ... ... ... .... ... ....................... 103
4000 PSF Soil Bearing Capacity .......................................... .... ... ... ... ... .... ... ... ... .... ... ....................... 108
PNEG-318 Concrete Foundation Recommendations for GSI Grain Bins 3
Table of Contents
Chapter 16 WC Series Outside Universal Stiffened Anchor Bolt Charts ......................................................114
WC Series Outside Universal Stiffened Anchor Bolt Charts 4" Corrugation Commercial Tanks ..... 114
Chapter 17 Concrete Foundation Commercial Hopper Tanks .......................................................................124
12' Diameter Commercial Hopper Tank Foundation up to 12 Rings ............................................... 124
12' Diameter Commercial Hopper Tank Foundation for 13-17 Rings .............................................. 125
15' Diameter Commercial Hopper Tank Foundation up to 12 Rings ............................................... 126
15' Diameter Commercial Hopper Tank Foundation for 13-17 Rings .............................................. 127
18' Diameter Commercial Hopper Tank Foundation up to 12 Rings ............................................... 128
18' Diameter Commercial Hopper Tank Foundation for 13-19 Rings .............................................. 129
21' Diameter Commercial Hopper Tank Foundation up to 12 Rings ............................................... 130
21' Diameter Commercial Hopper Tank Foundation for 13-19 Rings .............................................. 131
24' Diameter Commercial Hopper Tank Foundation up to 12 Rings ............................................... 132
24' Diameter Commercial Hopper Tank Foundation for 13-19 Rings .............................................. 133
27' Diameter Commercial Hopper Tank Foundation up to 12 Rings ............................................... 134
27' Diameter Commercial Hopper Tank Foundation for 13-19 Rings .............................................. 135
30' Diameter Commercial Hopper Tank Foundation up to 12 Rings ............................................... 136
30' Diameter Commercial Hopper Tank Foundation for 13-19 Rings .............................................. 137
36' Diameter Commercial Hopper Tank Foundation up to 18 Rings ............................................... 138
36' Diameter Commercial Hopper Tank Foundation for 19-22 Rings .............................................. 140
Chapter 18 Frost Free Foundation 4.00" FCHT Hopper Tanks ......................................................................144
18' Diameter FCHT Hopper Tank Foundation .................................... ............................................. 144
21' Diameter FCHT Hopper Tank Foundation .................................... ............................................. 145
24' Diameter FCHT Hopper Tank Foundation .................................... ............................................. 146
Chapter 19 Commercial Tank Foundation Tunnels ........................................................................................148
4 x 4 Tunnels ................................................................................................................................... 148
6' Wide Tunnels ............................................................................................................................... 155
Chapter 20 Foundation Recommendations BFT/GHT Series ........................................................................160
Chapter 21 Warranty ..........................................................................................................................................179
4 PNEG-318 Concrete Foundation Recommendations for GSI Grain Bins

1. Introduction

ATTENTION: READ BEFORE USING THIS MANUAL
All instructions should be construed as recommendations only. Because actual installation will vary according to local conditions, The GSI Group, Inc. assumes no liability for the results arising from the use of such recommendations.
Always make sure to use the correct tables and charts for the bin and soil conditions at building site. Determine the following before using this manual:
Bin Style
1. FCDL Series
2. “W” Series farm bin (4.00" corrugation)
3. “N” Series farm bin (2.66" corrugation)
4. NCL Inside stiffened commercial tanks
5. NCL Outside stiffened commercial tanks
6. WCL Outside stiffened commercial tanks
7. Commercial hopper tanks
8. BFT/GHT Unstiffened hopper tanks
Foundation Style
1. Floating monolithic pad
2. Frost free pad
3. Inverted “T” foundation or T-Cap
In-Foundation Aeration Systems
1. Tunnel sizing and forming
2. Transition opening requirements
If a foundation for the bin height is not provided, always use the foundation for the next taller tank.
NOTE: A “frost free” pad does not mean the foundation will not shift or be damaged by freezing and
thawing. It is only a term used by GSI to describe that foundation. Always use the inverted “T” foundation for frost-susceptible soils.
GSI Engineering also has recommendations available for the following foundation options:
1. Hopper cones
2. Tunnels
3. Seismic specifications
4. In-foundation aeration system
PNEG-318 Concrete Foundation Recommendations for GSI Grain Bins 5
1. Introduction
Reinforcement Bar Properties
Standard Nominal Dimensions
Bar Designation
Number
3 0.367 3/8" (9) 0.110 4 0.668 1/2" (13) 0.200 5 1.043 1-5/8" (16) 0.310 6 1.502 3/4" (19) 0.440 7 2.044 7/8" (22) 0.600 8 2.670 1" (25) 0.790
NOTES: Lap all circumferential bars 35 diameters and stagger all laps in plan 3' 0".
All reinforcement bar estimates do not include end laps.
Weight
per Foot (lb.)
Diameter in. (mm.)
Cross Sectional
Area (sq. in.)
General Foundation
Requirements for GSI Bins
®
Section 02
PNEG-318 Concrete Foundation Recommendations for GSI Grain Bins 7

2. General Foundation Requirements for GSI Bins

Requirements
The following construction related notes pertain to the installation of farm bin foundations.
Selecting the Proper Site
The selected site should be level, firm and free from underlying debris. The bin can be installed satisfactorily on slopes, but as the slope increases, additional labor and materials are required for the foundation. The concrete foundation surface must be level. If some fill is required, it should be watered and tamped thoroughly to prevent uneven settling from the weight of the bin. Naturally, the site must allo w convenient access for easy loading and unloading, plus provide additional space for future units. Also consider the positioning of handling equipment, availability of electricity and placement of fans, heaters and gas tanks.
All foundation specifications should 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.
Scribe the Diameter (See Figure 2A.)
After determining the center of the site, drive a small 2 x 4 in the ground to mark the center point of the foundation. The top of the stake should be the same height as the finished foundation will be. Using one large spike, nail a straight 2 x 4 (approximately 2' longer than the radius of the bin) to the top of the center stake. The swiveling 2 x 4 will act as a compass, enabling you to scribe the correct diameter of the foundation and later locate the anchor and stiffener bolt locations. (NOTE: Making the 2 x 4 two feet (2') longer than the radius will allow the 2 x 4 to also be used as a leveling device and for pulling concrete.)
Figure 2A Scribe the Diameter
2. General Foundation Requirements for GSI Bins
Carpenter’s level
Footing trench
Prepare the Foundation Forms
After scribing the diameter of the foundation, proceed by digging the foundation’s footing. This consists of a large circular trench dug just inside the foundation line. (Refer to foundation details (frost free pad, inverted “T” and T-Cap) of corresponding bins and tanks in this manual for necessary information.) Once the footing has been dug, you are ready to build the forms. It is most important that the form be rigid enough to hold its shape against the poured concrete. Also, the foundation must be flat. Sloped floors cannot be used in drying bins. A carpenter’s level placed atop the compass 2 x 4 will enable you to set the top of the forms to match the top of the center stake. a uniform elevation for the entire foundation. The foundation should be level within 1/8" on non-stiffened tanks and 1/4" on stiffened tanks at bin wall perimeter. Stiffened tanks must be shimmed level.
(See Figure 2B.)
Check the form work with a transit to ensure
Figure 2B Level the Forms
Alternate Foundation Forms
There are two (2) styles of foundation forms commonly used. The first is the circular form shown in
Figure 2B. The second style of foundation can be made of 2" x 8" boards set into a square with the corners
blocked off to form an octagon. (See Figure 2C on Page 10.) This eight (8) sided form will approximate a circle and can also be constructed easily.
PNEG-318 Concrete Foundation Recommendations for GSI Grain Bins 9
2. General Foundation Requirements for GSI Bins
Figure 2C Alternate Foundation Form
Place the Reinforcement
Once the forms and trench have been prepared, begin the placement of reinforcement rods at various levels in the foundation’s footing. See the appropriate charts and drawings in this manual for the bin to determine requirements and positions of the reinforcement. The reinforcement rods offer their greatest strength when lapped properly and connected by wiring or welding. Next, place a minimum of 2" of compacted sand on the inside section of the foundation to provide a good base for the concrete and protect against rodents. The sand should then be covered with 4 mil polyethylene plastic, which will act as a moisture barrier. Two (2) layers of 6 x 6 wire mesh should then be added to the entire area of the foundation to complete the preparation of the bin’s foundation.
2. General Foundation Requirements for GSI Bins
TR-4734
A = 20" for fans without heaters A = 44" for fans with heaters
TR-6918 and TR-6919
A = 32" for fans without heaters A = 56" for fans with heaters
TR-7048
A = 45" for fans without heaters A = 69" for fans with heaters
Vane Axial Fan Pad
Placement of the Fan Pad: Transitions/Fans/Heaters Only.
If a fan or fan and heater will be installed, refer to Figure 2D to determine the concrete pad size.
1. The top of this pad should be level with the top of the bin’s foundation.
2. Recommended pad thickness is 4" minimum.
3. Front of pad should be perpendicular to bin wall.
4. Pad for heater not required, but if it is to added, pour the pad to cover both locations.
For fans and transitions used in aeration duct system applications, refer the transition and aeration installation instructions.
IMPORTANT: Fan pad and fan must be level and smooth for proper operation. Vibration problems can
result from improper fan leveling.
PNEG-318 Concrete Foundation Recommendations for GSI Grain Bins 11
Figure 2D
2. General Foundation Requirements for GSI Bins
CAUTION
Fan pad and fan must be level and smooth for proper operation. Vibration problems can result from improper fan leveling.
Front of pad should be perpendicular to bin wall. Recommended thickness for fan pad is 4" minimum. Surface of pad should be 2" below the bin foundation. Pad for heater not required.
TR-4734
A = 20" without heater A = 44" with heater B = 10" C = 40" D = 40"
TR-7048
A = 45" without heater A = 69" with heater B = 10" C = 40" D = 48"
TR-6918 and TR-6919
A = 32" without heater A = 65" with heater B = 13" C = 48" D = 52"
TR-7049
A = 45" without heater A = 78" with heater B = 13" C = 48" D = 52"
TR-6207
A = 42" without heater A = 78" with heater B = 13" C = 48" D = 60"
TR-6958
A = 55" without heater A = 85" with heater B = 13" C = 48" D = 60"
TR-6853 (Double inlet)
A = 54" without heater A = 88" with heater B = 28" C = 100" D = 60"
TR-4013
A = 36" without heater B = 13" C = 48" D = 60"
TR-6944
A = 48" without heater B = 13" C = 48" D = 60"
Centrifugal Fan Pad
1. Fan pad should be poured 2" below the top of the bin foundation for all centrifugal fans.
2. A pad for heaters is not required, but is recommended.
3. Recommended pad thickness is 4".
4. If a downwind heater pad is to be installed, the pad width (“C”) should be 48" and extended toward the bin by 33".
5. Fan discharge should be centered on centerline of bin.
6. The fan pad should be perpendicular to bin wall.
Figure 2E Centrifugal Fan Pad
2. General Foundation Requirements for GSI Bins
Anchor Bolt Placement
Having poured and leveled the concrete, use the center stake and straight 2 x 4 again to find the bolt circle radius for the outside hold-down brackets. Select a starting point and stretch a pre-measured chord along the imaginary circle formed by the bolt circle radius. Take into consideration the placement of these bolts so as not to interfere with the positions of bin doors and transitions. (Refer to charts on Pages 18-20 for necessary radii and chord lengths.) Take the time and work carefully: ACCURACY IS IMPORTANT.
FOR STIFFENER ANCHOR BOLT LOCATIONS ON COMMERCIAL TANKS, REFER TO COMMERCIAL TANK SECTION IN THIS MANUAL OR CALL THE GSI ENGINEERING DEPARTMENT.
NOTE: Top edge of slab where the bin wall sets must be held to within 1/8" of level.
Figure 2F Anchor Bolt Placement
PNEG-318 Concrete Foundation Recommendations for GSI Grain Bins 13
2. General Foundation Requirements for GSI Bins
FCDL Anchor Bolt Detail
Figure 2G FCDL Anchor Bolt Detail
Commercial Tank Anchor Bolt Detail
Figure 2H Commercial Tank Anchor Bolt Detail
NOTE: This is a general case anchor b olt detail. Some situations, conditions and storage tanks may have
different anchor bolt or anchoring requirements.
2. General Foundation Requirements for GSI Bins
Outside Bin Hold-Down Details (Unstiffened 2.66" Corrugation)
Figure 2I Single Anchor Bolt
Figure 2J U-Bolt/J-Bolt Combination
Outside bin hold-downs should be used on all non-stiffened bins/silos. When anchoring the bin, be sure the vertical seams of the bin/silo align with the U-bolts or single anchor bolts in the foundation. Bin/silos up to 36' diameter and 12 rings tall or shorter may be anchored using either the U-bolt/J-bolt combina tion or the single anchor bolt. Bin/silos 42' and greater in diameter and all 13 rings or taller sh ould be anchored using the single anchor bolt. Bins/silos 13 rings and taller require double hold-downs. The sidewall must be field drilled to attach the hold-down bracket located between the horizontal seams. For the case of 42' and larger bin/silo, no greater than 12 rings tall, double U-bolt/J-bolt combination anchors may be used as an option to the single anchors bolt. Additional hold-downs are required with this option.
PNEG-318 Concrete Foundation Recommendations for GSI Grain Bins 15
2. General Foundation Requirements for GSI Bins
Outside Bin Hold-Down Details (Unstiffened 4.00" Corrugation)
Figure 2K Single Anchor Bolt
Outside bin hold-downs should be used on all non-stiffened GSI bins. When anchoring the bin, be sure the vertical seams of the bin align with the U-bolts in the foundation. They may be anchored to the foundation using either the U-bolt and J-bolt combination or the single anchor bolt, except on 42' diameter and larger bins and bins 10 rings tall.
NOTE: All non-stiffened 42' and larger bins and bins 10 rings tall should use single anchor bolts, not the
U-bolt/J-bolt combination. (Double U-bolt/J-bolt may be used on non-stiffened 42' and larger bins, no greater than 9 rings tall as an option.)
Figure 2L U-Bolt/J-Bolt Combination
FCDL Series
Anchor Bolt Charts
®
Section 03
PNEG-318 Concrete Foundation Recommendations for GSI Grain Bins 17

3. FCDL Series Anchor Bolt Charts

The dimensions in this chart on Pages 18-20 apply only to the FCDL series. For WC or NC series commercial tanks, refer the appropriate section of PNEG-318.
Refer to proper chart on Pages 18-20 to find the anchor chord that corresponds to the bin that is going to be built.
Start with one anchor bolt and work from it to the left to locate one qua rter of the anchor bolts, then to the right to locate another quarter of the bolts. Now work off of the last anchor bolt s in each quarter t o lo cate remaining anchor bolts in the last two (2) quarters.
Figure 3A
Anchor Bolt Charts
12' Diameter Bin 15' Diameter Bin
Bolt Radius 6' - 3-1/4'' Bolt Qty. 8 Bolt Radius 7' - 9-1/8'' Bolt Qty. 10
Chord # Chord Dist. Chord # Chord Dist.
1 4' - 9-5/8'' 1 4' - 9-9/16'' 2 8' - 10-7/16'' 2 9' - 1-1/2'' 3 11' - 7-1/16" 3 12' - 6-11/16''
3. FCDL Series Anchor Bolt Charts
18' Diameter Bin 21' Diameter Bin
Bolt Radius 9' - 3-1/16'' Bolt Qty. 12 Bolt Radius 10' - 8-15/16" Bolt Qty. 14
Chord # Chord Dist. Chord # Chord Dist.
1 4' - 9-1/2" 1 4' - 9-3/8" 2 9' - 3-1/16" 2 9' - 3-7/8" 3 13' - 1-1/16" 3 13' - 4-13/16" 4 16' - 0-3/8" 4 16' - 9-5/8"
24' Diameter Bin 27' Diameter Bin
Bolt Radius 12' - 2-7/8'' Bolt Qty. 16 Bolt Radius 13' - 8-3/4" Bolt Qty. 18
Chord # Chord Dist. Chord # Chord Dist.
1 4' - 9-5/16" 1 4' - 9-3/16" 2 9' - 4-7/16" 2 9' - 4-11/16" 3 13' - 7-3/16" 3 13' - 8-3/4" 4 17' - 3-11/16" 4 17' - 7-13/16" 5 20' - 4-1/4" 5 21'-7/16"
30' Diameter Bin 33' Diameter Bin
Bolt Radius 15' - 2-11/16'' Bolt Qty. 20 Bolt Radius 16' - 8-9/16" Bolt Qty. 22
Chord # Chord Dist. Chord # Chord Dist.
1 4' - 9-3/16" 1 4' - 9-1/16" 2 9' - 4-15/16" 2 9'-5" 3 13' - 9-7/8" 3 13' - 10-5/8" 4 17' - 10-3/4" 4 18'-7/8" 5 21' - 6-3/8" 5 21' - 10-11/16" 6 24' - 7-5/8" 6 25' - 3-1/8"
36' Diameter Bin 42' Diameter Bin
Bolt Radius 18' - 2-1/2'' Bolt Qty. 24 Bolt Radius 21' - 2-5/16'' Bolt Qty. 28
Chord # Chord Dist. Chord # Chord Dist.
1 4' - 9-1/16" 1 4 ' - 8-15/16" 2 9' - 5-1/8" 2 9' - 5-3/16" 3 13' - 11-1/4" 3 14'-0" 4 18' - 2-1/2" 4 1 8' - 4-11/16" 5 22'-2" 5 22' - 6-5/8" 6 25'-9" 6 26' - 5-1/8" 7 28' - 10-11/16" 7 29' - 11-5/8" 8 31' - 6-7/16" 8 33' - 1-11/16"
PNEG-318 Concrete Foundation Recommendations for GSI Grain Bins 19
3. FCDL Series Anchor Bolt Charts
48' Diameter Bin 54' Diameter Bin
Bolt Radius 24' - 2-1/8'' Bolt Qty. 32 Bolt Radius 27' - 1-15/16'' Bolt Qty. 36
Chord # Chord Dist. Chord # Chord Dist.
1 4' - 8-7/8" 1 4' - 8-13/16" 2 9' - 5-3/16" 2 9' - 5-3/16" 3 14' - 7/16" 3 14' - 11/16" 4 18' - 6-1/16" 4 18' - 6-15/16" 5 22' - 9-1/2" 5 22' - 11-1/2" 6 26' - 10-3/8" 6 27' - 1-15/16" 7 30' - 8-1/8" 7 31' - 1-7/8" 8 34' - 2-5/16" 8 34'-11"
9 37' - 4-9/16"
Bolt Radius 30' - 1-3/4" Bolt Qty. 40
Chord # Chord Dist.
1 4' - 8-3/4" 2 9' - 5-3/16" 3 14'-7/8" 4 18' - 7-9/16" 5 23'-7/8" 6 27' - 4-7/16" 7 31'-6" 8 35' - 5-1/4"
9 39' - 1-7/8" 10 42' - 7-9/16" 11 45' - 10-1/8"
9 38' - 4-15/16"
10 41' - 7-3/8"
60' Diameter Bin
Figure 3B Anchor Bolt Detail (Typical)
Floating Monolithic Pad Recommendations
for FCDL and FCRL Series Bins
®
Section 04
PNEG-318 Concrete Foundation Recommendations for GSI Grain Bins 21

4. Monolithic Pad FCDL

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.
Floating Monolithic Pad for GSI FCDL Bins up to 5 Rings
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 4A
* 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
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 12-1/2 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 21-1/2 1800 300 1300 36' 18'-9'' 18' - 2-1/2'' 4' - 9-1/16'' 24 25 2300 300 1500
Outside
Radius
Single Bolt
Radius
Anchor Chord # of Anchors
Total Cu. Yds.
Concrete
Sq. Ft.
Mesh
Length #6
Bar
Optional #4
Grid (ft.)
Frost Free Pad Recommendations
for FCDL and FCRL Series Bin
®
Section 05
PNEG-318 Concrete Foundation Recommendations for GSI Grain Bins 23

5. Frost Free Pad FCDL

Anchor Bolt Placement
Having poured and leveled the concrete, use the center stake and straight 2 x 4 again to find the bolt circle radius for the outside hold-down brackets. Select a starting point and stretch a pre-measure d chord along the imaginary circle formed by the bolt circle radius. Take into consideration the placement of these bolts so as not to interfere with the positions of bin doors and transitions. (Refer to following chart below for necessary radii and chord lengths.) Take the time and work carefully since accuracy is important.
NOTE: Top edge of slab where the bin wall sets must be held to within 1/8" of level.
Figure 5A
NOTE: Refer to chapter 4 on Page 21 for additional anchor details.
Bin Diameter “B” Bolt Circle Radius # of Anchors “E” Chord Distance
12' 6' - 3-1/4" 8 4' - 9-5/8" 15' 7' - 9-1/8" 10 4' - 9-9/16" 18' 9' - 3-1/16" 12 4' - 9-1/2" 21' 10' - 8-15/16" 14 4' - 9-3/8" 24' 12' - 2-7/8" 16 4' - 9-5/16" 27' 13' - 8-3/4" 18 4' - 9-3/16" 30' 15' - 2-11/16" 20 4' - 9-3/16" 33' 16' - 8-9/16" 22 4' - 9-1/16" 36' 18' - 2-1/2" 24 4' - 9-1/16" 42' 21' - 2-5/16" 28 4' - 8-15/16" 48' 24' - 2-1/8" 32 4' - 8-7/8" 54' 27' - 1-15/16" 36 4' - 8-3/16" 60' 30' - 1-3/4" 40 4' - 8-3/4"
For stiffener anchor bolt locations on commercial tanks, refer to commercial tank section found later in this manual or call the GSI engineering department.
5. Frost Free Pad FCDL
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.
Frost Free 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.
* Contact GSI Engineering for heights greater than 6". ** The optional #4 rebar grid can be substituted for the wire mesh in most ca ses. Place the #4 bars
in the pad at 18" c/c each way.
PNEG-318 Concrete Foundation Recommendations for GSI Grain Bins 25
Figure 5B
5. Frost Free Pad FCDL
Frost Free Pad (FCDL Bins)
(Refer to Figure 5A on Page 24.)
Diameter of Bin: 12' Corrugation: 4.00"
Ring # B N
6 1 ft. 0 in. 2 6 f t. 9 in. 300 200 100 5
7, 8 1 ft. 7 in. 2 6 ft. 9 in. 300 200 100 5
9, 10 2 ft. 0 in. 2 7 ft. 0 in. 300 200 200 6
1 1, 12 2 ft. 10 in. 3 7 ft. 6 in. 300 200 300 8
Diameter of Bin: 15' Corrugation: 4.00''
Ring # B N
6 1 ft. 0 in. 2 8 ft. 3 in. 400 300 100 6
7, 8 1 ft. 7 in. 2 8 ft. 3 in. 400 300 100 7
9, 10 2 ft. 0 in. 2 8 ft. 7 in. 400 300 200 8
11, 12 2 ft. 0 in. 2 8 ft. 7 in. 400 300 200 8
Outside
Radius
Outside
Radius
Sq. Ft. Mesh
6 x 6 - 6/6
Sq. Ft. Mesh
6 x 6 - 6/6
Optional #4
18" x 18" Grid (ft.)
Optional #4
18'' x 18'' Grid (ft.)
Length #6
Bar (ft.)
Length #6
Bar (ft.)
Total Cu. Yds.
Concrete
Total Cu. Yds.
Concrete
Diameter of Bin: 18' Corrugation: 4.00''
Ring # B N
6 1 ft. 0 in. 2 9 ft. 9 in. 500 400 200 8
7, 8 1 ft. 7 in. 2 9 ft. 9 in. 500 400 200 9
9 2 ft. 0 in. 2 10 ft. 1 in. 500 400 200 11
11, 12 2 ft. 6 in. 3 10 ft. 6 in. 5 00 400 300 12
Diameter of Bin: 21' Corrugation: 4.00''
Ring # B N
6 1 ft. 1 in. 2 11 ft. 3 in. 700 500 200 11
7, 8 1 ft. 7 in. 2 11 ft. 3 in. 700 500 200 12
9, 10 2 ft. 0 in. 2 11 ft. 6 in. 700 500 300 13
1 1 , 12 2 ft. 6 in. 3 11 ft. 9 in. 700 500 400 15
Diameter of Bin: 24' Corrugation: 4.00''
Ring # B N
6 1 ft. 1 in. 2 12 ft. 9 in. 900 600 200 13
7, 8 1 ft. 9 in. 2 12 ft. 9 in. 900 600 200 15
Outside
Radius
Outside
Radius
Outside
Radius
Sq. Ft. Mesh
6 x 6 - 6/6
Sq. Ft. Mesh
6 x 6 - 6/6
Sq. Ft. Mesh
6 x 6 - 6/6
Optional #4
18'' x 18'' Grid (ft.)
Optional #4
18'' x 18'' Grid (ft.)
Optional #4
18'' x 18'' Grid (ft.)
Length #6
Bar (ft.)
Length #6
Bar (ft.)
Length #6
Bar (ft.)
Total Cu. Yds.
Total Cu. Yds.
Concrete
To tal Cu. Yds.
Concrete
Concrete
9, 10 2 ft. 6 in. 3 13 ft. 2 in. 900 600 400 18
11, 12 2 ft. 9 in. 3 13 ft. 4 in. 900 600 500 18
5. Frost Free Pad FCDL
Frost Free Pad (FCDL Bins) (Continued)
(Refer to Figure 5A on Page 24.)
Diameter of Bin: 27' Corrugation: 4.00''
Ring # B N
6 1 ft. 2 in. 2 14 ft. 3 in. 1100 800 200 16
7, 8 1 ft. 10 in. 2 14 ft. 4 in. 1100 800 200 18
9, 10 2 ft. 7 in. 3 14 ft. 7 in. 1100 800 500 21
Diameter of Bin: 30' Corrugation: 4.00"
Ring # B N
6 1 ft. 2 in. 2 15 ft. 9 in. 1400 900 200 19
7, 8 1 ft. 10 in. 2 15 ft. 10 in. 1400 900 200 21
9, 10 2 ft. 8 in. 3 16 ft. 1 in. 1400 900 500 25
11, 12 3 ft. 8 in. 4 16 ft. 5 in. 1400 900 700 29
Outside
Radius
Outside
Radius
Sq. Ft. Mesh
6 x 6 - 6/6
Sq. Ft. Mesh
6 x 6 - 6/6
Optional #4
18'' x 18'' Grid (ft.)
Optional #4
18" x 18" Grid (ft.)
Length #6
Bar (ft.)
Length #6
Bar (ft.)
T otal Cu. Yds.
Concrete
Total Cu. Yds.
Concrete
Diameter of Bin: 33' Corrugation: 4.00"
Ring # B N
6 1 ft. 3 in. 2 17 ft. 3 in. 1700 1100 300 23
7, 8 1 ft. 11 in. 2 17 ft. 4 in. 1700 1100 300 25
9, 10 2 ft. 9 in. 3 17 ft. 6 in. 1700 1100 600 29
11, 12 3 ft. 10 in. 4 18 ft. 0 in. 1700 1100 800 34
Diameter of Bin: 36' Corrugation: 4.00"
Ring # B N
6 1 ft. 3 in. 2 18 ft. 9 in. 2000 1300 300 26
7, 8 2 ft. 0 in. 2 18 ft. 11 in. 2000 1300 400 30
9, 10 2 ft. 10 in. 3 19 ft. 0 in. 2000 1300 600 33
11, 12 3 ft. 11 in. 4 19 ft. 6 in. 2000 1300 900 39
13 4 ft. 10 in. 5 19 ft. 9 in. 2000 1300 1100 43
Diameter of Bin: 42' Corrugation: 4.00"
Ring # B N
6 1 ft. 4 in. 2 21 ft. 8 in. 2600 1800 300 34
7, 8 2 ft. 1 in. 3 21 ft. 11 in. 2600 1 800 700 39
9 3 ft. 1 in. 4 22 ft. 2 in. 2600 1800 900 44
10, 11 4 ft. 2 in. 5 22 ft. 7 in. 2600 1800 1200 50
12, 13 4 ft. 10 in. 5 22 ft. 11 in. 2600 1800 1300 54
14 5 ft. 6 in. 6 23 ft. 2 in. 2600 1800 1500 66
Outside
Radius
Outside
Radius
Outside
Radius
Sq. Ft. Mesh
6 x 6 - 6/6
Sq. Ft. Mesh
6 x 6 - 6/6
Sq. Ft. Mesh
6 x 6 - 6/6
Optional #4
18" x 18" Grid (ft.)
Optional #4
18" x 18" Grid (ft.)
Optional #4
18" x 18" Grid (ft.)
Length #6
Bar (ft.)
Length #6
Bar (ft.)
Length #6
Bar (ft.)
Total Cu. Yds.
Concrete
Total Cu. Yds.
Concrete
Total Cu. Yds.
Concrete
PNEG-318 Concrete Foundation Recommendations for GSI Grain Bins 27
5. Frost Free Pad FCDL
Frost Free Pad (FCDL Bins) (Continued)
(Refer to Figure 5A on Page 24.)
Diameter of Bin: 48' Corrugation: 4.00"
Ring # B N
6 1 ft. 5 in. 2 24 ft. 8 in. 3400 2300 400 44
7, 8 2 ft. 3 in. 3 24 ft. 11 in. 3400 2300 800 49
9 3 ft. 3 in. 4 25 ft. 2 in. 3400 2300 1100 55 10, 11 4 ft. 5 in. 5 25 ft. 8 in. 3400 2300 1400 63 12, 13 5 ft. 1 in. 5 25 ft. 11 in. 3400 2300 1500 67
14 5 ft. 8 in. 6 26 ft. 2 in. 5400 2300 1700 72
Diameter of Bin: 54' Corrugation: 4.00"
Ring # B N
6 1 ft. 5 in. 2 27 ft. 9 in. 4800 3300 400 56
7, 8 2 ft. 3 in. 3 28 ft. 1 in. 4800 3300 600 63
9, 10 3 ft. 3 in. 4 28 ft. 4 in. 4800 3300 700 69
11, 12 4 ft. 5 in. 4 28 ft. 7 in. 4800 3300 1400 75
13, 14 6 ft. 0 in. 6 29 ft. 2 in. 4800 3300 1900 87
Outside
Radius
Outside
Radius
Sq. Ft. Mesh
6 x 6 - 6/6
Sq. Ft. Mesh
6 x 6 - 6/6
Optional #4
18" x 18" Grid (ft.)
Optional #4
18" x 18" Grid (ft.)
Length #6
Bar (ft.)
Length #6
Bar (ft.)
Total Cu. Y ds.
Concrete
Total Cu. Yds.
Concrete
Diameter of Bin: 60' Corrugation: 4.00"
Ring # B N
6 1 ft. 6 in. 2 30 ft. 7 in. 5400 3600 400 65
7, 8 2 ft. 10 in. 3 31 ft. 3 in. 5400 3600 1100 77
9, 10 3 ft. 8 in. 4 31 ft. 7 in. 5400 3600 1400 82
11, 12 4 ft. 7 in. 5 31 ft. 9 in. 5400 3600 1700 91
13 6 ft. 1 in. 6 32 ft. 4 in. 5400 3600 2200 103
Outside
Radius
Sq. Ft. Mesh
6 x 6 - 6/6
Optional #4
18" x 18" Grid (ft.)
Length #6
Bar (ft.)
Total Cu. Yds.
Concrete
Inverted “T” Foundation
Recommendations for
FCDL and FCRL Series Bin
®
Section 06
PNEG-318 Concrete Foundation Recommendations for GSI Grain Bins 29

6. Inverted “T” FCDL

All foundation 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.
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 6A Inverted “T” Foundation
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