Grain Systems Bin Accessories PNEG-318 - Manual (Page 151)

19. Commercial Tank Foundation Tunnels
PNEG-318 Concrete Foundation Recommendations for GSI Grain Bins 151
72' Maximum Sidewall Height (27 Rings 2.66" Corrugation) 3000 PSI
Concrete at 28 Days ASTM A615 Grade 60 Deformed Reinforcement Bar
1. Lap all bars 35 bar diameters and stagger all laps in plan 3'-0".
2. Material estimates are approximations only. Estimates do not include allowances for reinforcement
bar overlaps, concrete shrinkage or material waste.
3. Reference drawing 4 x 4 - 72' for construction details and rebar/beam drawing for rebar/beam details.
4. Concrete should have a minimum compressive strength of 3000 PSI at 28 days.
5. Based on a soil bearing capacity of 3500 PSF.
When a tunnel is added to the inverted “T” foundation, increased stemwall height is required in all cases.
The footer must be kept below the frost line to minimize movement.
Diameter #4 Rebar #5 Rebar #6 Rebar Concrete
Ft. Ft. Lbs. Ft. Lbs. Ft. Lbs. Yd^3
30 1300 868 400 417 600 901 25
33 1400 935 500 522 600 901 27
36 1500 1002 500 522 600 901 30
39 1700 1136 600 626 700 1051 32
42 1800 1202 600 626 800 1202 34
45 1900 1269 700 730 800 1202 36
48 2100 1403 700 730 900 1352 39
54 2300 1535 800 834 1000 1502 42
60 2600 1737 900 939 1100 1652 48
72 3100 2071 1000 1043 1300 1953 58
75 3200 2138 1100 1147 1300 1953 60
78 3300 2204 1100 1147 1400 2103 62
90 3800 2538 1300 1356 1600 2403 72
105 4400 2939 1500 1565 1800 2704 83
Diameter Beam
60' and Under W8 x 67
72' through 75' W10 x 77
78' through 105' W10 x 88