Grain Systems Bin Accessories PNEG-318 - Manual (Page 153)

19. Commercial Tank Foundation Tunnels
PNEG-318 Concrete Foundation Recommendations for GSI Grain Bins 153
80' Maximum Sidewall Height (30 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 - 80' 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 4000 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
33 1500 1002 500 522 700 1051 27
36 1600 1069 600 626 700 1051 30
39 1700 1136 600 626 800 1202 32
42 1900 1269 700 730 800 1202 34
45 2000 1335 700 730 900 1352 36
48 2100 1403 800 834 900 1352 39
54 2400 1602 900 939 1100 1652 43
60 2600 1737 900 939 1200 1802 48
72 3100 2071 1100 1147 1400 2103 58
75 3300 2204 1200 1252 1500 2253 60
78 3400 2271 1200 1252 1500 2253 62
90 3900 2605 1400 1460 1800 2704 72
105 4600 3073 1600 1669 2000 3004 83
Diameter Beam
36' and Under W10 x 77
42' through 78' W10 x 88
90' through 105' W10 x 100