Subsurface Stormwater Detention Systems


Acceptable Vehicle Loads

Information on allowable construction vehicles at various stages of system construction.

Maximum Allowable Axle Loads for Wheeled Vehicles at Various Cover Depths

Fill Depth
(in. over chamber)
Max. Axle Load
(lbs)
24+ without pavement 32,000
18 with pavement 32,000
12 16,000
6 8,000

Maximum Allowable Ground Pressures for Various Vehicle Track Widths and Fill Depths

Fill Depth
(in. over chamber)
Track Width Max.
(in.)
Ground Pressure
(PSF)*
6 18 900
24 800
30 760
36 720
12 18 1190
24 1010
30 910
36 840
18 18 1480
24 1220
30 1060
36 950

* Ground pressure is vehicle operating weight divided by total truck contact area for both tracks.

Allowable Tracked Vehicles

6 Inches 12 Inches 18 Inches
- CASE 550G LT
- New Holland DC 80
- John Deere 450H LGP
- Caterpillar D4C XL Series Hystat
- John Deere 550H LT
- Caterpillar D3C LGP Series III
- John Deere 550 H LGP
-- Caterpillar D4C LGP Series III
- CASE 850G LGP
- CASE 850G LGP
- John Deere 650H LGP
- Caterpillar D5C LGP Series III
- John Deere 770CC LGP
- John Deere 450H LT
- Caterpillar D3C Series III
- CASE 650G LT
- Caterpillar D4C Series III
- New Holland DC 80 LGP
- John Deere 550H LT
- Caterpillar D3C LGP Series III
- CASE 850 LT
- John Deere 550 H LGP
-- Caterpillar D4C LGP Series III
- Caterpillar D5C Series III
- CASE 850G LGP
- Caterpillar D5C LGP Series III
-- CASE 850 LT
- John Deere 550 H LGP
- Caterpillar D4C LGP Series III
- Caterpillar D4C LGP Series III Hystat
- John Deere 650H LT
- Caterpillar D5C Series III
- CASE 850G LGP
-- Caterpillar D5C XL Series III
- John Deere 650H LGP
-- Caterpillar D5C LGP Series III
- CASE 1150G 74" x 34" track
- John Deere 770CC LGP
- John Deere 850C
**Last Updated 11/27/01




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