TM 5-850-1
Table B-2. CBR and Thickness Requirements for 200 and 10,000 Passes of Container Handling Vehicles
Operating on Unsurfaced Soils with Subgrade Strengths of 4 and 10 CBR a
Passes
200
10,000
Tire
Thickness
Thickness
Gross
Contact
Requirements, in
Requirements, in.
W eight
Payload
Tire Pressure, psi
Area
Surface
4-CBR
10-CBR
Surface
4-CBR
10-CBR
2
Vehicle
lb
lb
Inflation
Contact
in.
CBR
Subgrade
Subgrade
CBR
Subgrade
Subgrade
Amphibian
b
LARC LX
319,000
120,000
42
42
1898
10
22
0
20
35
16
Straddle Carriers
Shoremaster
129,200
67,200
100
105
154
9
11
0
17
18
10
Clark 512
164,500
67,200
132
133
210
14
14
9
26
20
12
Belotti B67b
159,800
67,200
125
115
380
14
17
9
27
28
14
Front-Loading Forklift
C
Hyster H620B
140,710
62,000
100
145
224
20
19
11
38
35
20
LeTro-Porter 2582
165,200
67,200
70
99
800
18
21
12
35
35
20
Side-Loading Forklift
Lancer 3500
213,200
67,200
149
150
183
19
20
11
36
35
20
Yard Gantry
Travelift CH 1150
223,200
67,200
146
146
280
24
22
12
45
36
21
Mobile Cranes
d
P&H 6250-TC
396,021
o
100
106
260
16
31
18
30
55
31
d
LeTro Crane GC-500
708,504
o
35
69
1275
26
32
17
50
56
29
Tractor-Trailer Combination
M52 Tractor and Trailer
100,000
67,200
80
68
82.5
5
10
0
10
18
0
a
Unsurfaced soil criteria limited to approximately 10,000 passes.
b
As is well known, the LARC LX was not specifically designed for container handling. It has been included in this study for comparative purposes because of
its known operational capability on relatively low-strength soils.
c
Maximum payload for the Hyster H620B.
d
Zero payload while moving.
e
Criteria do not exist for loads imposed by vehicles on unsurfaced soils. Data shown are based on extrapolation and engineering Judgment.
by U.S. Army Engineer
Waterways Experiment Station
B-5
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