ETL 1110-1-189
14 Feb 03
Tandem Wheel Gear Weight
One Layer System
Tire Pressure = 80 psi
70
70
65
65
54"
60
60
55
55
3a
a = Radius of Contact Area
50
50
45
45
Tandem Wheel Gear
40
40
43,750 lbs
37,500 lbs
35
35
24,000 lbs
17,500 lbs
30
30
8,000 lbs
25
25
20
20
15
15
10
10
5
5
Adapted From Steward et al. 1977
0
0
1
10
100
Subgrade Bearing Capacity, CNc, psi
Figure 7. Aggregate-surfaced pavement design curves for tandem-wheel gear loads.
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