CC8 Traffic Testing Plan
Gear Configuration
The NAPTF test vehicle consists of two carriages, a north carriage and a south carriage, each of which can be configured using up to 10 wheels. In the CC8 Phase 1 test, two gear configurations were used, a two-wheel (D) and four-wheel (2D). The dimensions of the load configuration are illustrated in the figure below. The dual spacing was 54 inches and the tandem spacing was 57 inches.
Wheel Load/Tire Pressure
The CC8 Phase 1 traffic test was conducted in a number of stages. The dates, test vehicle configurations, wheel loads, and loading passes for each stage of trafficking are summarized in the table below. The nominal tire inflation pressure for all load levels was 220 psi, although actual tire pressures during testing varied with traffic.
|
Dates
(all 2016)
|
Traffic Type
|
Wheel Load, lbs.
|
Wanders (North)
|
Wanders (South)
|
Cumulative Passes
|
|
22 Feb
|
Normal I
|
20,000
|
1
|
1
|
66
|
|
22 Feb
|
Overload I
|
21,500
|
0
|
1
|
132
|
|
Overload I
|
22,500
|
0
|
1
|
198
|
|
Overload I
|
23,000
|
0
|
1
|
264
|
|
Overload I
|
24,000
|
0
|
1
|
330
|
|
Overload I
|
25,000
|
0
|
1
|
396
|
|
23-24 Feb
|
Normal I
|
20,000
|
19
|
19
|
1650
|
|
25 Feb
|
Normal II
|
28,000
|
1
|
1
|
1716
|
|
25-26 Feb
|
Overload II
|
28,500
|
0
|
1
|
1782
|
|
Overload II
|
29,500
|
0
|
1
|
1848
|
|
Overload II
|
30,500
|
0
|
1
|
1914
|
|
Overload II
|
31,500
|
0
|
1
|
1980
|
|
Overload II
|
32,500
|
0
|
1
|
2046
|
|
26 Feb -
2 Mar
|
Normal II
|
28,000
|
36
|
36
|
4422
|
|
9-15 Mar
|
Normal II
|
28,000
|
33
|
0
|
6600
|
|
14-19 Sep
|
Normal II
|
28,000
|
28
|
0
|
8448
|
Wander Pattern
The pavement test vehicle simulates a normal distribution of aircraft traffic during traffic testing. The wander pattern used for the traffic testing consists of 66 vehicle passes, arranged in 9 wander positions. The below figure shows the CC8 Phase 1 wander positions. Offsets from the centerline are given in feet. Note that the offset dimension refers to the distance to the center of the load module, which is midway between the tires. This figure should be used in reference to the track numbers given in the database.
To download the entire wander table as used on the NAPTV, click here (CC8 Ph 1 Carriage Positions for 1 Full Wander.pdf)
Return to Construction Cycle 8 Phase 1 Overview