UFC 3-270-04
15 March 2001
(300 millimeters) for every 0.1 inch (2.5 millimeters) of faulting. This is slightly rougher than
1/8 inch (3 millimeters) in 10 feet (3 meters).
Feathering distances necessary to meet straight-edge requirements of 1/8 inch (3 millimeters) in
10 feet (3 meters) are shown in Table 9.1.
Table 9.1. Feathering Distances
Fault Height
Feathering Distance
inches (millimeters)
feet (meters)
1/8 (3)
2.5 (0.76)
1/4 (6)
5.0 (1.52)
3/8 (10)
7.5 (2.29)
1/2 (13)
10.0 (3.04)
5/8 (16)
12.5 (3.81)
3/4 (19)
15.0 (4.57)
If the entire slab is to be ground, the depth of cut to remove the fault will be feathered out to the
next joint. Skid resistance can be improved by grinding and should only be done on those lanes
needing the treatment. The edges of the ground areas should be feathered into the adjoining
areas to eliminate a sharp drop off. The pavement should be ground in a longitudinal direction
that begins and ends at lines normal to the pavement centerline. The grinding operation should
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