In counting settlement, a fault between two slabs is counted as one slab. A straightedge or level should be used to aid in measuring the difference in elevation between the two slabs.
Construction-induced elevation differential is not rated in PCI procedures. Where construction differential exists, it can often be identified by the way the high side of the joint was rolled down by finishers (usually within 6 in. (150 mm) of the joint) to meet the low-slab elevation.
|
Severity Level |
Difference in Elevation | |
|
Runways/Taxiways |
Aprons | |
|
L |
<1/4 in. (<6 mm) |
1/8 to ½ in. (3 to 13 mm) |
|
M |
¼ to ½ in. (6 to 13 mm) |
½ to 1 in. (13 to 25 mm) |
|
H |
>½ in. (13 mm) |
> 1 in. (25 mm) |