Corner Break


A crack that intersects the PCC slab joints near the corner. “Near the corner” is typically defined as within about 2 m (6 ft) or so. A corner break extends through the entire slab and is caused by high corner stresses.

Figure 1: Corner break in Seattle, WA on a local road.

Figure 2: Corner break on a high volume road.


Roughness, moisture infiltration, severe corner breaks will fault, spall and disintegrate

Possible Causes

Severe corner stresses caused by load repetitions combined with a loss of support, poor load transfer across the joint, curling stresses and warping stresses.


Full-depth patch




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