- Urbana 2024 IDEA /
- Pavement Inspection /
- PCC Distress Measurement /
- Corner Break
Corner Break
A corner break is a crack that intersects the joints at a distance less than or equal to one-half the slab length on both sides, measured from the corner of the slab. For example, a slab measuring 11.5 by 20.0 ft (3.5 by 6.0 m) that has a crack 5 ft (1.5 m) from the joint on one side and 11.5 ft (3.5 m) on the other side is not considered a corner break; it is a diagonal crack. However, a crack that intersects 4 ft (0.5 m) from the joint on one side and 8 ft (2.5 m) on the other is considered a corner break. A corner break differs from a corner spall in that the crack extends vertically through the entire slab thickness, whereas a corner spall intersects the joint at an angle. Load repetition combined with loss of support and curling stresses usually cause corner breaks.
| Severity | Description |
|---|---|
| Low | Break is defined by a low-severity crack. A low-severity crack is less than 1/2 in (13 mm) wide, cracks of any width with satisfactory filler; no faulting. The area between the break and the joints is not cracked or may be lightly cracked. |
| Medium | Break is defined by a medium-severity crack, or the area between the break and the joints, or both, has a medium crack. A medium-severity crack is a nonfilled crack between ½ and 2 in (13 and 50 mm) wide, a nonfilled crack less than 2 in (50 mm) with faulting less than 3/8 in (10 mm), or a any filled crack with faulting less than 3/8 in (10 mm). |
| High | Break is defined by a high-severity crack, or the area between the break and the joints, or both, is highly cracked. A high severity crack is a nonfilled crack greater than 2 in (50 mm) wide, or any filled or nonfilled crack with faulting greater than 3/8 in (10 mm). |