Criteria for Replacement
A deficient sidewalk generally contains one or more of the following six replacement criteria:
- Crack - Any separation of the sidewalk other than at the planned joints. Any crack ¼” wide or more requires repair.
- Trip Hazard - Vertical movement of the sidewalk either at a joint or a crack. Movement more than ¼” high requires repair.
- Spalling - Characterized by the smooth surface breaking off, exposing the rocks in the concrete. Generally, pit depths of ¼” or more require repair.
- Settlement - Sidewalk that's either settled to a slope greater than ¼” per foot or holds water will require repair. Settlement is commonly found over utility trenches.
- Heaving - Sidewalk heaving having resulted in a slope greater than ¼” per foot requires repair. This is commonly caused by tree roots.
- Missing - Sidewalk sections are missing, usually due to utility work or being badly broken up.