![Rules for Designing Concrete Contraction Joints](https://img.forconstructionpros.com/files/base/acbm/fcp/image/2021/05/Untitled_design__3_.6095929623880.png?auto=format%2Ccompress&q=70&rect=81%2C48%2C1755%2C987&w=250)
Contraction joints are typically installed with jointing tools while the concrete is still plastic or by sawing after the concrete has been finished with either a wet-cut saw or more commonly, an early-entry dry-cut saw. Follow these guidelines for the layout, spacing, depths, and timing of the cutting of contraction joints on your concrete slab.