Construction joints are formed or placed into slabs to define stopping places or the extent of an individual concrete placement. There are different types of construction joints: butt-type with ...

Sawed contraction joints are merely continuous sawed slots in tops of slabs that provide weakened or thinner sections of concrete so cracking occurs at these locations, as shown in Figure 2.

For instance, a 4-inch slab would traditionally be jointed every 12 feet, though many concrete contractors now multiply by 2.5 to get a joint spacing of 10 feet. Sparkman encourages farmers to ...