Use caution when using both crack control options in the same slab. If too much reinforcement passes through contraction joints, joints become too stiff and may not crack and open as designed.

Continuous reinforcement through joints can restrict joints from opening freely. Figure 1. Types of Construction Joints Butt-type construction joints are basically free slab edges that deflect ...

Check out the finished version on the right after the shelter has been slid into place and bolted to the concrete slab. The Reddit ... you could be trapped if the opening is blocked by debris.