For example, clay bricks may be used up to damp proof course level and concrete bricks above ... to expand and contract. Movement joints, also known as expansion, contraction or control joints, are ...

By creating straight-line weakened-planes in concrete, contraction joints “control” the cracking location by inducing cracks at predetermined locations. As slabs shrink due to cooling and ...

Existing control ... notes that joints need to be honored where the original joints are placed. If a contractor cuts new joints into the overlay but covers the old joints the concrete will still ...