It is common for concrete driveways to have a depth or thickness of around 4 inches. Given a 4 inch depth, when making contraction joints, how deep should they be made?
Answer 1 Inch
When forming contraction joints in newly poured concrete, given a 4 inch thickness to the driveway, contraction joints should be given a depth of about 1 inch. A general rule of thumb for the depth of contraction joints is to make them 25% of the depth of the entire slab.
Asked by Jason Forbes · Last updated 5 years ago · 132 views · SOURCE
