Typical Concrete Slab Construction Joint (pdf)


When you have large slab areas it is wise to use a construction joint.

The keyed joint prevents the slabs from rising or lowering. You may have experienced two concrete slabs that stick up or down from the adjacent slab. This is a tripping hazard.

You can use dowels and other methods to keep two slabs together; this generally is when you abut to an existing slab and there is not a key.

In a residential application a keyed joint is your best bet for new construction; if you are unsure you may email us to discuss.


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