I am planning an addition to my garage building which sits on a slab. It’s easier to add space than to get rid of stuff. The question is, what provisions should be made to connect the new slab to the old slab. My potential contractor for the slab says nothing is needed, but I can imagine the joint shifting over time. Thoughts??
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Replies
none really is needed as long as the addition is on it own footing. Its only going to settle if the subsoil is uncompacted.
Normallyt, we pin the new to the opld, by drilling holes in the old footing and slab and use epoxy to inseert SSdowels or rebar
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On additions like this, I have had engineers spec. slick rod epoxied to the old slab and grease on the stub going in the new slab. This allows the new slab to slide on the dowel and still achieve the bridging affect needed to keep the two slabs even.
May not be needed on lighter residential additions, but larger commercial stuff around here seems to be using this a lot.
Dave