Quote:
Originally Posted by javadog
I would just pour a rectangle, not an H shape. I would put #4 rebar in it on 12 inch centers, both ways, top and bottom. I would dowel the top mat into the existing slab with #4 bar on all four sides. I'd make the bottom level. I'd pour 4000HE and make sure the slump wasn't too high, nor would I allow water to be added to the load. I'd make sure it was vibrated into place. I'd make jigs and embed proper anchor bolts into the pour for the lift bases.
JR
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I would only embed anchor bolts if I knew they were proper. J bolts will not hold in that situation. But this would be my plan A.