I am a structural engineer on a project where we are putting 8" cmu walls (approximately 12' high) on top of an existing 4" slab. I'm not overly concerned with the bearing of the cmu on the slab (if the slab cracks it's acceptable), however even if i tie the wall at the roof, does anyone have any recommendations for the interface between the cmu and existing slab? Would you dowel into the existing 4" slab with 3" of embedment? I'm not sure exactly what this would achieve.
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