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What's the load here? You wouldn't normally spread the weight of a floor on to hangers that are attached to masonary. The bolts/single brick become the weak point (shear strength risk). You'd normally use a masonry hanger that was folded on top of the masonry itself so the load could be spread effectively, or you'd knock into the wall directly and use longer joists.
Or is this just to support something casual?
It begins