I would use a large lag bolt and connect a 2x6 or 2x8 to the vertical concrete side putting a lag bolt every 12 to 16 inches. This will give you a good lege to hange some joist hangers from. Then...
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Depends where you are, we have ours in the front door.
It´s spelled Porsche, and they come from Germany, named after their designer Dr. Ferdinand Porsche. It is a reputed high performance vehicle.