Structure Tech - Double fail; wrong joist hanger used, and wrong fasteners. The joist is supposed to "hang" from that metal bracket, not be suspended by a few fasteners. Also, the fasteners
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Simpson Strong-Tie ITS Galvanized Top-Flange Joist Hanger for 2-1/2 in. x 9-1/2 in. Engineered Wood ITS2.56/9.5 - The Home Depot
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