Joist hangers are designed to provide support underneath the joist, rafter or beam to provide a strong a connection. Simpson Strong-Tie offers a diverse line of hangers to handle almost any application with top flange, concealed flange and field-skewable and slopeable options. The MIU series hangers are designed for commercial and high-load I-joist applications without requiring web stiffeners. MIU Galvanized Face-Mount Joist Hanger for 1-3/4 in. x 16 in. Engineered Wood (Pack of 750).