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 IUS series is a hybrid hanger that incorporates the advantages of the face-mount and top-mount hanger and is fully compatible with shallow-flange I-joists. IUS Galvanized Face-Mount Joist Hanger for 2-5/16 in. x 14 in. Engineered Wood (Pack of 750).