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. Designed for I-joists, the THAI has extra long straps and can be field-formed to give height adjustability and top-flange hanger convenience. THAI Galvanized Adjustable Truss Hanger for 2-1/4 in. to 2-5/16 in. Engineered Wood (Pack of 25).