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. LB top-flange hangers are suitable for joist, beam or purlin use. LB Galvanized Top-Flange Joist Hanger for 2×8 (Pack of 1500).