Manufactured of G-90 galvanized steel. Single top mount hanger engineered for I-joist to header applications. Offers full lateral support of the I-joist top chord, eliminating the need for web stiffeners in most applications. Features 1-1/2" top flange depth that accommodates all header types as well as back-to-back installations. Raised dimple nailing guides help assure correct 45 nailing into the I-joist bottom flange. The patented Seat Cleat that allows for quick, positive seating. The Seat Cleat will hold the I-joist in place, eliminating spring back during nailing in the bottom flange. TFL series features 1-1/2" top flange depth that accommodates all header types as well as back-to-back installations. 18-gauge.