Simpson 31" 18 Gauge Light Tension Tie, Galvanized LTTI31Model No. LTTI31 Gauge. 18 Width (in.) 3 3 4 Length (in.) 31 The LTT is a solution for resisting tension loads when used to attach wood to concrete or masonry walls. This light tension tie is designed for horizontal purlin applications and may also be used for vertical holdown applications. For LTT tension tie applications with unreinforced concrete masonry, 3 4" post installed anchor bolts are commonly used. Key Features Nailing patterns to