Simpson screws for trusses and EWP
Simpson Strong-Tie's New Strong-Drive SDW Screws for multi-ply trusses and EWP (engineered-wood) assemblies install from one side, firmly cinching plies together while eliminating the need to flip heavy girders. The bold thread design of the SDW allows installers to fasten 2-, 3- and 4-ply trusses or 1 ¾" engineered lumber from one side, saving time.