15 1 8" Simpson HHDQ11SS SDS2.5 Heavy Holdown Quick Install W SDS Screws Stainless Steel MIT HIT I Joist & SCL Hangers The Simpson Strong Tie HPA Heavy The Simpson Strong Tie HPA Heavy Purlin Anchor is designed to secure wood roof purlins or trusses to concrete or masonry walls Simpson Strong Tie SA36 Strap Connector is a versatile framing connector designed to reinforce wood to wood connections in a variety of structural applications The Simpson Strong Tie HHDQ Holdown is a heavy duty structural holdown designed to anchor wood shearwalls and posts to concrete foundations helping protect structures in high wind and high seismic regions