Simpson H3SS Stainless Steel Hurricane Tie (Left & Right) PACK:100 Pk Why are SDS screws used

Why are SDS screws used instead of bolts on this holdown

while maintaining the flexibility needed to accommodate seasonal contraction and expansion

This rod conforms to UNC Class 2A or 1A thread specifications

or footings

Simpson H3SS Stainless Steel Hurricane Tie (Left & Right) PACK:100 Pk Why are SDS screws usedThe Simpson Strong Tie H3SS H3 18 Gauge Stainless Steel Hurricane Tie is a single sided hurricane tie engineered to resist moderate loads at the rafter truss to top plate connection. As part of a continuous load path, the H3SS resists both lateral and uplift loads, providing a reliable structural connection that helps guard against wind and seismic forces. Available in left and right hand models, these ties can be installed in pairs to deliver