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Simpson Strong-Tie HDQ8 Holdown

Brand: Simpson Strong-Tie Mfg#: HDQ8-SDS3
Product#: 137HDQ8SDS3
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The unique seat design of the HDQ8 greatly minimizes deflection under load. Install easily, reduce fastener slip and provide a greater net section area of the post when compared to bolts. It may be installed either flush or raised off the mudsill without a reduction in load value.


  • Brand: Simpson Strong-Tie
  • Depth: 2.5 in
  • Minimum Embedment Depth: 2.375 in
  • Material: Steel
  • Finish: Galvanized
  • Load Capacity: 5715 lb Uplift Douglas Fir lb
  • Fastener Size: 0.25 X 3 in in
  • Post/Joist Size: 3.5 in Width
  • Fastener Type: (20) SDS Screws
  • Thickness: 7 ga
  • Length: 14 in
  • Width: 2.875 in