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Simpson Strong-Tie HDC10/4 Concentric Holdown

Brand: Simpson Strong-Tie Mfg#: HDC10/4-SDS2.5
Product#: 137HDC104
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The unique design of the HDC holdowns eliminate eccentricity. They install with Simpson Strong-Tie® Strong-Drive® SDS screws (included) to reduce slip and provide a greater net section area of the post compared to bolts.


  • Brand: Simpson Strong-Tie
  • Post/Joist Size: 4 X 4 in
  • Depth: 3 in
  • Material: Steel, Aluminum Base
  • Thickness: 10 ga
  • Minimum Embedment Depth: 2.5 in
  • Fastener Type: (24) SDS Screws
  • Finish: Galvanized
  • Fastener Size: 0.25 in Diameter X 2.5 in Length in
  • Load Capacity: 9665 lb Uplift Douglas Fir lb
  • Length: 14.125 in
  • Width: 3.5625 in