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HDU Holdown

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The HDU is designed for use in shearwalls and braced-wall panels, as well as other lateral applications in wood construction. The HDU uses Strong-Drive® SDS Heavy-Duty Connector screws which install easily, reduce fastener slip and provide a greater net section than bolts.

Key Features

  • Strong-Drive SDS Heavy-Duty Connector screws are supplied with the holdown to ensure proper fasteners are used
  • Predeflected seat eliminating deflection under load
  • No stud bolts to countersink at openings


  • See table


  • Galvanized


  • See General Notes for Holdowns and Tension Ties.
  • The HDU requires no additional washer.
  • Strong-Drive SDS Heavy-Duty Connector screws install best with a low-speed, high-torque drill equipped with a 3/8″ hex-head driver.
  • Fasteners and crescent washer are included with the holdowns. For replacements, order part no. SDS25212-HDU_. (Fill in the size needed, e.g., HDU2.)
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