The Simpson Strong-Tie HHDQ Holdown is a heavy-duty structural holdown designed to anchor wood shearwalls and posts to concrete foundations. It transfers extreme uplift and overturning forces from wood framing into the foundation, helping protect structures in high-wind and high-seismic regions.

Built for maximum uplift resistance, the HHDQ series delivers higher load capacity than standard holdowns while maintaining a practical installation footprint. The included SDS structural screws provide a strong, code-compliant attachment to wood studs or post assemblies, streamlining field installation.

Featuring a compact heavy design, this structural connector provides high-strength performance without significantly increasing wall width.

Key Features:

• Maximum Load Capacity: Engineered for high-demand uplift and overturning forces.
• SDS Screws Included: Pre-engineered structural screws provide fast, reliable installation.
• Compact Profile: Delivers heavy-duty performance in a space-efficient design.
• Shearwall Anchorage: Secures wall ends and vertical framing members to foundations.
• Finish Options: Available in corrosion-resistant finishes for interior or exterior use.