The Simpson HDUE3-SDS3 8-11/16 in. Galvanized Predeflected Holdown is a heavy-duty connector from Simpson engineered to deliver exceptional overturning resistance in shearwall connections, braced wall panel anchorage, and other lateral-force-resisting applications in wood construction. Built from 14-gauge steel with a Zinc Galvanized (G90) finish, this holdown combines a predeflected seat design with an overlapping back plate and optimized fastener geometry to maximize load capacity while protecting the integrity of the wood post. Each unit ships complete with seven 1/4 in. x 3 in. Strong-Drive SDS Heavy-Duty Connector screws and a crescent washer, so installation can begin without sourcing additional fasteners.

Key Features

• Predeflected seat - reduces deflection under load, helping the connector maintain tighter tolerances in lateral-force-resisting systems compared to standard non-predeflected designs.
• Overlapping back plate - increases fastener strength and shear values, helping prevent post splitting and improving overall structural reliability.
• Optimized screw patterns - reduce splitting at the end of the post and maximize individual fastener capacity, protecting the wood post's net section throughout its service life.
• Extruded seat - adds a greater cross-sectional steel section for added strength, providing a more robust bearing surface under uplift loads.
• Teardrop holes - allow higher and more even distribution of load across the connector, contributing to consistent performance under lateral and uplift forces.
• 14-gauge steel construction - delivers the structural rigidity needed for demanding shearwall and braced wall panel applications.
• Zinc Galvanized (G90) coating - provides corrosion resistance for lasting durability in typical residential construction environments.
• Installs with included Strong-Drive SDS screws - the seven included 1/4 in. x 3 in. Strong-Drive SDS Heavy-Duty Connector screws minimize fastener slip and streamline installation alongside a 5/8 in. anchor bolt.

Why This Product

• Engineered to minimize deflection - the predeflected seat design specifically addresses one of the most common performance limitations in holdown connectors, helping shearwall systems stay tighter and more effective under real-world lateral loads.
• Post protection built into the design - the combination of an overlapping back plate and optimized screw patterns actively works to prevent post splitting, preserving the structural member that the holdown depends on.
• Complete installation kit included - arriving with the Strong-Drive SDS screws and crescent washer already in the package means fewer trips to the supply house and a faster, more predictable installation process on the jobsite.
• Purpose-built for residential lateral-force-resisting systems - from shearwall holdown connections to braced wall panel anchorage, every design feature of this connector is optimized for the specific demands of modern wood-frame construction.

Specifications

• Model Number: HDUE3-SDS3
• Height: 8-11/16 in.
• Width: 2-7/8 in.
• Gauge: 14
• Coating/Finish: Zinc Galvanized, G90
• Seat Depth: 3-3/8 in.
• Centerline: 1-3/8 in.
• Screw Offset: 1-1/2 in.
• Country of Origin: United States

Approved Applications

• Shearwall holdown connections in wood construction
• Braced wall panel anchorage
• Lateral-force-resisting applications in residential wood structures

What's Included

Each pack contains (1) HDUE3-SDS3 Galvanized Predeflected Holdown, (7) 1/4 in. x 3 in. Strong-Drive SDS Heavy-Duty Connector screws and (1) crescent washer.

Frequently Asked Questions

What fasteners are used to install the HDUE3-SDS3?

The HDUE3-SDS3 installs with a 5/8 in. anchor bolt and (7) 1/4 in. x 3 in. Strong-Drive SDS Heavy-Duty Connector screws, which are included with the holdown. Using SDS screws minimizes fastener slip and helps preserve the wood post's net section.

What is the purpose of the predeflected seat on this holdown?

The predeflected seat is specifically engineered to reduce deflection under load, helping the holdown maintain tighter tolerances and better performance in lateral-force-resisting applications compared to standard non-predeflected designs.

What material and coating is used on the HDUE3-SDS3?

The HDUE3-SDS3 is made from 14-gauge steel and features a Zinc Galvanized (G90) coating, which provides corrosion resistance for added durability in typical residential construction environments.

How do the teardrop holes benefit the HDUE3-SDS3's performance?

The teardrop holes are designed to allow higher and more even distribution of load across the holdown, contributing to the connector's overall strength and structural efficiency.

Note: Product dimensions and/or screw or bolt holes may differ from picture.