The Simpson HDUE7-SDS3HDG HDUE 14-11/16 in. Hot-Dip Galvanized Predeflected Holdown with Strong-Drive SDS Screws is a heavy-duty holdown connector engineered by Simpson for securing shearwalls, braced wall panels, and other lateral-force-resisting applications in wood construction. Built from 14-gauge steel with a hot-dip galvanized finish, this holdown is designed for demanding residential wood-framing projects where reliable overturning resistance, reduced deflection, and long-term corrosion protection are essential requirements.

Key Features

• Predeflected seat - reduces deflection under load, helping maintain structural integrity and minimizing movement at the holdown connection over time.
• Angled fastening tabs - guide each screw at a 45 deg. angle to engage fasteners in tension rather than shear, delivering higher individual load capacity and reducing the total number of screws required.
• Offset holes on the second back plate - physically block fasteners from being driven straight, ensuring every screw is properly angled for optimal tension engagement every time.
• Overlapping back plate - increases fastener strength and shear values while helping prevent post splitting, adding a critical layer of structural reinforcement at the connection point.
• Optimized screw patterns - reduce splitting at the end of the post and maximize individual fastener capacity, protecting the wood member and the connection simultaneously.
• Extruded seat - adds a greater cross-sectional steel section for added strength at the base of the holdown where loads are highest.
• Teardrop holes - allow higher and more even distribution of load across the connector, reducing stress concentrations and improving overall performance.
• Hot-dip galvanized finish on 14-gauge steel - provides extra corrosion resistance suited for exterior installations and applications involving treated wood where standard coatings may be insufficient.

Why This Product

• Built-in deflection control - the predeflected seat design directly addresses one of the most common performance concerns in holdown applications, reducing movement under load without requiring additional field adjustments or shimming.
• Fewer fasteners without sacrificing strength - the angled fastening system engages screws in tension for higher load capacity per fastener, so the connection achieves strong performance with a more efficient installation process.
• Ready to install out of the box - each unit ships with 13 Strong-Drive SDS Heavy-Duty Connector screws and a crescent washer included, eliminating a separate fastener order and keeping the job moving.
• Engineered for treated-wood and exterior environments - hot-dip galvanization offers a higher level of corrosion protection than standard zinc plating, making this holdown a dependable choice for applications where moisture exposure or treated lumber chemistry would degrade lesser coatings.

Specifications

• Model Number: HDUE7-SDS3HDG
• Height: 14-11/16 in.
• Width: 2-7/8 in.
• Gauge: 14
• Coating/Finish: Hot-Dip Galvanized
• Installation Fasteners: 5/8 in. anchor bolt and (13) 1/4 in. x 3 in. Strong-Drive SDS Heavy-Duty Connector screws (included)
• 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 connections in wood construction
• Braced wall panel connections
• Lateral-force-resisting applications in wood construction
• Exterior applications requiring enhanced corrosion resistance
• Treated-wood applications requiring hot-dip galvanized protection

What's Included

Each pack contains (1) HDUE7-SDS3HDG Hot-Dip Galv. Predeflected Holdown, (13) 1/4 in. x 3 in. Strong-Drive SDS Heavy-Duty Connector screws and (1) crescent washer.

Frequently Asked Questions

What fasteners are required to install the HDUE7-SDS3HDG holdown?

Installation requires a 5/8 in. anchor bolt and (13) 1/4 in. x 3 in. Strong-Drive SDS Heavy-Duty Connector screws. The SDS screws are included with the holdown, along with a crescent washer.

Why does the HDUE7-SDS3HDG use angled fastening tabs instead of straight-driven screws?

The angled fastening tabs are engineered to help drive each fastener at a 45 deg. angle, which engages the screws in tension rather than shear. Offset holes on the second back plate prevent the fastener from being driven straight, ensuring proper engagement. This angled fastening method delivers higher individual fastener load capacity, allowing fewer total screws to achieve the required connection strength.

What makes the hot-dip galvanized finish on this holdown important?

The hot-dip galvanization (HDG) process provides extra corrosion resistance compared to standard finishes, making the HDUE7-SDS3HDG suitable for exterior applications and installations involving treated wood, where exposure to moisture and preservative chemicals can degrade lesser coatings over time.

How does the predeflected seat on the HDUE7-SDS3HDG benefit the connection?

The predeflected seat is designed to counteract deflection that occurs when the holdown is placed under load. By compensating for this movement in advance, the predeflected seat helps maintain tighter, more consistent connections in shearwall and lateral-force-resisting assemblies, improving overall structural performance.

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