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 Strong-Tie 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 for superior corrosion resistance, this holdown features a predeflected seat design that measurably reduces deflection under load, delivering exceptional overturning resistance and reliable performance in modern residential wood-framed structures.

Key Features

• Predeflected seat reduces deflection under load
• Angled fastening engages the screws in tension for higher load capacity, reducing the number of screws required
• Angled fastening tabs help drive the fastener at a 45 deg. angle, and offset holes on the second back plate block the fastener from being driven straight
• Overlapping back plate increases fastener strength and shear values, helping prevent post splitting
• Optimized screw patterns reduce splitting at the end of the post and maximize individual fastener capacity
• Extruded seat adds a greater cross-sectional steel section for added strength
• Teardrop holes allow higher and more even distribution of load
• Height: 14-11/16 in.
• Made from 14-gauge steel; hot-dip galvanization (HDG) offers extra corrosion resistance for exterior and treated-wood applications

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.