The Simpson Strong-Tie HDUE17-SDS4.5 HDUE 27-7/8 in. Galvanized Predeflected Holdown with Strong-Drive SDS Screws is an engineered holdown connector by Simpson Strong-Tie designed to deliver exceptional strength and reliability for securing shearwalls, braced wall panels, and other lateral-force-resisting applications in wood construction. Its predeflected seat design minimizes deflection under load, while the overlapping back plate and optimized screw patterns work together to provide superior overturning resistance in modern residential construction.

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: 27-7/8 in.
• Made from 10-gauge steel; galvanized (G90) for corrosion resistance

Specifications

• Model No.: HDUE17-SDS4.5
• Gauge: 10
• Width: 3 in.
• Height: 27-7/8 in.
• Coating/Finish: Zinc Galvanized, G90
• Seat Depth: 5-3/16 in.
• Centerline: 1-15/16 in.
• Screw Offset: 1-1/2 in.
• Country of Origin: United States
• Installation Hardware: Install with 1 in. anchor bolt and (28) 1/4 in. x 4-1/2 in. Strong-Drive SDS Heavy-Duty Connector screws (included)

Approved Applications

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

What's Included

Each pack contains (1) HDUE17-SDS4.5 Predeflected Holdown, (28) 1/4 in. x 4-1/2 in. Strong-Drive SDS Heavy-Duty Connector screws and (1) crescent washer.

Frequently Asked Questions

What is the purpose of the predeflected seat on the HDUE17-SDS4.5?

The predeflected seat is engineered to reduce deflection under load, helping the holdown maintain tighter tolerances and better performance in lateral-force-resisting applications compared to connectors without this feature.

Why does the HDUE17-SDS4.5 use angled fastening tabs?

The angled fastening tabs help drive the fastener at a 45 deg. angle, engaging the screws in tension for higher load capacity. Offset holes on the second back plate also block the fastener from being driven straight, ensuring optimal fastener positioning and reduced splitting risk.

What type of screws are required to install the HDUE17-SDS4.5, and are they included?

The HDUE17-SDS4.5 installs with 1/4 in. x 4-1/2 in. Strong-Drive SDS Heavy-Duty Connector screws along with a 1 in. anchor bolt. The (28) required SDS screws and a crescent washer are included with the holdown.

What material and corrosion protection does the HDUE17-SDS4.5 have?

The HDUE17-SDS4.5 is made from 10-gauge steel with a G90 zinc galvanized coating, providing a durable level of corrosion resistance suitable for residential wood construction applications.

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