Product Description
Simpson HDU4-SDS2.5 HDU 10-15/16 in. Galvanized Predeflected Holdown with Strong-Drive SDS Screws is engineered by Simpson Strong-Tie to deliver superior performance in shearwalls, braced-wall panels, and other lateral applications in wood construction. The predeflected body virtually eliminates deflection under load due to material stretch, while the included Strong-Drive SDS Heavy-Duty Connector screws make installation faster and more reliable than traditional bolt-based systems.
Key Features
- Predeflected body virtually eliminates deflection due to material stretch
- Uses SDS screws, which install easily, reduce fastener slip and provide a greater net section area of the post compared to bolts
- SDS screws are supplied with the holdowns to ensure proper fasteners are used
- No stud bolts to countersink at openings
- Height: 10-15/16 in.
- Made from 14-gauge steel
- Galvanized (G90) for extra corrosion resistance
Specifications
- MPN: HDU4-SDS2.5
- Height: 10-15/16 in.
- Gauge: 14
- Coating: Zinc Galvanized, G90
- Finish: Zinc Galvanized, G90
- Install With: Install with 5/8 in. anchor bolt and 1/4 in. x 2-1/2 in. Strong-Drive SDS Heavy-Duty Connector screws (included)
- Country of Origin: United States
What's Included
Each pack contains (1) HDU4-SDS2.5 Predeflected Holdown, (10) 1/4 in. x 2-1/2 in. Strong-Drive SDS Heavy-Duty Connector screws and (1) crescent washer.
Downloads and Resources
Frequently Asked Questions
- What does "predeflected" mean and why does it matter?
- The HDU4-SDS2.5 holdown body is pre-deflected during the manufacturing process. This virtually eliminates deflection under load due to material stretch, resulting in a more rigid, stable connection compared to standard holdowns that can shift or compress once load is applied.
- Why are SDS screws used instead of bolts in this holdown?
- Strong-Drive SDS Heavy-Duty Connector screws install easily, reduce fastener slip, and provide a greater net section area of the post compared to bolts. They also eliminate the need to countersink stud bolts at openings, simplifying the installation process.
- What fasteners are required to install the HDU4-SDS2.5?
- Installation requires a 5/8 in. anchor bolt and 1/4 in. x 2-1/2 in. Strong-Drive SDS Heavy-Duty Connector screws. The SDS screws are included with the holdown to ensure the correct fasteners are always used.
- What material and corrosion protection does this holdown have?
- The HDU4-SDS2.5 is made from 14-gauge steel with a Zinc Galvanized G90 coating and finish, providing extra corrosion resistance for long-term durability in demanding construction environments.
Note: Product dimensions and/or screw or bolt holes may differ from picture. Please see item description for specifications.
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