Product Description
The Simpson S/HDU 16 5/8" Holdown for Steel, Light Gauge is a Simpson Strong-Tie engineered connector purpose-built for cold-formed steel framing systems. Designed to anchor shearwalls to the foundation and resist overturning forces, this holdown delivers reliable structural performance across demanding applications including high-wind construction, seismic new construction, and light gauge steel shearwall assemblies. The S/HDU series combines structural integrity with jobsite efficiency - pre-deflected geometry virtually eliminates material stretch, keeping deflection under load to a minimum, while self-drilling tapping screw installation reduces time on the job and cuts labor costs.
Key Features
- Designed for cold-formed steel framing - engineered specifically for CFS systems, ensuring a reliable, code-appropriate fit in light gauge steel construction without modification or guesswork.
- Anchors the shearwall to the foundation to resist overturning - provides a critical structural connection that keeps shearwall assemblies stable under lateral loads from wind or seismic events.
- Pre-deflected geometry - virtually eliminates material stretch so the connector maintains low deflection under load, a key performance advantage in high-demand structural applications.
- Made from 118 mil (10 ga.) steel - heavy-gauge construction delivers the load capacity and durability required for demanding cold-formed steel holdown applications.
- Zinc Galvanized, G90 finish - provides corrosion resistance suited to the environments where cold-formed steel framing is commonly installed, helping protect the connector over the long term.
- Installs with self-drilling tapping screws - screw-based attachment to the stud simplifies installation compared to welded or bolted alternatives, reducing labor time and overall project cost.
Why This Product
- Built for the toughest lateral load conditions - approved for high-wind construction and seismic new construction applications, this holdown is a dependable choice when structural performance cannot be compromised.
- Low deflection by design - the pre-deflected geometry is not a field adjustment but an engineered-in feature that actively minimizes material stretch and keeps movement under load tightly controlled, critical for shearwall system integrity.
- Faster installation, lower labor cost - attachment using self-drilling screws into the stud means no special tooling or welding, speeding up the installation process and making it a practical choice for production CFS framing crews.
- Trusted Simpson Strong-Tie engineering - part of a comprehensive line of cold-formed steel connectors from Simpson Strong-Tie, this holdown is designed to deliver the strength and performance expected across a wide range of light gauge steel project types, from residential shearwalls to commercial framing.
Specifications
- Model Number: S/HDU11
- Height: 16-5/8 in.
- Thickness: 118 mil
- Gauge: 10 ga.
- Coating: Zinc Galvanized, G90
- Finish: Zinc Galvanized, G90
- Country of Origin: United States
Approved Applications
- High-Wind Construction
Install With
- Install with (27) #14 self-drilling screws to the stud and (1) 7/8 in. diameter anchor bolt to structure
Frequently Asked Questions
What type of framing is the Simpson S/HDU11 holdown designed for?
The S/HDU11 is specifically designed for use with cold-formed steel (CFS) framing systems, making it suitable for a wide range of light gauge steel construction projects.
What fasteners are required to install the S/HDU11?
Installation requires (27) #14 self-drilling screws to attach the holdown to the stud, along with (1) 7/8 in. diameter anchor bolt to connect it to the structure.
How does the S/HDU11 help reduce deflection under load?
The S/HDU11 features pre-deflected geometry that virtually eliminates material stretch, resulting in low deflection under load - a critical performance advantage in shearwall applications.
What corrosion protection does the S/HDU11 provide?
The S/HDU11 is finished with a Zinc Galvanized, G90 coating, which provides corrosion resistance suitable for cold-formed steel framing environments.
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