Key Features
High-Load Holdown The Simpson Strong-Tie STHD14 Strap Tie Holdown is built for shearwall anchorage where higher uplift and overturning forces matter. It gives you an embedded strap-style connection that stays secure in concrete and transfers load into the wall framing. Stable Before Pour The shaped embed section is designed to improve stability before and during the concrete pour. That helps prevent the strap from shifting parallel or perpendicular while the foundation is being placed. Built for Concrete Slots below the embedment line increase front-to-back concrete bond and help reduce spalling. That matters on real installs because it supports better concrete engagement around the embedded portion.
Overview
The Simpson Strong-Tie STHD14 Strap Tie Holdown is an embedded strap-style holdown for concrete foundations and cold-formed steel or shearwall anchorage applications. This is a strap tie holdown designed for transferring uplift and overturning loads from the wall into concrete. Model Number: STHD14. If you are tying a wall system down to a concrete foundation and need a cast-in-place connector with more load capacity than a basic strap, this is the kind of hardware you spec.
What makes the STHD series different is the way it is shaped for the pour. Simpson calls out enhanced stability before and during concrete placement, which matters because movement during the pour can throw off alignment and create headaches when the wall goes up. The fastener pattern is also laid out to allow fastening at the edges of back-to-back studs, which is useful in wall assemblies where fastening space is tight and connector placement is not forgiving.
The STHD14 is made from 12-gauge steel with a zinc galvanized G90 finish. In practical terms, that gives you a formed steel connector with the stiffness needed for structural anchorage and the corrosion protection expected for standard galvanized framing hardware. The strap is 3 inches wide and 26-1/8 inches long, so it gives you a substantial fastening area along the stud line while keeping the connector format straightforward for layout and inspection.
Below the embedment line, the connector uses slots that help increase front-to-back concrete bond and help reduce spalling. That is not just a shape detail. It affects how the connector behaves once the concrete cures, especially in real foundation work where edge conditions, corner conditions, and pour quality all affect the finished result. Simpson also notes that STHD10 and STHD14 can achieve full loads for spalls less than 4 inches in the installation conditions they describe, which is useful jobsite context when evaluating minor concrete damage near the strap.
For installation, Simpson specifies using all required fasteners, installing the strap plumb, and fastening the strap from the bottom up. The connector is intended to be installed before the concrete pour, typically with a StrapMate or similar holding device to keep it positioned. That makes this a product for planned foundation work, not a last-minute retrofit part. If your workflow depends on predictable placement before the pour, that is exactly where this connector fits.
The STHD14 is specifically meant for concrete applications. It is not part of a battery platform or tool system, but it is part of Simpson Strong-Tie’s structural connector lineup for holdowns and tension ties. That matters if you are working from engineered details or matching other Simpson connection hardware across the job, because the naming, sizing, and load-table structure stay consistent within the system.
Who should buy it? This is for engineers, framers, foundation crews, and contractors building shearwalls or other structural wall assemblies that call for an embedded strap tie holdown. It is also a strong fit for code-driven residential and light commercial construction where the hardware schedule is already calling out Simpson holdown models by part number. If your plans specify STHD14, this is the exact connector category you want, and the size, gauge, finish, and concrete-use design are what make it job-correct.
Keeps the Strap Positioned During the Pour
This connector is meant to be set before the pour, and the design is aimed at staying where you put it. That saves rework later when you are trying to line up the wall, fasteners, and foundation connection.
- Install before concrete pour with a StrapMate or similar holding device
- Simpson calls out improved stability to help resist parallel and perpendicular movement during placement
Designed to Bond Better in Concrete
The embed section is shaped for more than just anchorage. The slots below the embedment line help improve front-to-back concrete bond and are intended to help reduce spalling, which matters at corners and edge conditions.
- Slots below embedment line help the concrete engage the strap better
- Useful detail for foundation work where concrete damage around embedded hardware can become an issue
Made for Structural Wall Tie-Down Work
This is not general-purpose hardware. It is a structural concrete holdown for planned wall anchorage, where embedment, wall location, and fastener count all matter to the final load path.
- Application: concrete foundations
- Used in holdown and tension tie situations for shearwall-style construction
Key Specifications
| Model | STHD14 |
|---|---|
| Material Gauge | 12 gauge steel |
| Finish | Zinc Galvanized, G90 |
| Width | 3 in. |
| Overall Length | 26-1/8 in. |
| Minimum Embedment | 14 in. |
| Application | Concrete |
| Packaging Quantity | 1 |
Compatibility
Base Material Designed for cast-in-place concrete foundation applications. Wall Assembly Fastener pattern allows fastening to the edges of back-to-back studs. Installation Method Installed before the concrete pour and commonly held in place with a StrapMate or similar device.
Built For
Construction General Contracting Framing Foundation Work Shearwall Anchoring Cold-Formed Steel Construction Residential Structural Work Light Commercial Structural Work
Pro Tip
Set the STHD14 before the pour, keep the strap plumb, and fasten it from the bottom up. That keeps alignment cleaner and helps avoid fighting the connector when the wall is already standing.
Tool Nut’s Take
Tool Nut’s Take
Simpson Strong-Tie STHD14 Strap Tie Holdown for Real Structural Tie-Down Work
The Simpson Strong-Tie STHD14 Strap Tie Holdown is the kind of connector you buy when the plans call for a serious cast-in-place holdown and you do not want to gamble on a lighter-duty strap.
- Who it’s for: Contractors, framers, and engineers working on shearwalls, foundation tie-downs, and other structural wall-to-concrete connections.
- Why it stands out: The embedded design is made to stay stable during the pour, and the slot pattern below the embedment line is there for a reason, better concrete bond and less concern about spalling around the connector.
- Worth knowing: This is a planned-install product, not a retrofit fix. You need to place it before the pour and follow the required fastener schedule and installation details.
Common Questions
- What kind of product is the STHD14? It is an embedded strap-style holdown used to tie a structural wall assembly into concrete.
- What material and finish does it use? The STHD14 is made from 12-gauge steel with a zinc galvanized G90 finish.
- How large is the connector? The strap is 3 inches wide and 26-1/8 inches long.
- Is it installed after the concrete cures? No. Simpson specifies installing it before the concrete pour and keeping the strap plumb during placement.
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