Simpson Holdowns & Tension Ties

Simpson Purlin Anchors

Simpson Strong-Tie purlin anchors are designed to secure horizontal roof framing members and transfer their loads into concrete or masonry structural systems. By creating a reliable connection between framing and foundation materials, these anchors play a vital role in maintaining the strength, performance, and safety of roofing structures. Their steel construction and galvanized finishes ensure durability, corrosion resistance, and code compliance, making them a trusted solution for both residential and commercial applications.

With a streamlined profile and engineered nailing patterns, purlin anchors are built for both strength and ease of installation. They provide flexibility for use in a variety of structural layouts, from wood-to-concrete to wood-to-masonry connections. Properly installed, they help ensure stability, reduce potential shifting under load, and extend the life of a roofing system by reinforcing critical connection points. Whether for new construction or retrofit projects, purlin anchors deliver dependable performance where it matters most.

Why Buy Simpson Strong-Tie Holdowns & Tension Ties?

When it comes to structural connections, every detail matters. Simpson Strong-Tie holdowns and tension ties are engineered for reliability, consistency, and code compliance, giving builders peace of mind that their framing can handle demanding loads. Whether you’re securing shearwalls, braced panels, or deck assemblies, these connectors provide proven strength with smart features like pre-deflected designs, staggered nail patterns, and durable galvanized finishes. Choosing Simpson means investing in products trusted by professionals nationwide to keep jobsites safer, build stronger, and projects up to code.

Face Mount Girder Tiedown (Model FGTR)

The FGTR is engineered for high-load girder connections in both new builds and retrofit masonry applications. Its face-mount design makes installation straightforward, while its non-pitch-specific configuration ensures versatility. For added strength, multiple units can be installed in pairs, delivering high uplift capacity where it’s needed most.

Bolted Holdowns (Models HD, HDB)

HD and HDB holdowns provide reliable low-deflection performance, making them a go-to choice for demanding structural requirements. These bolted holdowns accommodate a range of load capacities, giving contractors dependable options for resisting uplift and lateral forces in shearwall assemblies.

Screw-Installed Holdowns (Models HDU, HDUE, HDQ, HHDQ)

Pre-deflected during the manufacturing process, these models are designed to reduce deflection under load. They install with Simpson Strong-Drive® SDS heavy-duty screws, eliminating the need for bolts while delivering exceptional strength. Ideal for shearwalls and other high-load applications, these holdowns are both efficient and reliable.

Purlin Anchors (Model PA)

Constructed from 12-gauge galvanized steel, PA purlin anchors provide a robust connection between wood framing and concrete or concrete block. Their durability and corrosion resistance make them an excellent choice for structural applications where long-term performance is essential.

Strap-Tie Holdowns (Models LSTHD, STHD)

Strap-tie holdowns feature a staggered nail pattern designed to reduce splitting while achieving high load ratings. Engineered with installation efficiency in mind, these connectors support both prescriptive and engineered designs, delivering strength and reliability in shearwall and deck applications.

Tension Bridging (Model TB)

TB tension bridging is a cost-effective solution for stabilizing floor systems. Installed between joists, it helps distribute loads and reduce bounce or deflection, improving overall floor performance. Its flexible nailing options make it adaptable to a variety of framing layouts.

Tension Ties (Models LTT, HTT)

Designed to resist heavy tension loads, these ties feature an optimized nailing pattern for maximum holding power. With a galvanized finish for durability, LTT and HTT ties are commonly used in both deck and wall assemblies, providing contractors with a reliable solution for long-term structural stability.

Frequently Asked Questions

Where are tension ties typically used?

Tension ties are commonly used in deck construction, shearwalls, and braced wall panels. They resist heavy tension forces and are often installed to tie framing members together, preventing separation under load.

Do holdowns and tension ties come galvanized?

Most Simpson Strong-Tie holdowns and tension ties are manufactured with galvanized finishes to provide corrosion resistance and long-term durability. Always check product specifications to confirm the finish is suitable for your environment.

What is the difference between a tension tie and a holdown?

Holdowns are designed to resist vertical uplift forces on walls and framing members, helping to keep structures anchored during high wind or seismic events. Tension ties, on the other hand, are built to handle horizontal or lateral loads, tying framing elements together to prevent separation. For example, heavy-duty models like the HTT provide strong wood-to-concrete connections in post-pour applications where high tension resistance is required.

What is tension bridging?

Tension bridging is a connector system that strengthens floor assemblies by bracing joists together. Installed in pairs, it helps keep joists aligned, prevents rotation, and spreads loads across multiple members, resulting in a stiffer, more durable floor structure.

What is a Simpson Strong-Tie girder tiedown?

A girder tie is a metal connector designed for moderate- to high-load applications with girder trusses. These load-rated connectors help resist high-wind forces and are suitable for both new construction and retrofit applications.