The Simpson ATR 1-1/4 in. x 48 in. Zinc-Plated All-Thread Rod is a fully threaded tension transfer element engineered by Simpson for use with Simpson Strong-Tie adhesives in demanding structural applications. Designed to support floor-to-floor holdown connections and a wide range of anchoring solutions, this zinc-plated steel rod delivers the versatility and dependability that structural installation requires. The rod is fully threaded along its entire length, giving installers maximum flexibility for cutting and positioning on the job site.

Key Features

• Fully threaded along the entire length - allows the rod to be cut to any required length without losing thread engagement, reducing material waste and simplifying installation adjustments.
• Cut to length for convenience - saves time on site by eliminating the need to source custom-cut rods, making it adaptable to a variety of structural configurations.
• 1-1/4 in. diameter construction - provides the load-bearing cross-section needed for heavy-duty tension transfer in holdown and anchoring applications.
• 48 in. length - offers sufficient reach for floor-to-floor holdown connections and other applications where extended anchor depth is required.
• Zinc-plated steel construction - delivers a protective finish suited for interior structural applications, with hot-dipped galvanized options available for environments requiring a different level of corrosion resistance.
• UNC Class 2A or 1A thread specifications - ensures compatibility with standard UNC-threaded nuts and hardware, simplifying procurement and reducing the risk of mismatched components on site.

Why This Product

• Purpose-built for adhesive anchor systems - designed specifically for use with Simpson Strong-Tie adhesives, this all-thread rod integrates seamlessly into proven adhesive anchoring systems for structural holdown and anchoring applications.
• Versatile form factor reduces job site complexity - because the rod is fully threaded from end to end, a single 48 in. rod can be cut and positioned to meet multiple project requirements, reducing the need to stock multiple part lengths.
• Trusted domestic engineering - produced to UNC Class 2A or 1A thread standards, the rod is built to consistent dimensional tolerances that support reliable hardware compatibility across structural connections.
• Finish options match your exposure conditions - the zinc-plated finish suits standard interior structural use, while the availability of a hot-dipped galvanized version means the same ATR rod design can be specified across projects with varying environmental demands.

Specifications

• Model Number: ATR1-1/4X48ZP
• Brand: Simpson Strong-Tie
• Material: Steel
• Coating: Zinc Plated
• Finish: Zinc Plated
• Diameter: 1-1/4 in.
• Length: 48 in.
• Thread Specification: UNC Class 2A or 1A
• Country of Origin: United States

Approved Applications

• Tension transfer in structural holdown systems
• Floor-to-floor holdown connections
• Use with Simpson Strong-Tie adhesives for anchoring solutions
• Wide range of structural anchoring applications

Frequently Asked Questions

Is this rod threaded along its entire length?

Yes. The ATR1-1/4X48ZP is fully threaded along the entire length of the rod, providing maximum flexibility for cutting and positioning in structural applications.

What thread specification does this all-thread rod use?

This rod meets UNC Class 2A or 1A thread specifications, ensuring compatibility with standard UNC-threaded nuts and hardware designed for these classes.

What finish is applied to this all-thread rod?

This rod features a zinc-plated steel finish. Simpson Strong-Tie ATR rods are also available in a hot-dipped galvanized finish for applications requiring a different level of corrosion resistance.

What is this all-thread rod designed to be used with?

The ATR is a tension transfer element designed for use with Simpson Strong-Tie adhesives. It is suited for structural applications including floor-to-floor holdowns and a wide range of other anchoring solutions.

Note: Product dimensions and/or thread length may differ from picture. Please see the item description above for specifications.