The Simpson Strong-Tie ATRM 5/8 in. x 12 in. All-Thread Rod, Grade 55 is a fully threaded steel rod engineered as a tension transfer element for structural systems designed to resist seismic and wind forces. Built to deliver a continuous and reliable load path from roof to foundation, this precut threaded rod is a core component in continuous rod tiedown systems for shearwall overturning restraint and in uplift restraint systems for roof applications. Its fully threaded profile also makes it suitable for use as an adhesive anchor rod in a variety of structural and construction contexts.

Key Features

• Precut 12 in. length - ready to install without field cutting, saving time and reducing jobsite waste during structural assembly.
• Grade 55 specification (ASTM A36; Fy = 55 ksi, Fu = 75 ksi) - delivers the tensile and yield strength required for engineered seismic and wind-force-resisting systems.
• UNC Class 2A thread specification - ensures compatibility with standard hardware and connectors used in continuous rod tiedown and uplift restraint systems.
• 5/8 in. rod diameter - sized for use in shearwall overturning restraint applications and adhesive anchor installations where precise load transfer is critical.
• Uncoated black steel construction - provides a clean, consistent surface ideal for applications where coatings are not required or where field treatment will be applied after installation.
• Fully threaded (all-thread rod) design - allows connection points anywhere along the rod's length, offering maximum flexibility in tension transfer and tiedown configurations.

Why This Product

• Designed specifically for seismic and wind-force-resisting structural systems, this all-thread rod provides a proven, continuous load path from roof to foundation - addressing one of the most critical requirements in shearwall and uplift restraint design.
• The precut 12 in. length eliminates the need for on-site cutting and measuring, making it a practical choice for contractors and installers working within tight framing schedules or precise engineering specifications.
• With a Grade 55, ASTM A36 rating and UNC Class 2A threading, this rod meets widely recognized structural standards, supporting use in engineered tiedown systems where material certification and thread compatibility are required for code compliance.
• Beyond tiedown systems, the fully threaded profile enables use as an adhesive anchor rod, giving builders a single versatile fastening solution across multiple structural applications on the same project.

Specifications

• Brand: Simpson Strong-Tie
• MPN: ATRM5-1
• Rod Diameter: 5/8 in.
• Rod Length: 12 in.
• Thread Specification: UNC Class 2A
• Material Grade: Grade 55
• Material Standard: ASTM A36; Fy = 55 ksi & Fu = 75 ksi
• Material: Uncoated Steel
• Finish: Uncoated Steel
• Color: Black
• Product Class: Threaded Rod
• Quantity: 1
• Country of Origin: United States
• Prop 65: No

Approved Applications

• Continuous rod tiedown systems for shearwall overturning restraint
• Uplift restraint systems for roof applications
• Adhesive anchor rod installations
• Structural systems designed to resist seismic and wind forces

Frequently Asked Questions

What structural systems is the ATRM5-1 designed for?

The ATRM5-1 is designed as a tension transfer element for structural systems built to resist seismic and wind forces. It is used in continuous rod tiedown systems for shearwall overturning restraint and in uplift restraint systems for roofs, providing a continuous load path from roof to foundation. It can also be used as an adhesive anchor rod in other applications.

What thread standard does this all-thread rod follow?

This rod is manufactured to the UNC Class 2A thread specification, which ensures compatibility with standard connectors and hardware used in engineered tiedown and uplift restraint system assemblies.

What is the material grade and strength rating of this threaded rod?

The ATRM5-1 meets Grade 55 specifications per ASTM A36, with a minimum yield strength of 55 ksi (Fy = 55 ksi) and a minimum tensile strength of 75 ksi (Fu = 75 ksi). This strength level supports its use in engineered, load-bearing structural connections.

Is this rod precut, or does it require field cutting?

This rod is precut to 12 in. in length, which means it arrives ready for installation without requiring field cutting or measuring. This makes it a convenient option for projects where consistent, precise rod lengths are needed across multiple assembly points.