The Simpson Strong-Tie ATRM 5/8 in. x 30 in. All-Thread Rod, Grade 55 is a fully threaded steel tension transfer element engineered for structural systems designed to resist seismic and wind forces. Built from uncoated black steel meeting ASTM A36 specifications with a minimum yield strength of 55 ksi and tensile strength of 75 ksi, this precut all-thread rod delivers a continuous and reliable load path from roof to foundation - making it an essential component in continuous rod tiedown systems, shearwall overturning restraint assemblies, and uplift restraint systems for roofs. Its UNC Class 2A thread specification and fully threaded design also make it suitable for use as an adhesive anchor rod in a wide range of structural and non-structural applications.

Key Features

• Precut 30 in. length - arrives ready to install without field cutting, saving labor time and reducing measurement error on the job site.
• Grade 55 specification (ASTM A36; Fy = 55 ksi, Fu = 75 ksi) - meets medium-strength structural rod requirements, providing predictable, engineered load performance in seismic and wind-resisting systems.
• UNC Class 2A thread specification - ensures compatibility with standard threaded couplers, bearing plates, and nuts used in continuous rod tiedown systems and anchor applications.
• Fully threaded design (all-thread rod) - allows the rod to be cut to custom lengths in the field if needed, and enables connection points at any position along the rod's length.
• Uncoated black steel construction - suited for interior structural applications where a protective coating is not required, keeping costs efficient without sacrificing structural integrity.
• 5/8 in. rod diameter - a standard structural diameter that pairs with a wide range of Simpson Strong-Tie tiedown hardware, couplers, and bearing plates.

Why This Product

• Engineered specifically as a tension transfer element for seismic and wind-force-resisting structural systems, this all-thread rod is designed to perform where continuous load path integrity from roof to foundation is required.
• The precut 30 in. length eliminates the need for field cutting in standard tiedown configurations, reducing installation time and ensuring consistent rod lengths across a project.
• With ASTM A36 material properties and Grade 55 strength ratings, this threaded rod provides verifiable, code-supportable structural performance for shearwall overturning restraint and uplift restraint applications.
• Its fully threaded profile allows versatility beyond tiedown systems - the same rod can serve as an adhesive anchor rod, making it a multi-application structural fastening solution on a single job site.

Specifications

• Brand: Simpson Strong-Tie
• MPN: ATRM5-2.5
• Product Class: Threaded Rod
• Rod Diameter: 5/8 in.
• Rod Length: 30 in.
• Grade: Grade 55
• Thread Specification: UNC Class 2A
• Material Standard: ASTM A36; Fy = 55 ksi & Fu = 75 ksi
• Material: Uncoated Steel
• Finish: Uncoated Steel
• Color: Black
• Quantity: 1
• Country of Origin: United States
• Prop 65: No

Approved Applications

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

Frequently Asked Questions

What structural applications is the ATRM5-2.5 all-thread rod designed for?

The ATRM5-2.5 is designed for use as a tension transfer element in structural systems that resist seismic and wind forces. Primary applications include continuous rod tiedown systems for shearwall overturning restraint, uplift restraint systems for roofs, and adhesive anchor rod installations.

What are the material strength properties of this threaded rod?

This all-thread rod meets ASTM A36 material standards with a minimum yield strength (Fy) of 55 ksi and a minimum tensile strength (Fu) of 75 ksi, qualifying it as a Grade 55 medium-strength structural rod.

What thread type and class does the ATRM5-2.5 use?

The rod uses a UNC (Unified National Coarse) Class 2A thread specification, which is the standard thread form used with structural couplers, bearing plates, and nuts in tiedown and anchor rod systems.

Does this all-thread rod have a protective coating or finish?

No - the ATRM5-2.5 is made from uncoated black steel with no applied protective coating. It is best suited for interior structural applications where an uncoated finish is acceptable for the project's exposure conditions.