The Simpson Strong-Tie ATRM 3/4 in. x 24 in. All-Thread Rod, Grade 55 is a fully threaded structural rod engineered to serve as a tension transfer element within systems designed to resist seismic and wind forces. Built from uncoated black steel meeting ASTM A36 standards with a minimum yield strength of 55 ksi and minimum tensile strength of 75 ksi, this all-thread rod delivers a continuous and reliable load path from roof to foundation - making it a trusted choice for shearwall overturning restraint, roof uplift restraint applications, and adhesive anchor rod installations. Precut to a convenient 24-inch length, it integrates directly into continuous rod tiedown systems and uplift restraint systems without additional cutting or preparation.

Key Features

• Precut 24 in. length - arrives ready to install, eliminating the need for on-site cutting and saving time during structural assembly.
• Grade 55 specification (Fy = 55 ksi, Fu = 75 ksi) - delivers the elevated yield and tensile strength required for structural tension transfer in seismic and wind-resistance systems.
• ASTM A36 material standard - ensures the rod meets a widely recognized structural steel benchmark, supporting compliance with engineering specifications.
• UNC Class 2A thread specification - provides a standardized thread fit for reliable engagement with compatible nuts, couplers, and tiedown hardware in continuous rod systems.
• Fully threaded along entire 24 in. length - allows flexible positioning and adjustment at any point along the rod, accommodating varying installation depths and connector placements.
• Uncoated black steel finish - suitable for interior structural applications where a protective coating is not required, keeping the rod ready for immediate use.
• 3/4 in. rod diameter - sized to work within strong-rod tiedown system components designed for this common structural rod diameter.

Why This Product

• Designed specifically as a tension transfer element within continuous rod tiedown systems, this rod addresses the structural need for an uninterrupted load path from roof to foundation in seismic and high-wind construction.
• The Grade 55 strength rating and ASTM A36 compliance mean engineers and inspectors can verify the rod's performance characteristics against published specifications - reducing uncertainty on the job site.
• Full threading along the entire rod length gives installers the flexibility to position hardware anywhere along the 24-inch span, adapting to field conditions without compromising structural integrity.
• With its precut length and UNC Class 2A thread standard, this rod is ready to pair with compatible tiedown hardware and adhesive anchor systems, streamlining the assembly process for both shearwall and roof uplift applications.

Specifications

• Brand: Simpson Strong-Tie
• MPN: ATRM6-2
• Rod Diameter: 3/4 in.
• Rod Length: 24 in.
• Material: Uncoated Steel
• Finish: Uncoated Steel
• Color: Black
• Thread Specification: UNC Class 2A
• Steel Standard: ASTM A36
• Yield Strength (Fy): 55 ksi
• Tensile Strength (Fu): 75 ksi
• 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 forces
• Structural systems designed to resist wind forces

Frequently Asked Questions

What is this all-thread rod used for?

The ATRM6-2 is designed as a tension transfer element for structural systems that resist seismic and wind forces. It is used within continuous rod tiedown systems for shearwall overturning restraint, uplift restraint systems for roofs, and as an adhesive anchor rod in various other structural applications.

What are the strength ratings for this threaded rod?

This rod meets Grade 55 specifications per ASTM A36, with a minimum yield strength (Fy) of 55 ksi and a minimum tensile strength (Fu) of 75 ksi. These ratings are critical for verifying suitability in engineer-designed load path systems.

What thread standard does this rod use?

The ATRM6-2 uses a UNC Class 2A thread specification. This standardized thread form ensures proper fit and reliable engagement when paired with compatible nuts, couplers, and tiedown hardware used in strong-rod systems.

Does this rod come precut or does it need to be cut to length on site?

This rod comes precut to a 24-inch length, so no field cutting is required. Because it is fully threaded along its entire length, hardware can be positioned anywhere along the rod to accommodate varying installation requirements.