The Simpson Strong-Tie ATRM 7/8 in. x 24 in. All-Thread Rod, Grade 55 is a fully threaded structural rod engineered as a tension transfer element for continuous load path systems designed to resist seismic and wind forces. Manufactured by Simpson Strong-Tie, this precut all-thread rod is built for use in anchor tiedown systems for shearwall overturning restraint, uplift restraint systems for roof applications, and adhesive anchor rod installations - delivering reliable structural performance from roof to foundation.

Key Features

• Precut 24 in. length - ready to install without field cutting, saving time and reducing setup on the jobsite
• Grade 55 specification - meets elevated strength requirements with a minimum yield strength of 55 ksi (Fy) and ultimate tensile strength of 75 ksi (Fu), ensuring the rod can handle demanding structural loads
• ASTM A36 material standard - conforms to a widely recognized structural steel specification, supporting engineer-of-record approval and code compliance
• UNC Class 2A thread specification - provides a standardized thread fit compatible with structural nuts, couplers, and tiedown hardware used in continuous rod systems
• 7/8 in. rod diameter - sized for use in heavy-duty shearwall tiedown and uplift restraint applications where significant lateral and uplift forces must be transferred
• Uncoated black steel finish - suitable for interior structural applications where direct contact with corrosive environments is not a concern, keeping installed cost straightforward
• Fully threaded along entire length - allows placement of hardware, couplers, or nuts at any point along the rod, maximizing installation flexibility within a continuous rod tiedown system

Why This Product

• Designed for seismic and wind force resistance - the ATRM is specifically engineered as a tension transfer element in structural systems that must resist lateral and uplift forces, making it a purpose-built solution rather than a generic threaded rod
• Supports a continuous and reliable load path from roof to foundation - when used in shearwall overturning restraint or roof uplift restraint systems, this rod provides the uninterrupted structural connection that building codes require for high-wind and seismic zones
• Versatile across multiple structural applications - beyond tiedown systems, it can also function as an adhesive anchor rod, giving engineers and contractors flexibility to use one product across different project needs
• Made in the United States and backed by Simpson Strong-Tie - produced domestically to Grade 55 and ASTM A36 standards by a trusted name in structural connectors and fastening systems

Specifications

• Brand: Simpson Strong-Tie
• MPN: ATRM7-2
• Rod Diameter: 7/8 in.
• Rod Length: 24 in.
• Product Class: Threaded Rod
• Material: Uncoated Steel
• Finish: Uncoated Steel
• Color: Black
• Grade: Grade 55
• Thread Specification: UNC Class 2A
• Material Standard: ASTM A36
• Yield Strength (Fy): 55 ksi
• Ultimate Tensile Strength (Fu): 75 ksi
• Quantity: 1
• Country of Origin: United States
• Prop 65: No

Approved Applications

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

Frequently Asked Questions

What makes this rod suitable for seismic and wind force applications?

The ATRM is specifically designed as a tension transfer element that provides a continuous and reliable load path from roof to foundation. Its Grade 55 specification - with a yield strength of 55 ksi and ultimate tensile strength of 75 ksi - gives it the capacity to handle the demanding tension loads generated by seismic and wind events in shearwall tiedown and roof uplift restraint systems.

Can this all-thread rod be used as an adhesive anchor rod?

Yes. In addition to its primary role in continuous rod tiedown systems for shearwall overturning restraint and roof uplift restraint, the ATRM 7/8 in. x 24 in. all-thread rod is also suitable for use as an adhesive anchor rod, making it versatile across multiple structural applications.

What thread specification does the ATRM7-2 use?

This rod uses a UNC Class 2A thread specification, which is the standard unified coarse thread profile commonly used with structural nuts, couplers, and tiedown hardware found in continuous rod systems.

Is the uncoated steel finish appropriate for all installation environments?

The ATRM7-2 features an uncoated black steel finish and is manufactured from uncoated steel. This finish is appropriate for interior structural applications. For installations in environments where corrosion resistance is a requirement, consult the project engineer to confirm material suitability based on the specific exposure conditions.