The Simpson RTC22Z RTC 18-Gauge ZMAX Galvanized Rigid Tie Corner is a precision-engineered corner connector from Simpson Strong-Tie, built to create a strong, rigid 90 deg. connection between two nominal 2x horizontal members and a nominal 2x vertical post. Designed for workbench construction and storage shelving units, this connector replaces unreliable traditional corner-building techniques with a purpose-built solution that eliminates splitting risks and delivers consistent structural integrity. The ZMAX galvanized finish extends the connector's service life in exterior environments and treated-wood applications where standard coatings fall short.

Key Features

• Strong 90 deg. rigid corner connection - secures two nominal 2x members to a nominal 2x post without any play or flex, so workbenches and shelving units stay square and stable under load.
• No angled cuts or angled fastening required - simplifies installation and eliminates the wood-splitting risk that comes with toe-nailing or mitered joinery, saving time and protecting your material.
• Stronger than traditional corner construction methods - engineered and tested by Simpson Strong-Tie to outperform nailed or pocket-screwed corners, giving your project a longer, safer service life.
• Made from 18-gauge steel - provides a solid, heavy-duty connector profile that holds its shape during installation and stands up to the demands of loaded shelving and workbench applications.
• ZMAX galvanization - delivers extra corrosion resistance beyond standard coatings, making this connector a reliable choice for exterior builds and projects using treated lumber.
• Installs with #9 x 1-1/2 in. Strong-Drive SD screws - a fastener designed specifically for this connector type ensures full load transfer at every connection point and a clean, professional finish.

Why This Product

• Purpose-built for the connections that matter most - rather than relying on general-purpose hardware at structural corners, this connector is engineered specifically for 90 deg. post-and-member joints, so your workbench or shelving unit is as solid as the materials you put into it.
• Faster, cleaner builds with no specialty cuts - because no angled cuts or angled fastening are needed, even builders with basic tool setups can produce tight, professional-grade corners without the risk of splitting nominal 2x stock.
• ZMAX finish opens up more project locations - the enhanced galvanization means you can confidently use this connector in garages, covered outdoor areas, and anywhere treated lumber is specified, without worrying about premature corrosion compromising the joint.
• Backed by Simpson Strong-Tie engineering and quality standards - every connector in the Simpson Strong-Tie line is manufactured and tested to strict performance benchmarks, so you get a connector that performs as specified every time, not just on paper.

Specifications

• Model Number: RTC22Z
• Gauge: 18
• Coating/Finish: ZMAX
• Member Size: 2x post; 2x joist
• Install With: #9 x 1-1/2 in. Strong-Drive SD screws (sold separately)
• Country of Origin: United States

Approved Applications

• Workbench construction requiring strong, rigid corner connections
• Storage shelving unit construction
• Exterior applications where corrosion resistance is required
• Projects involving treated wood where enhanced galvanization is needed

Frequently Asked Questions

What size lumber is the RTC22Z designed to work with?

The RTC22Z is designed for use with nominal 2x members. It connects two nominal 2x2 horizontal members to a nominal 2x2 vertical post, forming a 90 deg. corner.

What fasteners are required to install the RTC22Z?

The RTC22Z should be installed with #9 x 1-1/2 in. Strong-Drive SD screws.

Why is the ZMAX finish important for this connector?

The ZMAX galvanization provides extra corrosion resistance, making the RTC22Z suitable for exterior applications and projects involving treated wood, where standard finishes may be insufficient.

Is the RTC22Z stronger than traditional corner construction methods?

Yes. The RTC22Z is stronger than other methods of corner construction and eliminates the need for angled cuts or angled fastening, which can split the wood and weaken the joint.