The Simpson RTC42Z Rigid Tie Corner Connector is a purpose-built metal connector from Simpson that secures two horizontal 2x joists to a vertical 4x4 post at a precise 90 deg. angle, delivering a square, sturdy corner joint for workbenches, storage shelving units, and similar structural builds. Formed from 18-gauge steel with a ZMAX galvanized finish, this rigid tie is engineered to outperform traditional corner construction methods while eliminating the need for angled cuts or angled fastening that can weaken or split the wood.

Key Features

• Strong 90 deg. corner connection - locks two horizontal members to a vertical post at a precise right angle, keeping your workbench or shelving unit square and stable over time
• No angled cuts or angled fastening required - simplifies installation and eliminates the risk of splitting the wood that angled techniques can cause
• Stronger than other methods of corner construction - provides a more reliable joint than toe-nailing or traditional woodworking corner approaches, adding long-term structural confidence
• 18-gauge steel construction - delivers the rigidity and load-bearing capacity needed for demanding shop and storage applications without adding bulk
• ZMAX galvanized coating - offers extra corrosion resistance beyond standard galvanization, making this connector well suited for exterior use and for projects built with pressure-treated lumber
• Installs with SD8x1.25 Strong-Drive screws - uses a specified fastener for consistent, code-aligned performance so there is no guesswork on the jobsite

Why This Product

• Built for real-world durability in tough environments - the ZMAX galvanized finish provides extra corrosion resistance specifically suited for exterior conditions and contact with pressure-treated wood, protecting the connector where standard hardware would degrade
• Faster, safer installation than traditional methods - by eliminating the need for angled cuts or angled fastening, the RTC42Z reduces prep time and removes a common cause of split lumber, making corner assembly cleaner and more repeatable
• A stronger corner right out of the box - this rigid tie is stronger than other methods of corner construction, meaning workbenches and shelving units built with it are more resistant to racking and long-term wear without relying on additional bracing
• Fits common lumber dimensions used in utility builds - designed specifically for a nominal 4x4 post and nominal 2x joist, making it a direct fit for the framing sizes most commonly used in shop furniture and heavy-duty storage projects

Specifications

• Model Number: RTC42Z
• Member Size: 4x4 post; 2x joist
• Gauge: 18
• Coating: ZMAX
• Finish: ZMAX
• Country of Origin: United States
• Install With: SD8x1.25 Strong-Drive screws (sold separately)

Approved Applications

• Workbench construction requiring rigid, square corner connections
• Storage shelving unit assembly
• Exterior applications where corrosion resistance is required
• Projects using pressure-treated wood where enhanced galvanization is necessary

Frequently Asked Questions

What wood member sizes is the RTC42Z designed to work with?

The RTC42Z is designed for use with a nominal 4x4 post and a nominal 2x joist, securing two horizontal members to a vertical post at a 90 deg. corner.

Why is the ZMAX coating important for this connector?

ZMAX galvanization offers extra corrosion resistance, making the RTC42Z suitable for exterior applications and use with pressure-treated wood where standard galvanization may not provide adequate protection.

What fasteners are required to install the RTC42Z?

The RTC42Z should be installed with SD8x1.25 Strong-Drive screws for proper performance and connection strength.

How does the RTC42Z compare to traditional corner construction methods?

The RTC42Z 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.

Note: Product dimensions and/or screw holes may differ from picture. Please see item description for specifications.