The Simpson CBT2Z-KT Concealed Beam Tie from Simpson is a 12-gauge structural connector engineered to join horizontal beams atop a vertical post while keeping all hardware completely hidden from view. Part of a broader concealed connector system that includes the CPTZ and CJT, this post-to-beam connector continues the structural load path into the foundation through the CPTZ, delivering reliable performance without sacrificing a clean, hardware-free appearance. Its cylindrical profile allows installation using a common drill bit - no kerf cuts or specialty tools required - and ZMAX galvanization provides enhanced corrosion resistance for exterior framing and treated-lumber applications. The kit includes four 1/2 in. x 3-1/4 in. mechanically galvanized drift dowels, so installation hardware is ready to go right out of the box.

Key Features

• Flattened sides serve as a built-in template - simplify layout and hole placement during installation, reducing the chance of alignment errors.
• Locator tabs provide proper dimensional layout - take the guesswork out of positioning so the connector seats correctly every time.
• Orientation markings distinguish the post end from the beam end - eliminate confusion during installation and help ensure the connection is made correctly the first time.
• Cylindrical design installs with a common drill bit - no kerf cuts or specialty saws needed, making the installation process faster and more straightforward for framers.
• ZMAX galvanization on the connector body - offers extra corrosion resistance suited to exterior applications and contact with treated wood, where standard galvanized finishes may fall short.
• Included 1/2 in.-diameter drift dowels are mechanically galvanized in accordance with ASTM B695, Class 55 - ensures the fasteners match the corrosion-resistance level of the connector itself in demanding environments.
• Made from 12-gauge steel - provides the structural integrity required for load-bearing post-to-beam framing connections in wood construction.
• Sized for a nominal 4x4 post - fits standard lumber dimensions used in residential and general wood framing, so no custom modifications are needed.

Why This Product

• Structural strength with a concealed finish - unlike traditional post-to-beam hardware that leaves metal brackets and bolts exposed, this connector hides entirely within the wood members, preserving the visual appearance of the structure without compromising load transfer.
• Simplified installation with no special cuts - the cylindrical form installs with a standard drill bit, and built-in features like flattened template sides, locator tabs, and orientation markings guide the installer through the process, reducing labor time and the risk of costly mistakes.
• Built for treated-wood and exterior framing - ZMAX-coated steel on the connector and mechanically galvanized dowels meeting ASTM B695, Class 55 make this system a durable choice for decks, pergolas, and other outdoor wood structures where moisture and treated chemicals are a concern.
• Part of an integrated concealed connector system - the CBT2Z-KT is designed to work alongside the CPTZ post base and CJT connectors, allowing builders to maintain a continuous, hidden structural load path from beam to foundation across the entire framing assembly.

Specifications

• MPN: CBT2Z-KT
• Brand: Simpson Strong-Tie
• Gauge: 12-gauge
• Finish / Coating: ZMAX
• Material: Carbon Steel
• Dimensions: 1-1/4 in. x 10 in.
• Member / Post Size: 4x4 nominal
• Depth: 1-1/4 in.
• Height: 10 in.
• For Treated Lumber: Yes
• Install With: Install with (4) 1/2 in. x 3-1/4 in. dowels (included) or 1/2 in. bolts
• Country of Origin: United States

Approved Applications

• General Framing

What's Included

Each kit contains (1) CBT2Z-KT Concealed Beam Tie, (4) 1/2 in. x 3-1/4 in. dowels.

Downloads and Resources

• View Spec Sheet

Frequently Asked Questions

What type of connection does the CBT2Z-KT make?

The CBT2Z-KT is designed to connect horizontal beams atop a vertical post. It is part of a concealed connector system that continues the structural load path into the foundation through the CPTZ, providing a strong post-to-beam connection with no exposed hardware.

Does this connector require special tools or cuts for installation?

No special tools or kerf cuts are required. The simplistic cylindrical design allows installation with a common drill bit. Flattened sides let the installer use the CBTZ itself as a template, and locator tabs ensure proper dimensional layout.

Why is the ZMAX finish important for this connector?

ZMAX galvanization on the CBTZ offers extra corrosion resistance, making it suitable for exterior applications and use with treated wood where standard finishes may be insufficient. The included 1/2 in.-diameter drift dowels are also mechanically galvanized in accordance with ASTM B695, Class 55 for consistent corrosion protection throughout the assembly.

Is this connector part of a larger concealed hardware system?

Yes. The CBT2Z-KT is part of a concealed connector system that includes the CPTZ concealed post base and the CJT concealed joist tie, allowing for a completely concealed structural design throughout a project.

Related Products

• CPTZ concealed post bases
• CJT concealed joist ties

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