The Simpson CBT4Z-KT Concealed Beam Tie Kit by Simpson Strong-Tie delivers a clean, hidden structural connection between horizontal beams and vertical posts without sacrificing load-path integrity. Part of Simpson Strong-Tie's concealed structural connector line, the CBTZ is engineered for a nominal 6x6 post and features a cylindrical design that installs using a common drill bit - eliminating the need for challenging kerf cuts. Finished with ZMAX galvanization for superior corrosion resistance, this connector is well suited for exterior and treated-wood applications where both structural performance and visual cleanliness are priorities.

Key Features

• Flattened sides assist installer while using the CBTZ as a template
• Locator tabs provide proper dimensional layout
• Required dowel pins included
• Orientation markings distinguish which end installs into the post and which end goes into the beam
• Dimensions: 1-1/4 in. x 14 in.
• Sized for a nominal 6x6 post
• Made from 12-gauge steel
• ZMAX galvanization on CBTZ offers extra corrosion resistance for exterior and treated-wood applications
• 1/2 in.-diameter drift dowels are mechanically galvanized in accordance with ASTM B695, Class 55
• Part of a concealed connector system that includes the CPTZ and CJT
• Simplistic cylindrical design allows installation with a common drill bit
• Continues the structural load path into the foundation through the CPTZ
• Made in the United States

Specifications

• Manufacturer: Simpson Strong-Tie
• MPN: CBT4Z-KT
• Finish / Coating: ZMAX
• Gauge: 12
• Dimensions: 1-1/4 in. x 14 in.
• Member / Post Size: 6x6 (nominal)
• Material: 12-gauge steel
• Dowel Diameter: 1/2 in.
• Dowel Galvanization Standard: ASTM B695, Class 55
• Installation Fasteners: Install with (6) 1/2 in. x 4-3/4 in. dowels (included) or 1/2 in. bolts
• Country of Origin: United States

Approved Applications

• General Framing

What's Included

Each kit contains (1) CBT4Z-KT Concealed Beam Tie, (6) 1/2 in. x 4-3/4 in. dowels.

Downloads and Resources

• View Spec Sheet

Frequently Asked Questions

What type of connection does the Simpson CBT4Z-KT make?

The CBTZ Concealed Beam Tie is designed to connect horizontal beams atop a vertical post. It continues the structural load path into the foundation through the CPTZ, making it a key component of Simpson Strong-Tie's concealed connector system, which also includes the CJT.

Is this connector suitable for exterior or treated-lumber applications?

Yes. The CBTZ features ZMAX galvanization, which offers extra corrosion resistance specifically suited for exterior and treated-wood applications. Additionally, the included 1/2 in.-diameter drift dowels are mechanically galvanized in accordance with ASTM B695, Class 55.

What tools and fasteners are needed to install the CBT4Z-KT?

The cylindrical design of the CBTZ allows installation using a common drill bit, eliminating the need for challenging kerf cuts. The connector installs with (6) 1/2 in. x 4-3/4 in. dowels, which are included in the kit, or 1/2 in. bolts. Flattened sides allow the CBTZ to be used as a template, and locator tabs assist with proper dimensional layout.

What post size is the CBT4Z-KT sized for?

The CBT4Z-KT is sized for a nominal 6x6 post. The connector measures 1-1/4 in. x 14 in. and is made from 12-gauge steel. Orientation markings on the connector clearly distinguish which end installs into the post and which end goes into the beam.