Simpson CJT3ZS CJTZ 12-Gauge ZMAX Galvanized Concealed Joist Tie with Short Pins by Simpson Strong-Tie is a heavy-duty concealed connector engineered to create strong, hidden connections between joists and headers, posts, or beams in structural framing applications. Built from 12-gauge steel with a ZMAX galvanized finish, this connector delivers superior corrosion resistance, making it well suited for exterior environments and treated-wood applications. The CJTZ can be installed three ways - with no routing of header/post or beam, a routed header/post, or a routed beam - providing versatile installation flexibility on the job site.

Key Features

• Center dowel in beam for proper load transfer and alignment
• Short dowel (1/2 in. x 2-3/4 in.) for use with 3-1/8 in. glulam beam, 4x sawn lumber, or 3-1/2 in.-wide PSL
• Made from 12-gauge steel for structural strength and durability
• ZMAX galvanization offers extra corrosion resistance for exterior and treated-wood applications
• Install only in glulam, composite lumber (PSL, LSL, and LVL), or well dried lumber
• Dowels aligned across the grain may cause splitting if the wood shrinks excessively - proper lumber selection is essential
• Part of a concealed connector system that includes the CPTZ and CBTZ for complete concealed framing solutions
• Made in the United States

Specifications

• MPN: CJT3ZS
• Brand: Simpson Strong-Tie
• Coating / Finish: ZMAX
• Gauge: 12
• Pin Length: 2-3/4 in.
• Pin Diameter: 1/2 in.
• Country of Origin: United States

Approved Applications

• Glulam beams (3-1/8 in. width)
• 4x sawn lumber (well dried)
• Composite lumber including PSL (3-1/2 in.-wide), LSL, and LVL
• Exterior framing and treated-wood construction where enhanced corrosion resistance is required
• Concealed joist-to-beam, joist-to-header, and joist-to-post connections

What's Included

• Short pins - 2-3/4 in. length x 1/2 in. diameter
• All required SDS screws

Frequently Asked Questions

What are the three installation methods for the CJTZ concealed joist tie?

The CJTZ can be installed three ways: with no routing of the header/post or beam, with a routed header/post, or with a routed beam. This flexibility allows contractors to choose the method that best suits the framing conditions on their job site.

What lumber types are compatible with the CJT3ZS?

This connector is approved for use only in glulam, composite lumber (PSL, LSL, and LVL), or well dried sawn lumber. The short dowel (1/2 in. x 2-3/4 in.) is specifically sized for 3-1/8 in. glulam beams, 4x sawn lumber, or 3-1/2 in.-wide PSL.

Why does the CJT3ZS feature ZMAX galvanization instead of standard galvanizing?

ZMAX galvanization provides extra corrosion resistance compared to standard galvanized coatings, making the CJT3ZS suitable for exterior applications and use with treated lumber where exposure to moisture or corrosive environments is a concern.

Does the CJT3ZS come with all necessary fasteners, and what tools are needed?

Yes - the CJT3ZS is supplied with all dowels and screws required for installation. The included screws require a hex-head driver to install properly.

Note: Product dimensions and/or screw or bolt holes may differ from picture. Please see the item description for specifications. Dowels aligned across the grain may cause splitting if the wood shrinks excessively; install only in glulam, composite lumber (PSL, LSL, and LVL), or well dried lumber.