Product Description
The Simpson CJT5ZL CJTZ Concealed Joist Tie with Long Pins is a 12-gauge steel connector engineered to create strong, hidden joist-to-beam and header/post connections in timber framing. Designed for flexibility, this concealed connector supports three installation methods: with no routing of the header, post, or beam; with a routed header or post; or with a routed beam - so contractors and builders can adapt to job-site conditions without compromising structural integrity. The CJT5ZL is part of a complete concealed connector system that includes the CPTZ and CBTZ, and its ZMAX galvanized finish delivers extra corrosion resistance suited for exterior environments and treated-wood applications.
Key Features
- Three installation methods supported - install with no routing, a routed header or post, or a routed beam, giving you the flexibility to work around varying framing conditions on the job site.
- Long pins (1/2 in. x 4-3/4 in.) included - sized specifically for 5-1/8 in. glulam beams, 6x sawn lumber, or greater widths, so the hardware is ready to use without sourcing additional fasteners.
- All required dowels and SDS screws supplied - everything needed for a complete installation comes in the package, reducing trips to the supplier and keeping your project on schedule.
- ZMAX galvanized coating - provides extra corrosion resistance beyond standard galvanization, making this connector a reliable choice for exterior framing and pressure-treated lumber applications.
- 12-gauge steel construction - delivers the structural strength needed for concealed joist and beam connections while keeping the connector profile tight and hidden from view.
- Compatible with glulam, PSL, LSL, LVL, and well-dried sawn lumber - broad engineered lumber compatibility means this tie works across a wide range of modern and traditional timber framing assemblies.
- Center dowel placement in beam - ensures proper load transfer and alignment, which is critical for maintaining the structural integrity of the connection over time.
- Part of the CPTZ and CBTZ concealed connector system - integrates with coordinating connectors for complete post, beam, and joist connections throughout a structure using a unified, low-profile system.
Why This Product
- Truly concealed hardware for a clean finish - the CJTZ design keeps all connector hardware hidden once installed, making it the right choice for exposed timber framing where visible metal brackets are not acceptable.
- Installation-ready out of the box - because all required pins and screws are included and the connector supports three routing configurations, this tie reduces pre-job planning time and on-site improvisation.
- Built for demanding environments - ZMAX galvanization goes beyond standard corrosion protection, making this connector a dependable option for outdoor structures, covered porches, and framing assemblies using treated lumber.
- Works within a complete connector system - pairing the CJT5ZL with the CPTZ and CBTZ connectors gives structural designers and builders a fully coordinated, code-compatible concealed connection solution for posts, beams, and joists in a single project.
Specifications
- Manufacturer Part Number (MPN): CJT5ZL
- Series: CJTZ
- eCommerce Name: Simpson CJT5ZL CJTZ 12-Gauge ZMAX Galvanized Concealed Joist Tie with (5) Long Pins
- Coating / Finish: ZMAX Galvanized
- Gauge: 12-Gauge Steel
- Pin Length: 4-3/4 in.
- Pin Diameter: 1/2 in.
- Compatible Beam Sizes: 5-1/8 in. glulam beam, 6x sawn lumber or greater widths
- Compatible Lumber Types: Glulam, PSL, LSL, LVL, or well-dried sawn lumber
- Connector Type: Concealed Joist Tie
- Height 1: 8-9/16 in.
- Height 2: 7-7/16 in.
- Country of Origin: United States
Approved Applications
- Concealed joist-to-beam and header/post connections in timber framing
- Installations requiring a flush, hidden connector with no visible hardware
- Exterior applications and treated-wood environments where corrosion resistance is required
- Use with 5-1/8 in. glulam beams, 6x sawn lumber, or greater widths
- Glulam, PSL, LSL, LVL, and well-dried sawn lumber installations
- Part of the CPTZ and CBTZ concealed connector system for complete structural connections
What's Included
- Simpson CJT5ZL CJTZ Concealed Joist Tie connector body
- Long pins - 4-3/4 in. length x 1/2 in. diameter (all dowels required for installation are included)
Frequently Asked Questions
- What types of lumber are compatible with the CJT5ZL?
- The CJT5ZL should only be installed in glulam, composite lumber (PSL, LSL, and LVL), or well-dried sawn lumber. The long pins (1/2 in. x 4-3/4 in.) are specifically designed for use with 5-1/8 in. glulam beams, 6x sawn lumber, or greater widths. Dowels aligned across the grain may cause splitting if the wood shrinks excessively, so proper lumber selection and drying are important.
- What hardware is included with the CJT5ZL, and what tools are needed for installation?
- The CJT5ZL comes supplied with all dowels and screws required for installation. It includes long pins measuring 4-3/4 in. in length and 1/2 in. in diameter. The included screws require a hex-head driver for installation.
- What are the three installation methods available for the CJT5ZL?
- The CJT5ZL can be installed three ways: with no routing of the header, post, or beam; with a routed header or post; or with a routed beam. This flexibility allows builders to achieve a fully concealed connection regardless of their specific structural configuration.
- Is the CJT5ZL suitable for exterior or treated-wood applications?
- Yes. The CJT5ZL features a ZMAX galvanized coating, which provides extra corrosion resistance beyond standard galvanized products, making it well-suited for exterior environments and applications involving treated wood.
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