CBTZ Concealed Beam Tie
CBTZ, the newest addition to the concealed structural connector line, combines structural strength with invisibility. Designed to connect horizontal beams atop a vertical post, the CBTZ continues the structural load path into the foundation through the CPTZ. The simplistic cylindrical design allows installations with a common drill bit, eliminating challenging kerf cuts. The CBTZ is available in two models designed to connect beams and posts of a variety of sizes. It is part of a concealed connector system that includes the CPTZ and CJT.
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
Finish
- CBT — ZMAX® coating; the 1/2"-diameter drift dowels are mechanically galvanized in accordance with ASTM B695, Class 55
Installation
- Use all specified fasteners; see General Notes
- 1/2" dowels included
- CBT2Z requires a minimum 6"-deep nominal beam
- For step-by-step installation instructions, see technical bulletin CBTZ Concealed Beam Tie Installation Instructions (T-C-CBTZINS) or view our video in the image gallery
Related Links
Catalog Pages
Related Literature
Load Tables
These products are available with additional corrosion protection. Additional products on this page may also be available with this option, check with Simpson Strong-Tie for details.
| Model No.
| Post (min.)
| Beam (min.)
| Dimensions (in.)
| Fasteners
| Allowable Loads (lbs.) – DF/SP
|
| Dia.
| H
| Qty.
| Type
| Continuous Beam
| End of Beam
|
| Post
| Beam
| Uplift (160)
| Lateral (160)
| Down (100)
| Uplift (160)
| Lateral (160)
| Down (100)
|
| CBT2Z |
4x4 |
4x6 |
1 1/4 |
10 |
2 |
2 |
1/2" x 3 1/4" dowel pin |
2,020 |
750 |
6,890 |
1,585 |
550 |
6,890 |
| 1/2" MB |
| CBT4Z |
6x6 |
6x8 |
1 1/4 |
14 |
3 |
3 |
1/2" x 4 3/4" dowel pin |
4,215 |
1,655 |
18,140 |
3,695 |
1,055 |
18,140 |
| 1/2" MB |
- Uplift and lateral loads have been increased for wind or earthquake with no further increase allowed; reduce where other loads govern.
- Lateral load is in the direction parallel to the beam.
- Alternate 1/2"-diameter hex or square head machine bolts may be used for loads listed.
- Lag or carriage bolts are not permitted.
- Structural composite lumber columns have sides that show either the wide face or the edges of the lumber strands/veneers. Values in the tables reflect dowel or bolt installation into the wide face.
- Spliced condition must be detailed by Designer.
|
Code Reports
| Part | IAPMO UES ER | ICC-ES ESR | City of Los Angeles | State of Florida |
|
CBT2Z |
ER-280 |
|
|
|
|
CBT4Z |
ER-280 |
|
|
|
Drawings
| Part |
Orthographic |
Perspective |
| CBT2Z |
|
|
| CBT4Z |
|
|
Conectores para la construcción en madera 2017–2018C-C-2017SPInformación completa de productos, de la aplicación, de las tablas de cargas y de la instalación, para más de 3,000 conectores de madera a madera, madera a concreto y concreto a mampostería.Catalog
Keep It Hidden - New CBTZ Concealed Beam TieF-C-CBTZ15The new CBTZ Concealed Beam Tie provides a concealed beam-to-post connection that combines structural strength with invisibility for custom indoor or outdoor living space applications.Flier
CBTZ Concealed Beam Tie Installation InstructionsT-C-CBTZINS15The CBTZ concealed beam tie installation instructions offers step-by-step guidance in English, Spanish and French.Technical Bulletin
Connectors Installed on SCL ColumnsT-C-SCLCLM16A one-page, single-sided technical bulletin discussing the structural properties of the two different surface sides of SCL columns, including the listing of reduction factors.Technical Bulletin
Allowable Loads for Concealed Beam Tie (CBTZ) Alternate Installation DetailsL-C-CBTZALT17This letter summarizes allowable loads for alternate installations of the CBTZ connectors with multi-ply beams, spliced beams and installed with the CJT concealed joist tie connectors.Engineering Letter
