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CBT2Z
CBT2Z
CBT2Z Illustration
CBT2Z Illustration
CBT4Z
CBT4Z
CBTZ Steel Dowel
CBTZ Steel Dowel

The CBT Concealed Beam Tie is part of our concealed structural connector range, which combines structural strength with invisibility. Designed to connect horizontal beams atop a vertical post, the CBT continues the structural load path into the foundation through the CPT. The cylindrical design allows installations with a common drill bit. The CBT 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 CPT and CJT.

Please check Corrossion Information if it is suitable for your application.

Material

Carbon Steel 2.7mm thick

Finish

ZMAX® Galvanised

Features & Benefits
  • Manufactured in heavier gauge steel for a stronger connection 
  • Flattened sides enable installer to lay part on beam or post to mark where holes need to be drilled
  • Locator tabs provide proper dimensional layout of dowel pin holes
  • Clear markings distinguish which end installs into the post and which goes into the beam to help reduce installer error
  • Tested and load-rated engineering data available
  • Suitable for Glulam and solid sawn timber
  • Required dowel pins included
Installation
  • Use all specified fasteners
  • The CBT2Z requires a minimum 140mm deep beam
  • The CBT2Z Kit comes complete with 83mm dowels
Model No. Table

Model No.

Post Size Min. (mm)

Beam Size Min. (mm)

Dimensions (mm)

Dowel

Design Capacity (kN)

D

H

Qty

Dia. x L

Download

Continuous Beam

End of Beam

Post

Beam

Roof
k1 = 0.77

Floor
k1 = 0.69

Uplift
k1 = 1.14

Lateral
k1 = 1.14

Uplift
k1 = 1.14

Lateral
k1 = 1.14

CBT2Z-KT

90 x 90

140 x 90

32

254

2

2

1/2” (12.5mm) x 83mm

47.8

42.9

19.3

4.3

10.1

3.5

CBT4Z-KT

140 x 140

190 x 140

32

356

3

3

1/2(12.5mm) x 120mm

123.1

110.3

24.5

9.8

23.4

7.0

  1. Design Capacity is the lesser of (1) the Characteristic Capacity multiplied by the Australian Capacity Factor (φ) , and applicable the k1 modification factors following AS 1720.1 and (2) the Serviceability Capacity which is the load at 3.2 mm joint slip. Design Capacity is the minimum of test data and structural joint calculation.
  2. The Capacity Factor (φ) is 0.85 for nails and screws for structural joints in a Category 1 application. Reduce tabulated values where other Category applications govern.
  3. Duration of Load Factor (k1) is as shown. Reduce Duration of Load Factor (k1) where applicable. Capacities may not be increased.
  4. Timber species for joint design is seasoned Radiata Pine, which is Australia Joint Group JD4 per AS 1720.1 Table H2.4.
  5. Lateral loads is in the direction parallel to the beam.
  6. Lag or carriage bolts are not permitted.
  7. Structural composite timber columns have sides that show either the wide faces or the edges of the timber strands/veneers. Values in the table reflect dowel installation into the wide face.
  8. Spliced condition must be detailed by Designer.
  9. Loads shall be reduced where limited by the capacity of the timber post.
Brochures & Catalogues
Installation Guides

Installation Guides

PDF icon CBT Installation Guides
Technical Data & Docs

Technical Data Sheets

PDF icon Technical Data Sheet - CBT

Report Links

Warranty

Warranty

CAD Library
Alternative Products

Alternative Products

E5_Reinforced Angle Bracket

E5 Reinforced Angle Bracket is suitable for structural applications in framing and timber-frame houses for general connecting of timber at 90° angles. Typical applications include fixing trusses, studs, purlins, beams and posts.

The A21 and A23 Reinforced Angle Brackets provide a way to make a straight angle of 90° connection. The A21, A23 L shape angles are load rated, providing the correct thickness and number of fasteners.

A34

The versatile A34 and A35 Reinforced Angle Brackets provide a way to make a straight angle of 90° connection. The A35 Angle Bracket’s exclusive bending slot allows instant, accurate field bends for two and three-way ties.

Inspiration
Request a Demo

Request a Demo/Sample

Experience the innovation design of Simpson Strong-Tie's products and how we can help you build safer, stronger structures. Please fill out your details and submit the form below. We’ll be in touch to schedule a time to talk and give you a personal demo of Simpson Strong-Tie products.

Request a Demo/Sample

Experience the innovation design of Simpson Strong-Tie's products and how we can help you build safer, stronger structures. Please fill out your details and submit the form below. We’ll be in touch to schedule a time to talk and give you a personal demo of Simpson Strong-Tie products.

Structural Connections

 

Unmatched Quality from the Truss to the Foundation

With nearly 60 years of field and R&D experience, Simpson Strong-Tie® timber connectors are manufactured to the industry's highest standards. From framing angles to straps to heavy-duty joist hangers, we offer the most diverse product line so that you have the right product for the job.

Simpson Strong-Tie® connectors offer unmatched quality with laboratory and field testing, and are backed by our uncompromising commitment to customer service. As the company that built the connector industry, you can count on Simpson Strong-Tie® to work closely with builders, engineers and building officials to deliver innovative, building code-compliant solutions to help build safer, stronger structures economically. Download the Structural Connectors Overview Flyer.

Timber Connectors

From testing to service to availability, everything we do is engineered to ensure your project's success. With every product, you know you are getting the quality, value, service and on-time delivery that we have built our reputation on for the past 60 years.

From straps and ties to joist hangers and much more, Simpson Strong-Tie® structural connectors increase the strength and safety of timber-frame structures. Each connector is unique to Simpson Strong-Tie and is designed for specific applications without the need to adapt metal plating to suit a connection. Download the Timber Construction Connectors Catalogue.