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CBTZ Concealed Beam Tie

CBTZ

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

Material

  • 12 gauge

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 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
  1. Uplift and lateral loads have been increased for wind or earthquake with no further increase allowed; reduce where other loads govern.
  2. Lateral load is in the direction parallel to the beam.
  3. Alternate 1/2"-diameter hex or square head machine bolts may be used for loads listed.
  4. Lag or carriage bolts are not permitted.
  5. 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.
  6. 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
CBT2Z bottom view
DWG DXF
CBT2Z front view
DWG DXF
CBT2Z left view
DWG DXF
CBT2Z right view
DWG DXF
CBT2Z top view
DWG DXF
CBT2Z
DWG DXF
CBT4Z
CBT4Z bottom view
DWG DXF
CBT4Z front view
DWG DXF
CBT4Z left view
DWG DXF
CBT4Z right view
DWG DXF
CBT4Z top view
DWG DXF
CBT4Z
DWG DXF