Simpson: CPT Concealed Post Base Tie

Available Sizes  (mm)

90 X 90
115 X 115
140 X 140

SKU: CPT90Z CPT115Z CPT140Z Categories: ,


The CPT Concealed Post Base provides a clean look to expose the natural beauty of the timber.

Reduce the potential of timber decay at the post end with a 25 mm standoff.

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

  • CPTZ – Carbon Steel; CPTSS – 316 Stainless Steel
  • 2.7mm thick (base), 3.5mm thick (knife plate)
  • ZMAX® Galvanised: CPTZ
Features & Benefits
  • Manufactured in heavier gauge steel for a stronger connection
  • The post support blade can be used as a template for location to drill dowel holes
  • Black powder coated base for a modern appearance
  • Tested and load-rated engineering data available
  • Suitable for Glulam and solid sawn timber
  • It can be installed with either mechanical or chemical anchors (dependant on engineering specifications)
  • Available in a range of sizes to suit 90mm, 115mm, 140mm and 190mm posts
  • The 90 mm size is also available in 316 Stainless Steel for for more corrosive environments such as coastal areas
  • All pins and fasteners needed for installation are included
  • Use all specified fasteners
  • Post bases do not provide adequate resistance to prevent members from rotating about the base and therefore are not recommended for non‑braced or non‑top‑supported installations
  • Anchorage Options:
  • The holes in the CPT tabs are sized for 12mm diameter anchors
  • For cast‑in‑place anchors, there should be 22mm (±3mm) of anchor above the top surface of the concrete
Source credit: Simpson Strong-Tie 

Additional information

Size (mm) / Qty

90 X 90 / 1
115 X 115 / 1
140 X 140 / 1

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