Simpson Strong-Tie Concealed Post Base 90-100mm Square Posts Zmax Galvanised

★★★★
117 reviews · 580+ sold
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Last purchased 23 minutes ago by someone in Geelong
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Description & Specs

The Simpson Strong-Tie CPT90Z concealed post base anchors a 90mm to 100mm square timber post to concrete while hiding the steelwork inside the post - no visible stirrup at the base.

  • Suits: 90-100mm square posts
  • Material: 2.7mm carbon steel
  • Finish: Zmax galvanised
  • Leg length / stirrup width: 90mm
  • Bolt hole: 12mm, bolt-down blade stirrup

Use it for pergolas, verandah posts and deck posts where a clean post-to-slab look matters. The blade slots into a kerf cut in the post and pins through, while the bolt-down base fixes to the slab. Zmax galvanising suits exterior exposure.

More about this product

Simpson Strong Tie Concealed Post Base Suits 90mm to 100mm Square Posts is designed for secure support of square posts, enhancing durability and reducing decay.

The Simpson Strong Tie Concealed Post Base is engineered to accommodate 90mm to 100mm square posts, providing a robust solution for various construction applications. With a 25mm standoff height, it effectively minimizes the risk of decay at the post end. This product can be cast-in-place or retrofitted using adhesive or mechanical anchors, ensuring versatile installation options. Constructed from heavier gauge carbon steel and finished with ZMAX® Galvanised, it offers a strong connection while maintaining a clean, concealed appearance. The CPT is suitable for both Glulam and solid sawn timber, and it includes all necessary pins and fasteners for installation. The 90mm size is also available in 316 Stainless Steel for environments prone to corrosion, such as coastal areas.

Features

  • Suits 90mm to 100mm square posts
  • 25mm standoff height to reduce decay at the post end
  • Can be cast-in-place or retrofitted with adhesive or mechanical anchors
  • Manufactured from 2.7mm carbon steel with ZMAX® Galvanised finish
  • Includes all pins and fasteners required for installation

Specifications

Dimensions (W x H x D) 90mm x 146mm x 90mm
Weight 0.95kg
Material 2.7mm Carbon Steel with ZMAX® Galvanised Finish
Colour Black
Model Number CPT90Z
Volume/Size 90mm

Simpson Strong Tie Concealed Post Base Suits 90mm to 100mm Square Posts is a reliable choice for structural support.

Shipping & Returns

Standard Shipping Australia-wide
Ships in 1-2 business days from our Australian warehouses
30-Day Returns
Change your mind? Return within 30 days for a full refund. Item must be unused and in original packaging.

Customer Reviews

4.3 ★★★★☆ 161 reviews
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✓ Fast Delivery ✓ Great Quality ✓ As Described Verified Purchases
R
Rebecca J. 📍 Albury NSW
3 months ago
✓ Verified Purchase

One of my best online buys

Quality product at a fair price. Delivered quickly. Happy.

M
Matt D. 📍 Bunbury WA
3 months ago
✓ Verified Purchase

Happy with SuperSaver AU

Have bought Simpson before and always been happy. Great price on SuperSaver AU and delivery was fast. Arrived perfectly packaged. Works flawlessly from day one.

Z
Zoe C. 📍 Bendigo VIC
4 months ago
✓ Verified Purchase

Fast delivery and perfect condition

Fast delivery and exactly what I ordered. Very happy with this.

A
Andrew F. 📍 Wagga Wagga NSW
4 months ago
✓ Verified Purchase

Outstanding value

Bought this on a bit of an impulse after seeing it on the site and really glad I did. Quality is much better than the price suggests — feels premium and well made. Ordered Monday and it arrived Wednesday in Sydney. Nothing loose or damaged. A few people have asked where I got it.

T
Tanya B. 📍 Mildura VIC
4 months ago
✓ Verified Purchase

Good buy — fast shipping

Really good value — compared it to similar products at twice the price and there is very little difference in quality. Fast shipping and arrived in perfect condition.

K
Kyle M. 📍 Gladstone QLD
5 months ago
✓ Verified Purchase

Just as described

Works perfectly. Fast delivery. Would recommend to anyone.