Simpson Strong-Tie CPT88Z CPTZ™ ZMAX® Galvanized Concealed Post Base for 8x8
Simpson Strong-Tie® CPTZ Concealed Post Base for 8x8 Posts – ZMAX® Galvanized
The CPTZ post base combines a knife plate with a standoff base to give a clean, concealed connection between a wood post and concrete. With the knife plate hidden inside the post, the hardware stays out of sight while the post is held 1 in. above the concrete.
That 1 in. standoff is code-required when supporting permanent structures that are exposed to weather or water splash, or located in basements. It also reduces the potential for decay at the end of the post or column.
Anchorage is flexible: the CPTZ can be set on cast-in-place anchors or retrofitted to existing concrete with adhesive or mechanical anchors. The post attaches with the supplied 1/2 in. diameter galvanized pins.
This model fits nominal 8x8 posts. The base is 12-gauge steel and the knife plate is 10-gauge steel, both with a ZMAX® galvanized finish that offers extra corrosion resistance for exterior and treated-wood applications.
Key features
- Knife plate and standoff base for a clean, concealed look
- 1 in. standoff height above concrete, code-required for permanent structures exposed to weather or water splash, or in basements
- Standoff reduces the potential for decay at post or column ends
- Anchorage can be cast-in-place or retrofit with adhesive or mechanical anchors
- Nominal post size: 8x8
- Steel gauge: 12-gauge base, 10-gauge knife plate
- ZMAX® galvanization for extra corrosion resistance in exterior and treated-wood applications
Installation
- Install with 1/2 in. anchor bolts (not included) and the supplied 1/2 in. galvanized pins
Simpson Strong-Tie® CPTZ Concealed Post Base for 8x8 Posts – ZMAX® Galvanized
The CPTZ post base combines a knife plate with a standoff base to give a clean, concealed connection between a wood post and concrete. With the knife plate hidden inside the post, the hardware stays out of sight while the post is held 1 in. above the concrete.
That 1 in. standoff is code-required when supporting permanent structures that are exposed to weather or water splash, or located in basements. It also reduces the potential for decay at the end of the post or column.
Anchorage is flexible: the CPTZ can be set on cast-in-place anchors or retrofitted to existing concrete with adhesive or mechanical anchors. The post attaches with the supplied 1/2 in. diameter galvanized pins.
This model fits nominal 8x8 posts. The base is 12-gauge steel and the knife plate is 10-gauge steel, both with a ZMAX® galvanized finish that offers extra corrosion resistance for exterior and treated-wood applications.
Key features
- Knife plate and standoff base for a clean, concealed look
- 1 in. standoff height above concrete, code-required for permanent structures exposed to weather or water splash, or in basements
- Standoff reduces the potential for decay at post or column ends
- Anchorage can be cast-in-place or retrofit with adhesive or mechanical anchors
- Nominal post size: 8x8
- Steel gauge: 12-gauge base, 10-gauge knife plate
- ZMAX® galvanization for extra corrosion resistance in exterior and treated-wood applications
Installation
- Install with 1/2 in. anchor bolts (not included) and the supplied 1/2 in. galvanized pins
https://www.youtube.com/watch?v=WCnmbYS4Emo
| SKU | CPT88Z |
|---|---|
| Brand | Simpson Strong-Tie® |
Shipping & Returns
Shipping:
We offer free standard shipping on all orders over $200 ($975.00 for Simpson StrongTie products). Orders are usually processed within 1–2 business days and delivered within 5–7 business days. Express shipping options are also available at checkout.
Returns:
If you are not completely satisfied with your purchase, you may return your item(s) within 30 days of delivery for a full refund or exchange. Returned items must be in their original condition and packaging.
For more details, please visit our Return Policy page.


