Product Description
The Simpson CPT88Z CPTZ ZMAX Galvanized Concealed Post Base for 8x8 by Simpson Strong-Tie is a high-performance post base engineered for 8x8 nominal posts and columns requiring a clean, concealed appearance with structural integrity. The CPTZ incorporates a knife plate with a standoff base, achieving a concealed look while providing a code-compliant 1 in. standoff height above concrete. ZMAX galvanization delivers superior corrosion resistance, making this connector ideal for exterior and treated-wood applications.
Key Features
- The 1 in. standoff height is code-required when supporting permanent structures that are exposed to weather or water splash, or in basements
- The standoff reduces the potential for decay at post or column ends
- The anchorage for the CPTZ can be either cast-in-place or retrofit with adhesive or mechanical anchors
- Nominal post size: 8x8
- Base: 12 ga.; knife plate: 10 ga.
- ZMAX galvanization offers extra corrosion resistance for exterior and treated-wood applications
- Installed with 1/2 in. diameter galvanized pins (supplied)
- Made in the United States
Specifications
- MPN: CPT88Z
- Brand: Simpson Strong-Tie
- Nominal/Rough Post Size: 8x8
- Coating / Finish: ZMAX
- Gauge: Base 12 ga.; Knife Plate 10 ga.
- Standoff Height: 1 in.
- Installation Hardware: Install with 1/2 in. anchor bolts and supplied dowels
- Width: 7-1/4 in.
- Length: 7-1/4 in.
- Country of Origin: United States
Approved Applications
- Permanent structures exposed to weather or water splash requiring a code-compliant 1 in. standoff
- Basement post or column installations requiring standoff above concrete
- Exterior applications where corrosion resistance is essential
- Treated-wood post and column connections
- Cast-in-place concrete anchorage installations
- Retrofit installations using adhesive or mechanical anchors
What's Included
Each pack contains (1) CPT88Z Concealed Post Base, CPTZ concealed post base assembly (knife plate and standoff base), 1/2 in. diameter galvanized drift dowels/pins.
Downloads and Resources
Frequently Asked Questions
- Why is the 1 in. standoff height important on the CPT88Z?
- The 1 in. standoff height is code-required when supporting permanent structures that are exposed to weather or water splash, or in basements. It also reduces the potential for decay at post or column ends by keeping the wood elevated above the concrete surface.
- What gauge steel is used in the CPT88Z construction?
- The base is constructed from 12 ga. steel, while the knife plate is made from heavier 10 ga. steel, providing strength at the critical connection point where the post meets the base.
- What anchorage methods are compatible with the CPTZ post base?
- The anchorage for the CPTZ can be either cast-in-place or retrofit with adhesive or mechanical anchors, offering flexibility for both new construction and retrofit projects. Installation requires 1/2 in. anchor bolts.
- Why is ZMAX galvanization specified for this post base?
- ZMAX galvanization offers extra corrosion resistance compared to standard galvanized coatings, making the CPT88Z particularly well-suited for exterior applications and installations involving treated wood, where contact with chemicals and moisture can accelerate corrosion.
Related Products
Note: Product dimensions and/or Screw or Bolt holes may differ from picture.
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