The Simpson PB66Z 6x6 ZMAX Galvanized Post Base by Simpson is built to create a strong, lasting connection between a 6x6 post or column and concrete - making it a reliable choice for decks, patio covers, and other top-supported structures. Designed to embed directly into wet concrete after the pour and sit flush with the surface, this post base delivers a clean, professional finish without raised hardware at the base. Heavy 12-gauge steel construction combined with ZMAX galvanization makes it especially well-suited for exterior environments and installations involving treated wood, where moisture and corrosive conditions demand hardware that holds up over time.

Key Features

• Embeds in wet concrete after pour and installs flush with the concrete surface - eliminates raised hardware at the post base for a cleaner finished appearance and a secure, integrated connection.
• Embossment in the seat of the base - gives increased strength at the critical load-transfer point where the post meets the base, improving overall structural performance.
• Stress relief holes under the base - resist tearing during loading, helping the connector maintain integrity under the forces that deck and patio cover posts regularly experience.
• Made from 12-gauge steel - provides a heavy-duty foundation that handles the demands of structural post-to-concrete connections in residential and light commercial applications.
• ZMAX galvanization - offers extra corrosion resistance for exterior and treated-wood applications, keeping the connector performing reliably in wet, outdoor, or chemically active environments.
• Sized for nominal 6x6 posts - ensures a proper, snug fit for 6x6 columns and posts without shimming or modification, simplifying installation.

Why This Product

• Built for outdoor exposure where standard hardware falls short - ZMAX galvanization offers extra corrosion resistance specifically for exterior and treated-wood applications, so this post base is designed from the start to handle the conditions that cause ordinary galvanized hardware to degrade prematurely.
• Engineered for structural integrity under real-world loading - the combination of a reinforced embossed seat and stress relief holes means the base resists both concentrated load at the post contact point and tearing forces during loading, giving builders confidence in long-term performance.
• Simplifies concrete pours with a flush-mount design - because the base embeds in wet concrete and sits flush with the surface, contractors can set it during the pour rather than drilling and anchoring into hardened concrete, reducing labor steps on deck and patio cover projects.
• A trusted connection solution from Simpson for top-supported post structures - the PB series is purpose-designed for decks, patio covers, and similar applications where a reliable post-to-concrete base is a critical structural element, not an afterthought.

Specifications

• MPN: PB66Z
• Member Size: 6x6
• Gauge: 12
• Coating: ZMAX
• Finish: ZMAX
• Install With: Install with 16d common nails or 1/2 in. diameter bolts (sold separately)
• Width: 5-1/2 in.
• Length: 5-1/4 in.
• Country of Origin: United States

Approved Applications

• Deck post-to-concrete connections
• Patio cover column bases
• Other top-supported structural post installations
• Exterior applications requiring enhanced corrosion resistance
• Installations involving treated wood in contact with or near concrete

Frequently Asked Questions

What type of concrete installation is the PB66Z designed for?

The PB66Z is designed to embed in wet concrete after the pour and is made to install flush with the concrete surface, creating a clean and secure connection at the base of a 6x6 post or column.

Why is ZMAX galvanization important for this post base?

ZMAX galvanization offers extra corrosion resistance for exterior and treated-wood applications, making the PB66Z especially well-suited for outdoor environments such as decks and patio covers where moisture and treated lumber can accelerate corrosion in standard hardware.

What fasteners are used to install the PB66Z?

The PB66Z is installed with 16d common nails or 1/2 in. diameter bolts, providing flexible fastening options depending on the specific requirements of your project.

Is the PB66Z suitable for non-top-supported structures like fences or unbraced carports?

No. Post bases in the PB series do not provide adequate resistance to prevent members from rotating about the base, and therefore are not recommended for non-top-supported installations such as fences or unbraced carports. The PB66Z is intended for top-supported structures such as decks and patio covers.

Note: Product dimensions and/or screw or bolt holes may differ from picture. Please see item description for specifications.