The Simpson PB66 6x6 Galvanized Post Base is a structural connector engineered by Simpson to anchor the base of a 6x6 post or column directly to concrete, delivering a secure and lasting connection for decks, patio covers, pergolas, and other top-supported structures. Built from 12-gauge steel with a G90 zinc galvanized finish, this non-standoff post base embeds flush into wet concrete and is designed to handle the real-world demands of outdoor construction with dependable corrosion resistance and proven structural integrity.

Key Features

• Embeds in wet concrete after pour and installs flush with the concrete surface - allows for a clean, level installation that keeps the post base properly positioned and eliminates raised hardware above the slab
• Embossment in the seat of the base - gives increased strength at the critical point of contact between the base and the post, improving load transfer and overall connection performance
• Stress relief holes under the base - resist tearing during loading, helping the connector maintain its integrity under the stress and movement that outdoor structures experience over time
• Made from 12-gauge steel - provides a sturdy, heavy-duty foundation for 6x6 post connections in structural applications such as decks and patio covers
• Galvanized G90 zinc coating - delivers extra corrosion resistance, making this post base well-suited for outdoor environments and compatible with treated lumber commonly used in deck and pergola construction

Why This Product

• Built-in strength where it counts - the embossment in the seat and stress relief holes under the base work together to give this connector added structural capacity and resistance to tearing, so it performs reliably under the loads typical of decks, patio covers, and column-supported structures
• Engineered for a flush, professional installation - because the base embeds in wet concrete and sits flush with the surface, there is no raised hardware to work around, resulting in a cleaner finished appearance and a more stable post-to-concrete connection
• Corrosion resistance designed for outdoor use - the G90 zinc galvanized finish goes beyond basic protection, making this post base a practical choice for exposed exterior applications where moisture, weather, and treated wood can accelerate corrosion on lesser hardware
• A trusted name in structural connectors - Simpson has a long-standing reputation for engineering connectors to precise structural standards, and the PB66 reflects that commitment with domestic manufacturing and materials specified for deck and patio construction applications

Specifications

• MPN: PB66
• Member Size: 6x6
• Gauge: 12
• Coating/Finish: Zinc Galvanized, G90
• 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

• Decks requiring secure post-to-concrete connections
• Patio covers and pergolas supported from above
• Other top-supported structures requiring post or column bases

Frequently Asked Questions

When should the PB66 be installed relative to the concrete pour?

The PB66 embeds in wet concrete after the pour and is made to install flush with the concrete surface, so it must be set while the concrete is still wet.

What fasteners are used to attach the post to the PB66 base?

The PB66 is installed with 16d common nails or 1/2 in. diameter bolts to secure the 6x6 post to the base.

What makes the PB66 suitable for outdoor and treated-wood applications?

The PB66 features a G90 zinc galvanized coating, which provides extra corrosion resistance, making it well-suited for outdoor environments and use with treated lumber.

What structural features give the PB66 added strength and durability?

The base includes an embossment in the seat that gives increased strength, and stress relief holes located under the base that resist tearing during loading, both of which contribute to the overall structural performance of the connector.

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