The Simpson PB44Z 4x4 ZMAX Galvanized Non-Standoff Post Base is a structural connector from Simpson built to anchor the base of 4x4 posts and columns directly to concrete foundations. Suited for decks, patio covers, and other top-supported structures, this post base embeds into wet concrete for a flush, clean installation at grade level. Its 12-gauge steel construction and ZMAX galvanized finish make it a dependable choice for exterior environments and applications involving pressure-treated lumber, where long-term corrosion resistance is essential.

Key Features

• Embeds in wet concrete after pour and is made to install flush with the concrete surface - allows for a level, professional-looking post connection without raised hardware above the slab
• Embossment in the seat of the base gives increased strength - adds structural rigidity at the critical contact point between post and base, supporting heavier loads with confidence
• Stress relief holes under the base resist tearing during loading - helps the connector handle dynamic and lateral forces without compromising the integrity of the steel
• Made from 12-gauge steel - provides heavy-duty strength appropriate for structural post and column connections in residential and light commercial construction
• ZMAX galvanization offers extra corrosion resistance for exterior and treated-wood applications - outperforms standard galvanized coatings in wet, outdoor, and chemically exposed conditions, extending the service life of the connection
• Installs with 16d common nails - uses a common, widely available fastener type so the post can be secured quickly once the concrete has cured

Why This Product

• Built for real outdoor conditions - the ZMAX galvanized coating is specifically formulated to resist the corrosive chemicals found in pressure-treated lumber and outdoor environments, making this post base a more durable long-term choice for deck footings and patio cover column connections than standard-coated alternatives
• Engineered details that improve structural performance - the embossed seat and stress relief holes are purpose-designed features, not afterthoughts, giving this connector added strength and tear resistance under the kinds of loads typical of top-supported post installations
• Flush concrete installation keeps the finished project looking clean - because the base is designed to set flush with the concrete surface after embedding in the wet pour, there is no raised plate or protruding hardware to work around when finishing the surrounding area
• Domestic manufacturing and a trusted structural connector brand - produced by Simpson, a widely recognized name in structural connectors, this post base is made in the United States and designed to meet the demands of deck, patio, and column base applications where a reliable, code-friendly connection matters

Specifications

• MPN: PB44Z
• Member Size: 4x4
• Gauge: 12
• Coating: ZMAX
• Finish: ZMAX
• Install With: 16d common nails (sold separately)
• Width: 3-9/16 in.
• Length: 3-1/4 in.
• Country of Origin: United States

Approved Applications

• Deck post bases and column footings
• Patio cover post connections
• Other top-supported structural post installations
• Exterior applications requiring enhanced corrosion resistance
• Installations involving pressure-treated lumber

Frequently Asked Questions

What size post is the PB44Z designed to fit?

The PB44Z is designed for a nominal 4x4 post size, securing 4x4 posts or columns to a concrete foundation.

How is the PB44Z installed into concrete?

The PB44Z embeds in wet concrete after the pour and is made to install flush with the concrete surface, allowing for a clean, level connection at the base of the post.

Why choose ZMAX galvanization over standard galvanization?

ZMAX galvanization offers extra corrosion resistance compared to standard coatings, making the PB44Z especially suited for exterior environments and applications involving pressure-treated or treated wood where contact with corrosive chemicals is a concern.

What fasteners are used to attach the post to the PB44Z base?

The PB44Z is installed with 16d common nails to secure the post within the base once the concrete has set.

Note: Post bases do not provide adequate resistance to prevent members from rotating about the base and therefore are not recommended for non-top-supported installations. A minimum sidecover is required to obtain the full load. Product dimensions and/or screw or bolt holes may differ from picture.