The Simpson ABW46RZ Adjustable Post Base for Rough 4x6 Lumber is a heavy-duty anchoring solution from Simpson engineered to securely attach the base of a post or column to existing hardened concrete. Ideal for decks, patio covers, pergolas, and other top-supported structures, this post base pairs a heavy-gauge steel construction with a ZMAX galvanized finish and a built-in 1 in. standoff to deliver reliable performance in exterior and pressure-treated wood applications where moisture resistance and long-term durability matter most.

Key Features

• Attaches a post to existing concrete for decks, patio covers, and other top-supported structures - anchors your post directly to hardened concrete, providing a stable, code-ready foundation for outdoor structural projects.
• 1 in. standoff design - elevates the post end above the concrete surface to reduce moisture contact and help prevent rot, extending the service life of the post in exposed outdoor conditions.
• Slotted for adjustability around the anchor bolt - allows for fine-tuned post placement during installation, making it easier to achieve precise alignment without starting over.
• ZMAX galvanized finish - provides a heavy-duty corrosion-resistant coating suited for exterior environments and direct contact with pressure-treated lumber, helping the hardware hold up over time without premature degradation.
• Dual-gauge steel construction - base 12, strap 16 - combines a thicker base for load-bearing strength with a lighter strap for secure post wrapping, balancing rigidity and wind uplift performance where it counts.
• Designed for versatility, cost-effectiveness, and maximum uplift performance - the AB/ABE hybrid design addresses multiple structural demands in a single connector, reducing the need for additional hardware on qualifying applications.
• Installs with 10d common nails or #9 x 1-1/2 in. Strong-Drive SD screws - compatible with widely available fastener options, giving installers flexibility to work with the tools and materials already on hand.

Why This Product

• Built-in rot protection you can count on - the 1 in. standoff keeps the post end off the concrete, directly addressing one of the most common causes of premature post failure in exterior and ground-level installations.
• ZMAX coating purpose-built for tough exterior conditions - unlike standard galvanized finishes, the ZMAX coating is specifically engineered for use with treated lumber and outdoor exposure, making this base a practical choice for decks, patio covers, and pergolas where hardware corrosion is a real concern.
• Adjustability that simplifies installation - the slotted design allows the post base to shift around the anchor bolt for optimum positioning, reducing costly corrections and saving time during concrete-to-post anchoring on real job sites.
• A single connector that handles versatility, uplift, and value - the AB/ABE hybrid design means this post base is engineered for maximum uplift performance without sacrificing cost-effectiveness, making it a smart pick for structural outdoor framing projects where both performance and budget matter.

Specifications

• Model Number: ABW46RZ
• Member Size: Rough 4x6
• Gauge: Base 12; strap 16
• Width (W): 4 in.
• Height (H): 2-13/16 in.
• Length (L): 6 in.
• Coating/Finish: ZMAX
• Install With: 10d common nails or #9 x 1-1/2 in. Strong-Drive SD screws (sold separately)
• Country of Origin: United States

Approved Applications

• Decks and outdoor deck framing
• Patio covers and pergolas
• Other top-supported structures requiring post-to-concrete anchoring
• Exterior and pressure-treated wood construction

Frequently Asked Questions

What size lumber is the ABW46RZ designed for?

The ABW46RZ is designed exclusively for use with rough cut 4x6 lumber. The "R" designation in the model number indicates it is made specifically for rough-cut member sizes, not standard dimensional lumber.

What fasteners should be used to install the ABW46RZ?

This post base is approved for installation with 10d common nails or #9 x 1-1/2 in. Strong-Drive SD connector screws. Because of the ZMAX coating, hot-dip galvanized fasteners meeting ASTM A153 specifications are required.

Why does the ABW46RZ feature a 1 in. standoff?

The 1 in. standoff elevates the base of the post above the concrete surface, helping to prevent moisture from collecting at the post end. This design feature significantly reduces the risk of rot and extends the service life of the post in exterior applications.

What makes the ZMAX finish suitable for exterior and treated-wood use?

The ZMAX galvanization provides a heavy-duty G185 galvanized coating that delivers extra corrosion resistance compared to standard galvanized finishes. This makes the ABW46RZ well-suited for outdoor environments and direct contact with pressure-treated lumber, which can accelerate corrosion in standard hardware.

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