The Simpson ABW66RZ Adjustable Standoff Post Base is a heavy-duty anchoring solution engineered to securely connect a rough 6x6 post or column to existing hardened concrete. Built for decks, patio covers, and other top-supported structures, this post base combines a 1 in. standoff design with slotted adjustability and ZMAX galvanized construction, giving contractors and builders a reliable, corrosion-resistant option for exterior and pressure-treated lumber applications where long-term performance matters.

Key Features

• Attaches a post to existing concrete for decks, patio covers, and other top-supported structures - no wet concrete pour required, making installation straightforward on already-cured slabs and footings.
• 1 in. standoff from the concrete surface - keeps the post end elevated above moisture that collects on concrete, helping prevent rot and extending the working life of the post.
• Slotted for adjustability - allows fine-tuning of post position around the anchor bolt so you can achieve accurate, plumb placement even when the bolt is not perfectly centered.
• Designed for versatility, cost-effectiveness, and maximum uplift performance - the AB/ABE hybrid design delivers strong wind uplift resistance without the cost of an over-engineered solution, making it a practical choice for a wide range of load conditions.
• ZMAX galvanization - provides extra corrosion resistance compared to standard galvanized coatings, making this base well suited for exterior environments and direct contact with pressure-treated or chemically treated lumber.
• Base gauge 12, strap gauge 14 construction - heavier-gauge steel at the base delivers structural rigidity where load transfer to the concrete is greatest, while the strap retains flexibility for fastening to the post.
• Installs with 10d common nails or #9 x 1-1/2 in. Strong-Drive SD screws - compatible with widely available fasteners, keeping the installation process efficient and straightforward.

Why This Product

• Rot protection built into the design - the 1 in. standoff is not just a construction detail; it directly addresses one of the most common causes of post failure in outdoor structures by preventing the post end from sitting in pooled moisture on the concrete surface.
• ZMAX coating for demanding exterior conditions - where standard galvanized hardware can fall short in humid, wet, or treated-lumber environments, the ZMAX finish provides a thicker, more durable barrier against corrosion, reducing the risk of premature hardware failure.
• Adjustable design saves time on the job - the slotted base accommodates minor anchor bolt misalignment, so installers can correct positioning during installation rather than resetting bolts or repouring footings.
• Purpose-built for rough-cut 6x6 lumber - the ABW66RZ is sized specifically for rough-cut dimensions, eliminating the guesswork and fit issues that can occur when using a base intended for standard dimensional lumber in rough-sawn applications.

Specifications

• Model Number: ABW66RZ
• Member Size: Rough 6x6
• Gauge: Base 12; strap 14
• Coating/Finish: ZMAX
• Width (W): 6 in.
• Height (H): 2-13/16 in.
• Length (L): 6 in.
• 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 deck framing connections
• Patio covers and pergolas
• Other top-supported structures requiring post-to-concrete anchoring
• Exterior applications where corrosion resistance is required
• Installations involving pressure-treated or chemically treated lumber

Frequently Asked Questions

What size post is the ABW66RZ designed for?

The ABW66RZ is designed exclusively for use with rough cut 6x6 lumber. The "R" designation in the model number indicates compatibility with rough-cut lumber dimensions, which are larger than standard dimensional lumber.

Why does the ABW66RZ feature a 1 in. standoff?

The 1 in. standoff raises the base of the post above the concrete surface, which helps prevent direct contact between the post end and moisture that can accumulate on concrete. This design feature helps avoid post-end rot and extends the service life of the post.

What fasteners should be used to install the ABW66RZ?

The ABW66RZ should be installed with 10d common nails or #9 x 1-1/2 in. Strong-Drive SD screws. Because this base features a ZMAX galvanized finish, hot-dip galvanized fasteners meeting ASTM A153 specifications are recommended to maintain corrosion resistance compatibility.

What is ZMAX galvanization and why does it matter for this post base?

ZMAX is a G185 hot-dip galvanized coating that provides a thicker zinc layer than standard galvanization, offering enhanced corrosion resistance. This makes the ABW66RZ particularly well-suited for exterior applications and for use with pressure-treated or chemically treated wood, where standard galvanized hardware may degrade more quickly over time.

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