The Simpson Strong-Tie ABU66Z ABU ZMAX Galvanized Adjustable Standoff Post Base is a high-capacity connector engineered to anchor 6x6 wooden posts to existing concrete in demanding structural applications. Its built-in 1-inch standoff keeps the post end elevated above the concrete surface, helping to guard against moisture-driven rot, while a slotted anchor hole in the base makes precise post positioning straightforward even when anchor bolt placement is less than perfect. ZMAX galvanization delivers enhanced corrosion resistance suited to exterior environments and pressure-treated lumber, and the design is built to handle increased uplift loads from earthquake or wind forces - making it a cost-effective, code-compliant choice for decks, porches, covered structures, and basement columns alike.

Key Features

• Slotted anchor hole for adjustability - allows flexibility around the anchor bolt position so you can achieve accurate post placement without the frustration of rigid alignment requirements
• 1-inch standoff design - elevates the post end above the concrete surface to help prevent rot and meets code requirements for structural posts in basements or locations exposed to weather or water splash
• Increased uplift load capacity - engineered to resist the higher forces generated by earthquake or wind loading, adding a critical layer of structural security to your build
• ZMAX galvanized coating - provides extra corrosion resistance beyond standard galvanized finishes, making this post base a reliable long-term solution for exterior installations and use with treated wood
• Multiple fastening options - accepts nails, Strong-Drive SD Connector screws, or bolts, giving you flexibility to fasten the base to the post using the method that best fits your project
• 12-gauge base and 10-gauge strap construction - heavier strap gauge contributes to the uplift performance you need in high-capacity applications without unnecessary bulk

Why This Product

• Built-in rot protection where it matters most - the 1-inch standoff is not just a code checkbox; it actively keeps wood away from concrete moisture, extending the service life of your post and reducing long-term maintenance concerns
• Designed for real-world anchor bolt tolerances - the slotted base hole addresses one of the most common frustrations in post installation: imprecise anchor bolt placement, saving time and avoiding costly corrections in the field
• ZMAX finish for harsh and treated-wood environments - the heavier galvanized coating resists the accelerated corrosion that standard hardware can suffer when exposed to weather or the chemicals present in pressure-treated lumber, making this a smarter fit for exterior structural connections
• Maximum uplift performance for high-stakes loading - whether the concern is seismic activity or high-wind zones, this adjustable post base is specifically engineered to handle increased uplift demands, giving builders and homeowners added confidence in structural integrity

Specifications

• MPN: ABU66Z
• Brand: Simpson Strong-Tie
• Nominal Post Size: 6x6
• Coating / Finish: ZMAX
• Steel Gauge: Base 12; strap 10
• Install With: 0.162 in. x 3-1/2 in. nails or 1/2 in. diameter machine bolts (sold separately)
• Width: 5 in.
• Length: 5-1/2 in.
• Height: 6-1/16 in.
• Hole Bottom: 1-3/4 in.
• Country of Origin: United States

Frequently Asked Questions

What is the purpose of the 1-inch standoff on the ABU66Z?

The built-in 1-inch standoff keeps the end of the wooden post elevated above the concrete surface, helping to prevent moisture absorption and rot. This standoff design also meets code requirements for structural posts installed in basements or in locations exposed to weather or water splash.

What makes the ABU66Z adjustable?

The ABU66Z features a slotted anchor hole in the base that allows flexibility around the anchor bolt. This slot makes it easier to achieve precise post placement even when anchor bolt positioning is not perfectly centered.

What fasteners are used to install the ABU66Z?

The ABU66Z can be installed using 0.162 in. x 3-1/2 in. nails or 1/2 in. diameter machine bolts. Simpson Strong-Tie also notes compatibility with Strong-Drive SD Connector screws or bolts for attaching the base to the post.

Why is ZMAX galvanization important for this post base?

ZMAX galvanization provides an extra layer of corrosion resistance beyond standard galvanized finishes. This makes the ABU66Z particularly well suited for exterior applications and for use with pressure-treated wood, where exposure to moisture and treatment chemicals can accelerate corrosion on standard hardware.

Note: Product dimensions may differ from picture.