The Simpson ABU ZMAX Galvanized Adjustable Standoff Post Base for Rough 4x6 is an engineered connector from Simpson built to anchor wooden posts directly to existing concrete in high-capacity structural applications. Its built-in 1-in. standoff keeps the post end elevated above the concrete surface to help prevent rot, while a slotted anchor hole in the base allows for positional flexibility during installation. Constructed from 12-gauge steel with a ZMAX galvanized finish, this adjustable post base is designed to deliver maximum uplift performance in exterior environments, treated-wood applications, and locations subject to seismic or high-wind loading forces.

Key Features

• Slotted anchor hole for adjustability - the slot enables flexibility around the anchor bolt so you can fine-tune post placement without being locked into a single fixed position, saving time and reducing frustration during concrete anchor installations
• Built-in 1-in. standoff design - keeps the post end elevated off the concrete surface to help prevent moisture-related rot, and meets code requirements for structural posts in basements or areas exposed to weather or water splash
• Increased uplift load capacity - engineered to handle the elevated forces generated by earthquake or wind loading, making this base a reliable choice for seismic zones and high-wind regions
• 12-gauge steel construction - provides the structural strength needed for high-capacity post anchoring applications where performance and durability cannot be compromised
• ZMAX galvanized finish - delivers extra corrosion resistance beyond standard galvanizing, keeping the connector protected in exterior conditions and when paired with treated lumber that can accelerate corrosion in lesser coatings
• Multiple fastener options - compatible with nails, Strong-Drive SD Connector screws, or bolts, giving installers the flexibility to choose the fastening method that best suits the job

Why This Product

• Built-in rot protection for long-term structural integrity - the 1-in. standoff is not just a convenience feature; it actively separates the post end from the concrete surface, reducing the risk of moisture intrusion and wood decay over the life of the structure
• Designed for demanding load environments - with increased uplift capacity engineered specifically for seismic and high-wind applications, this post base is a sound choice where standard connectors may not meet the performance requirements
• ZMAX coating for reliable corrosion resistance in tough conditions - whether the installation is exposed to weather, water splash, or chemically treated wood, the ZMAX galvanized finish provides an added layer of protection that helps the connector hold up over time
• Adjustable design reduces installation headaches - the slotted base hole lets you work with existing anchor bolt positions rather than against them, making precise post placement achievable even when anchor locations are not perfectly centered

Specifications

• MPN: ABU46RZ
• Nominal Post Size: Rough 4x6
• Width: 5 in.
• Length: 4-1/16 in.
• Height: 6-3/4 in.
• Hole Bottom: 2-3/8 in.
• Gauge: 12
• Coating: ZMAX
• Finish: ZMAX
• Install With: Install with 0.162 in. x 3-1/2 in. nails or 1/2 in. machine bolts (sold separately)
• Country of Origin: United States

Frequently Asked Questions

Why does the ABU46RZ have a 1-in. standoff?

The built-in 1-in. standoff is designed to help prevent rot at the end of the wooden post by keeping it elevated above the concrete surface. This design also meets code requirements for structural posts installed in basements or in locations exposed to weather or water splash.

What fasteners are used to install the ABU46RZ?

This post base installs with 0.162 in. x 3-1/2 in. nails or 1/2 in. machine bolts to attach to the post. The slotted anchor hole in the base accommodates an anchor bolt for securing it to concrete.

What makes ZMAX galvanization different from standard galvanization?

ZMAX galvanization provides extra corrosion resistance compared to standard hot-dip galvanizing, making the ABU46RZ well suited for exterior applications and use with treated wood, where standard coatings may degrade more quickly.

Is the ABU46RZ suitable for high-wind or seismic applications?

Yes. The ABU46RZ is designed with increased uplift load capacity, making it appropriate for applications requiring resistance to earthquake or wind loading forces.

Note: Product dimensions may differ from picture.