The Simpson ABA46Z ABA ZMAX Adjustable Standoff Post Base is a Simpson Strong-Tie engineered connector built to anchor 4x6 wooden posts securely to existing concrete. Its built-in 1 in. standoff elevates the post end above the concrete surface to help prevent rot, while a slotted anchor hole provides on-site adjustability for precise post alignment. Made from 14-gauge steel with a ZMAX galvanized finish, this post base is engineered for exterior applications, treated-lumber installations, basements, and anywhere structural posts face exposure to weather or water splash - delivering code-compliant performance and a cost-effective connection to the foundation.

Key Features

• Slotted anchor hole in the base - allows flexibility around the anchor bolt so you can fine-tune post placement on site without starting over, saving installation time and frustration.
• Built-in 1 in. standoff design - keeps the post end elevated 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 handle elevated forces from earthquake or wind loading, giving structural post connections the added resistance needed in high-demand applications.
• 14-gauge steel construction - provides a strong, durable base that holds up under the demands of structural post installations without adding unnecessary bulk.
• ZMAX galvanized finish - delivers extra corrosion resistance beyond standard galvanization, making this post base a reliable choice for exterior environments and installations using treated lumber where standard coatings fall short.
• Installs with nails or Strong-Drive SD Connector screws - compatible with 16d common nails or #10 x 1-1/2 Strong-Drive SD screws, giving installers flexibility to work with the fasteners they already have on hand.

Why This Product

• Built-in rot prevention for long-term post integrity - the 1 in. standoff keeps wood off the concrete, addressing one of the most common causes of post failure in exterior and below-grade installations before it starts.
• Adjustability that makes field installation practical - the slotted base accommodates minor anchor bolt variations, reducing the chance of costly alignment errors when attaching posts to an existing concrete foundation.
• ZMAX coating purpose-built for harsh conditions - the heavy galvanized finish is specifically suited for treated-wood contact and exterior exposure, so the connector resists corrosion over the long service life of the structure.
• A single connector that handles multiple code-driven scenarios - whether the installation involves a basement structural post, an exterior deck column, or a site in a high wind or seismic zone, this adjustable post base is engineered to meet those requirements in one cost-effective solution.

Specifications

• Model Number: ABA46Z
• Brand: Simpson Strong-Tie
• Nominal Post Size: 4x6
• Gauge: 14
• Width: 3 9/16 in.
• Height: 3 1/8 in.
• Length: 5 3/16 in.
• Coating/Finish: ZMAX
• Install With: 16d common nails or #10 x 1-1/2 Strong-Drive SD screws (sold separately)
• Required Fasteners: (1) 5/8 in. concrete anchor and (8) 0.162 in. x 3-1/2 in. nails
• Country of Origin: United States

Approved Applications

• Attaching 4x6 wooden posts to existing concrete foundations
• Structural post installations in basements requiring code-compliant standoff clearance
• Exterior post installations exposed to weather or water splash
• Applications requiring increased uplift resistance for earthquake or wind loading
• Installations using treated lumber where enhanced corrosion resistance is required

Frequently Asked Questions

What post size is the ABA46Z designed for?

The ABA46Z is designed for a nominal 4x6 post size, providing a secure and properly fitted connection between the post and the concrete foundation.

Why does this post base have a 1-inch standoff?

The 1-in. standoff design helps prevent rot at the end of the post by keeping it elevated above the concrete surface. It 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 ABA46Z?

The ABA46Z attaches to the post with 16d common nails or #10 x 1-1/2 Strong-Drive SD connector screws. Securing the base to the concrete requires a 5/8 in. concrete anchor.

Why is ZMAX galvanization important for this post base?

ZMAX galvanization provides extra corrosion resistance, making the ABA46Z well suited for exterior applications and use with treated lumber, where standard galvanized finishes may be insufficient to withstand exposure to the elements or chemicals present in treated wood.

Note: Product dimensions may differ from picture. See item description for specifications.