The Simpson ABA66Z ABA ZMAX Galvanized Adjustable Standoff Post Base for 6x6 is built by Simpson to attach nominal 6x6 wooden posts securely to existing concrete slabs or footings. Constructed from 14-gauge steel with a ZMAX galvanized finish, this adjustable post base provides a reliable, code-compliant structural connection for decks, pergolas, patios, basement columns, and other exterior or weather-exposed post applications. The built-in 1 in. standoff keeps wood elevated above the concrete surface to help prevent rot, while the slotted anchor hole makes precise post positioning straightforward - delivering a cost-effective solution where structural performance and corrosion resistance both matter.

Key Features

• Slotted anchor hole in the base - allows flexibility around the anchor bolt so you can fine-tune post placement during installation rather than being locked into a fixed position
• 1 in. 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 handle elevated loads from earthquake or wind events, adding structural confidence to exterior and below-grade post connections
• 14-gauge steel construction - delivers the strength and rigidity needed for demanding structural post applications without excessive bulk
• ZMAX galvanized coating - provides extra corrosion resistance specifically suited to exterior environments and direct contact with pressure-treated lumber, where standard galvanization may fall short
• Compatible with nails or Strong-Drive SD Connector screws - installs with (8) 0.162 x 3-1/2 in. nails or (8) #10 x 1 1/2 Strong-Drive SD Connector screws, giving installers flexibility to use the fastener type that best fits the job

Why This Product

• Adjustability built into the base - the slotted anchor hole accommodates real-world anchor bolt placement variations, reducing the frustration of rigid positioning and making field installation more forgiving on concrete decks, patios, and footings
• Rot prevention and code compliance in one - the 1 in. standoff does double duty by physically protecting the post end from moisture contact and satisfying code requirements for exposed or basement installations, so there is no need to source a separate standoff solution
• ZMAX finish rated for treated wood and exterior use - standard galvanized hardware can corrode quickly when paired with modern pressure-treated lumber; the ZMAX coating is specifically designed to hold up in these conditions, extending the service life of the connection
• Wind and seismic uplift resistance - the increased uplift load rating makes this post base a practical choice for structures in regions prone to high winds or seismic activity, where a basic post base may not provide adequate holding power

Specifications

• Model Number: ABA66Z
• Nominal Post Size: 6x6
• Gauge: 14
• Width: 5-1/2 in.
• Height: 3-1/8 in.
• Length: 5-3/8 in.
• Coating/Finish: ZMAX
• Standoff Height: 1 in.
• Country of Origin: United States

Approved Applications

• Attaching wooden posts to existing concrete slabs or footings
• Structural posts installed in basements or areas exposed to weather or water splash
• Exterior post applications requiring enhanced corrosion resistance
• Installations involving treated wood where ZMAX coating is recommended
• Structures requiring increased uplift resistance for earthquake or wind loading

Install With (sold separately)

• Install with (8) 0.162 x 3-1/2 in. nails or (8) #10 x 1-1/2 Strong-Drive SD Connector screws (Model: SD10112)
• Requires (1) 5/8 in. concrete anchor (not included)

Frequently Asked Questions

What size post is the ABA66Z designed to fit?

The ABA66Z is designed for a nominal 6x6 post size, providing a secure and properly sized connection between a 6x6 wooden post and a concrete surface.

Why does this post base have a 1 in. standoff?

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

What fasteners should be used to install the ABA66Z?

The ABA66Z should be installed with (8) 0.162 x 3-1/2 in. nails or (8) #10 x 1-1/2 Strong-Drive SD Connector screws (Model: SD10112), along with (1) 5/8 in. concrete anchor to secure the base to the concrete.

Is the ABA66Z suitable for use with pressure-treated lumber?

Yes. The ABA66Z features ZMAX galvanization, which offers extra corrosion resistance specifically designed for exterior and treated-wood applications, making it compatible with pressure-treated lumber commonly used in outdoor structural builds.

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