The Simpson Strong-Tie ABA46RZ ABA ZMAX Galvanized Adjustable Standoff Post Base for 4x6 Rough Cut Lumber is engineered by Simpson Strong-Tie to securely attach wooden posts to existing concrete while providing a built-in 1-inch standoff that helps prevent moisture-related rot at the base of the post. Designed exclusively for rough cut 4x6 lumber, this adjustable post base features a slotted anchor hole for flexible positioning and a ZMAX galvanized coating that delivers superior corrosion resistance, making it a reliable and cost-effective solution for both exterior and treated-wood applications.

Key Features

• The slot in the base enables flexibility around the anchor bolt, making precise post placement easier
• The 1-in. standoff design meets code requirements for structural posts installed in basements or exposed to weather or water splash
• Increased uplift loads for earthquake or wind loading
• Nominal post size: Rough 4x6
• Made from 14-gauge steel
• ZMAX galvanization offers extra corrosion resistance for exterior and treated-wood applications
• Attaches to the post with nails or Strong-Drive SD Connector screws for installation versatility
• Designed exclusively for rough cut lumber - the "R" designation ensures a proper fit
• Made in the United States

Specifications

• MPN: ABA46RZ
• Brand: Simpson Strong-Tie
• Member Size: 4x6 rough
• Gauge: 14
• Width (W): 4 1/16 in.
• Height (H): 2 7/8 in.
• Length (L): 5 3/16 in.
• Coating / Finish: ZMAX
• Install With: Install with 16d common nails or #10 x 1-1/2 Strong-Drive SD screws (sold separately)
• Country of Origin: United States

Approved Applications

• Attaching rough cut 4x6 wooden posts to existing concrete foundations
• Structural post installations in basements where code-compliant standoff clearance is required
• Exterior post installations exposed to weather or water splash
• Applications in seismic zones or high-wind regions requiring increased uplift load capacity
• Installations involving treated lumber where enhanced corrosion resistance is necessary

Frequently Asked Questions

What size lumber is the ABA46RZ designed for?

The ABA46RZ is designed exclusively for rough cut 4x6 lumber. The "R" designation in the model number indicates it is intended for rough cut lumber only and is not interchangeable with bases designed for standard dimensional lumber.

Why does the ABA46RZ have a 1-inch standoff?

The 1-in. standoff design keeps the base of the post elevated above the concrete surface, which helps prevent moisture accumulation at the end grain of the post and guards against rot. This standoff also meets code requirements for structural posts installed in basements or in areas exposed to weather or water splash.

What fasteners are required to install the ABA46RZ?

The ABA46RZ is approved to be installed with 16d common nails or #10 x 1-1/2 Strong-Drive SD Connector screws to attach the base to the post. A 5/8-inch concrete anchor is required to secure the base to the concrete. Hot-dip galvanized fasteners meeting the specifications of ASTM A153 are required.

What makes ZMAX galvanization different from standard galvanization?

ZMAX galvanization provides a thicker zinc coating than standard G90 galvanization, offering extra corrosion resistance that is especially important for exterior applications and installations involving treated wood, where contact with preservative chemicals can accelerate the corrosion of standard coatings.

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