The Simpson Strong-Tie ABA24-2Z ABA ZMAX Galvanized Adjustable Standoff Post Base for Double 2x4 is engineered by Simpson Strong-Tie to securely attach double 2x4 wooden posts to existing concrete foundations. Featuring a built-in 1-inch standoff and ZMAX galvanized coating for superior corrosion resistance, this post base delivers a cost-effective, code-compliant solution for both interior and exterior structural post installations.

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: Double 2x4
• Made from 16-gauge steel
• ZMAX galvanization offers extra corrosion resistance for exterior and treated-wood applications

Specifications

• Model Number: ABA24-2Z
• Member Size: Double 2x4
• Gauge: 16
• Width: 3-1/8 in.
• Length: 3-3/8 in.
• Height: 3-1/8 in.
• Coating: ZMAX
• Finish: ZMAX
• Country of Origin: United States
• Install With: (6) #9 x 2-1/2 in. Strong-Drive SD screws or (6) 0.148 in. x 3 in. nails AND (1) 1/2 in. anchor bolt with (1) 1/2 in. washer

Frequently Asked Questions

Why does the ABA24-2Z include a 1-inch standoff?

The 1-in. standoff design meets code requirements for structural posts installed in basements or exposed to weather or water splash. By keeping the end of the post elevated above the concrete surface, the standoff helps prevent moisture contact that can lead to rot over time.

What hardware is needed to install the ABA24-2Z?

Installation requires either (6) #9 x 2-1/2 in. Strong-Drive SD screws or (6) 0.148 in. x 3 in. nails to attach to the post, plus (1) 1/2 in. anchor bolt and (1) 1/2 in. washer to secure the base to the concrete. Fasteners are not included with the post base.

What is ZMAX galvanization and why does it matter?

ZMAX galvanization is a heavy-duty zinc coating applied to the steel that offers extra corrosion resistance compared to standard galvanized finishes. This makes the ABA24-2Z especially well suited for exterior applications and use with pressure-treated lumber, where standard connectors may be more susceptible to corrosive degradation.

Does the slotted anchor hole affect the strength of the post base?

The slot in the base is specifically designed to enable flexibility around the anchor bolt, making precise post placement easier without compromising the structural performance of the connector. The ABA24-2Z is also engineered to handle increased uplift loads associated with earthquake or wind loading conditions.

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