The Simpson ABU44SS Stainless-Steel Adjustable Post Base for 4x4 is a Simpson Strong-Tie engineered connector built to secure wooden posts to existing concrete in high-capacity structural applications. Its slotted anchor hole allows precise post positioning at installation, while the built-in 1 in. standoff keeps the post end elevated above the concrete surface to help prevent rot. Constructed entirely from stainless steel for high to severe corrosion resistance, this adjustable post base is engineered to deliver maximum uplift performance under earthquake and wind-loading conditions - making it a dependable, cost-effective solution for basements, exterior structures, and weather-exposed installations alike.

Key Features

• Slotted anchor hole in the base - provides flexibility around the anchor bolt so you can fine-tune post placement without being locked into a single position, reducing installation frustration on existing concrete.
• Built-in 1 in. standoff design - keeps the post end off the concrete surface to help prevent rot and meets code requirements for structural posts in basements or areas exposed to weather or water splash.
• Rated for increased uplift loads - engineered to handle earthquake and high-wind loading demands, giving you confidence the connection will perform when lateral and vertical forces are at their highest.
• Stainless steel construction throughout - delivers high to severe corrosion resistance, making this post base appropriate for coastal, wet, or other harsh environments where standard hardware would degrade quickly.
• Dual fastener compatibility - installs with stainless-steel 0.162 in. x 3-1/2 in. nails or 1/2 in. diameter stainless-steel machine bolts, giving installers flexibility to match the fastener type to the job at hand.
• Base gauge 16, strap gauge 12 stainless steel - the heavier strap gauge adds structural backbone right where uplift forces are transferred, balancing strength with practical material use.

Why This Product

• Built for demanding corrosion environments - the all-stainless-steel construction resists high to severe corrosion, so this post base holds up in basements, coastal settings, and outdoor applications where moisture and weather exposure would compromise lesser hardware over time.
• Adjustability that saves time on real job sites - the slotted anchor hole accommodates minor anchor bolt misalignment, letting you achieve precise post placement on existing concrete without costly corrections or rework.
• Rot-prevention and code compliance in one design - the 1 in. standoff is not just a structural feature; it actively addresses code requirements for posts in moisture-prone locations, reducing the risk of inspection delays or long-term wood deterioration.
• Engineered for high-load performance where it matters most - with increased uplift capacity designed for wind and seismic loading, this connector is a reliable choice for structural post anchoring in regions subject to significant lateral or uplift forces.

Specifications

• MPN: ABU44SS
• Brand: Simpson Strong-Tie
• Nominal Post Size: 4x4
• Width: 3 in.
• Length: 3-9/16 in.
• Height: 5-1/2 in.
• Hole Bottom: 1-3/4 in.
• Material: Stainless Steel
• Finish: Stainless Steel
• Gauge: Base 16; Strap 12
• Install With: Stainless-steel 0.162 in. x 3-1/2 in. nails or 1/2 in. diameter stainless-steel machine bolts (sold separately)
• Country of Origin: United States

Frequently Asked Questions

What size post is the ABU44SS designed to fit?

The ABU44SS is designed for a nominal 4x4 post size, providing a secure connection between a wooden post and an existing concrete foundation.

Why does this post base include a 1-in. standoff?

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

What fasteners are needed to install the ABU44SS?

The ABU44SS is installed using stainless-steel 0.162 in. x 3-1/2 in. nails or 1/2 in. diameter stainless-steel machine bolts. Using stainless-steel fasteners ensures compatibility with the corrosion-resistant stainless-steel construction of the connector.

Why is stainless steel the material used for this post base?

Stainless steel provides high to severe corrosion resistance, making the ABU44SS suitable for demanding environments such as coastal areas, basements, and other locations exposed to moisture, weather, or water splash where standard coatings may not offer adequate protection.

Note: Product dimensions may differ from picture.