The Simpson ABU66SS Stainless Steel Adjustable Post Base for 6x6 is a high-capacity structural connector engineered by Simpson to securely attach wooden posts to existing concrete. Built from stainless steel for high and severe corrosion resistance, this post base is purpose-built for demanding environments where moisture, weather exposure, or water splash are ongoing concerns. Its slotted anchor hole and built-in standoff design work together to simplify installation while delivering maximum uplift performance in wind and seismic loading conditions, making it a reliable and cost-effective choice for securing a post to the foundation.

Key Features

• Slotted anchor hole in the base - allows lateral adjustment around the anchor bolt during installation, so precise post placement is easier to achieve without costly repositioning
• Built-in 1 in. standoff - elevates the post end above the concrete surface to help prevent rot and meets code requirements for structural posts installed in basements or areas exposed to weather or water splash
• Stainless steel construction with base gauge 12 and strap gauge 10 - delivers high and severe corrosion resistance, keeping the connector structurally sound in harsh or moisture-heavy environments over the long term
• Optimized for increased uplift loads - engineered to handle elevated forces from earthquake or wind loading, giving builders confidence in high-demand structural applications
• Compatible with multiple fastener types - installs with stainless-steel 0.162 in. x 3-1/2 in. nails, Strong-Drive SD Connector screws, or 1/2 in. diameter stainless-steel machine bolts, offering installation flexibility to match jobsite conditions

Why This Product

• Built for corrosive environments - stainless steel construction provides high and severe corrosion resistance, making this adjustable post base a dependable long-term solution for exterior decks, covered porches, basement columns, and other moisture-exposed structural applications
• Simplifies post alignment on existing concrete - the slotted base design accommodates real-world anchor bolt placement variations, reducing the need for rework and helping contractors and DIYers achieve accurate post positioning the first time
• Meets code requirements with a protective standoff - the 1 in. standoff keeps the post end elevated to prevent rot while satisfying building code requirements for posts in basements and weather-exposed locations, removing a common inspection concern
• Engineered for high-capacity and seismic applications - increased uplift load performance makes this connector a practical choice in regions with elevated wind or earthquake risk, where structural post connections face greater demands

Specifications

• MPN: ABU66SS
• Brand: Simpson Strong-Tie
• Material: Stainless Steel
• Finish: Stainless Steel
• Nominal Post Size: 6x6
• Width: 5 in.
• Length: 5-1/2 in.
• Height: 6-1/16 in.
• Hole Bottom: 1-3/4 in.
• Steel Gauge: Base 12; Strap 10
• Standoff Height: 1 in.
• 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 is the purpose of the 1-inch standoff on the ABU66SS?

The built-in 1-inch standoff is designed to help prevent rot at the end of the wooden 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 ABU66SS?

The ABU66SS should be installed with stainless-steel 0.162 in. x 3-1/2 in. nails or 1/2 in. diameter stainless-steel machine bolts. It can also be attached using Strong-Drive SD Connector screws or bolts.

Why is stainless steel used for the ABU66SS?

Stainless steel provides high and severe corrosion resistance, making the ABU66SS well suited for applications where the connector will be exposed to harsh environmental conditions, moisture, weather, or other corrosive elements.

How does the slotted anchor hole improve installation?

The slot in the base enables flexibility around the anchor bolt, allowing for adjustments during installation and making precise post placement easier without requiring the anchor bolt to be positioned with exact precision in advance.

Note: Product dimensions may differ from picture.