The Simpson CB66SS Stainless Steel Column Base is engineered by Simpson to connect 6x6 posts to concrete foundations across a wide range of lumber, glulam, and engineered wood product sizes. Designed for cast-in-place or wet-set installation, the base plate sits flush with the concrete surface to deliver full post bearing and maximum load transfer. Built from 7-gauge stainless steel, this column base provides high and severe corrosion resistance, making it a dependable solution for structural columns that require strong uplift performance and long-term durability in demanding exposure conditions.

Key Features

• Stainless steel construction at 7-gauge thickness - provides high and severe corrosion resistance, keeping the connection structurally sound in harsh or coastal environments where standard finishes would deteriorate.
• Flush base plate design for cast-in-place or wet-set installation - the bottom of the base plate sits flush with the concrete surface, ensuring full post bearing and a clean, stable foundation connection.
• Increased uplift resistance for wind or seismic loading - engineered to handle lateral and uplift forces, giving you confidence in high-wind and seismic-zone applications where connection integrity is critical.
• Bolt hole locations meet code-required spacing for optimal capacity - hole placement is designed to satisfy code requirements, helping projects move through inspection without the guesswork of custom drilling.
• Compatible with lumber, glulam, and engineered wood products in a 6x6 nominal size - broad material compatibility means this post base works across a variety of structural column types on the same project.

Why This Product

• Built for severe corrosion environments - the stainless steel material and finish are rated for high and severe corrosion exposure, making this column base the right choice for outdoor, coastal, or chemically aggressive settings where a standard galvanized connector would fall short.
• Engineered for structural confidence under wind and seismic loads - the increased uplift resistance built into this post base addresses the real-world demands of wind uplift and seismic loading, providing a connection that performs when conditions are at their worst.
• Simplified, code-compliant installation - the cast-in-place or wet-set installation method, combined with pre-positioned bolt holes that meet code-required spacing, reduces on-site decision-making and supports a straightforward path to code approval.
• Made in the United States by a trusted structural connector brand - Simpson designs this column base to high structural value standards, giving contractors and builders a reliable, purpose-built connector for demanding post-to-foundation applications.

Specifications

• Manufacturer: Simpson Strong-Tie
• MPN: CB66SS
• Nominal Column Size: 6x6
• Width 1: 5-1/2 in.
• Width 2: 5-1/2 in.
• Material: Stainless Steel
• Finish: Stainless Steel
• Gauge: 7-gauge
• Corrosion Resistance: High/Severe
• Country of Origin: United States

Approved Applications

• Connecting 6x6 posts to concrete foundations
• Compatible with lumber, glulam, and engineered wood products
• Cast-in-place concrete installation
• Wet-set concrete installation with base plate flush to concrete surface
• Columns subject to wind or seismic uplift loading
• High and severe corrosion exposure environments

What's Included / Install With:

• Simpson Strong-Tie CB66SS stainless-steel column base (1 unit)
• Install with: (2) 5/8-in. diameter stainless-steel machine bolts (not included)

Options

• Contact us for Configurable Options and Special orders

Note: Product dimensions and/or screw or bolt holes may differ from picture. Please see item description for specifications.

Frequently Asked Questions

What post size is the CB66SS designed for?

The CB66SS is sized for a nominal 6x6 post. It is compatible with lumber, glulam, and engineered wood products of that dimension.

How is the CB66SS installed into concrete?

The CB66SS is designed for either cast-in-place or wet-set installation into concrete. In both methods, the bottom of the base plate sits flush with the concrete surface to provide full post bearing.

Why is stainless steel used for this column base?

The CB66SS is made from 7-gauge stainless steel to provide high and severe corrosion resistance, making it suitable for exposure environments where standard steel would be vulnerable to corrosion.

What hardware is needed to install the CB66SS?

Installation requires two 5/8-in. diameter stainless-steel machine bolts. The bolt hole locations are positioned to meet code-required spacing for optimal load capacity.