Simpson 6 x 8 Column Base G90 Galvanized CB68 is a heavy-duty post base engineered by Simpson to connect posts to concrete foundations across a wide range of lumber, glulam, and engineered wood product sizes. Designed for either cast-in-place or wet-set installation, the base plate sits flush with the concrete surface to provide full post bearing - making it a reliable anchor solution for structural columns in demanding load conditions. Built from 7-gauge steel with a G90 galvanized finish, this column base delivers the high structural values and rugged performance required for residential and commercial construction alike.

Key Features

• Increased uplift resistance for wind or seismic loading - keeps your column anchored under the lateral and uplift forces that matter most in high-wind or earthquake-prone regions.
• Bolt hole locations meet code-required spacing for optimal capacity - takes the guesswork out of compliance, ensuring the connection performs at rated load values right out of the box.
• Cast-in-place or wet-set installation - gives contractors flexibility on the job site while ensuring the base plate sits flush with the concrete for full post bearing.
• Made from 7-gauge steel - provides the thickness and rigidity needed to handle high structural loads without deforming under stress.
• G90 galvanized finish - delivers extra corrosion resistance, extending the service life of the connector in exposed or moisture-prone environments.

Why This Product

• Engineered for structural confidence - the CB68 is purpose-built for columns that require high structural values, making it a dependable choice for load-bearing applications where failure is not an option.
• Wind and seismic ready - increased uplift resistance combined with code-compliant bolt hole spacing means this column base is suited for projects in regions with strict wind or seismic design requirements.
• Versatile material compatibility - works with standard lumber, glulam, and engineered wood products, giving builders and engineers the freedom to use it across a variety of structural column configurations.
• Corrosion-resistant construction for long-term durability - the G90 galvanized coating provides a meaningful layer of protection against rust and degradation, reducing maintenance concerns over the life of the structure.

Specifications

• Manufacturer: Simpson Strong-Tie
• MPN: CB68
• Nominal Column Size: 6x8
• Width 1: 5-1/2 in.
• Width 2: 7-1/2 in.
• Gauge: 7
• Coating/Finish: Zinc Galvanized, G90
• Install With: (2) 5/8-in. diameter machine bolts (sold separately)
• Country of Origin: United States

Options

• Contact us for Configurable Options and Special orders

Frequently Asked Questions

What post size is the CB68 compatible with?

The CB68 is designed for a nominal 6x8 column size and is compatible with lumber, glulam, and engineered wood products of that dimension.

How is the CB68 installed into concrete?

The CB68 can be installed either cast-in-place or wet set into the concrete. In both methods, the bottom of the base plate sits flush with the concrete surface to ensure full post bearing.

What fasteners are required to install the CB68?

Installation requires (2) 5/8-in. diameter machine bolts to secure the column base.

What makes the CB68 suitable for wind and seismic applications?

The CB68 features increased uplift resistance specifically designed for wind or seismic loading conditions, and its bolt hole locations meet code-required spacing for optimal load capacity.

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