The Simpson 8 x 12 Column Base CB812 is an engineered structural connector from Simpson built to securely anchor 8 x 12 posts and columns to concrete foundations. Designed for use with lumber, glulam, and engineered wood products, this column base installs using either a cast-in-place or wet-set method, positioning the base plate flush with the concrete surface for full post bearing. Finished in Simpson gray paint for durability, the CB812 delivers the structural capacity demanded by high-load column applications, including those in wind-prone or seismic zones requiring dependable uplift resistance.

Key Features

• Engineered for 8 x 12 column applications - provides a precisely sized, secure connection for lumber, glulam, and engineered wood product columns in structural framing systems.
• Cast-in-place or wet-set concrete installation - gives contractors installation flexibility while ensuring the base plate sits flush with the concrete surface for consistent, full post bearing.
• Designed for high-load structural applications - supports demanding column installations where elevated capacity, wind uplift resistance, or seismic performance is required.
• Simpson gray paint finish - provides a protective coating suited to structural connector applications in both interior and exposed framing environments.
• Requires two 5/8 in. bolts for installation - uses a straightforward, bolt-secured connection method that keeps the installation process direct and verifiable in the field.

Why This Product

• Purpose-built for 8 x 12 post connections - rather than a generic connector, this base is specifically engineered for 8 x 12 column dimensions, meaning the fit, bearing, and load path are all optimized for that application from the start.
• Handles demanding structural conditions - approved for high-load column applications as well as installations in wind-prone and seismic zones, making it a reliable choice for projects where structural performance cannot be compromised.
• Versatile material compatibility - supports lumber, glulam, and engineered wood product columns, giving designers and builders the flexibility to work with a range of structural materials under a single, trusted connector solution.
• American-made quality from a trusted connector brand - produced in the United States by Simpson, a brand widely specified in structural framing, delivering the consistency and engineering rigor that demanding column installations require.

Specifications

• Manufacturer: Simpson Strong-Tie
• Model / MPN: CB812
• Nominal Column Size: 8 x 12
• Fasteners Required: Bolts - (2) 5/8" (sold separately)
• Finish: Simpson Strong-Tie Gray Paint
• Width 1: 7-1/2 in.
• Width 2: 11-1/2 in.
• Country of Origin: United States

Approved Applications

• Connecting posts to concrete foundations in structural framing systems
• Support of lumber, glulam, and engineered wood product columns
• High-load column applications requiring elevated structural capacity
• Installations in wind-prone or seismic zones requiring increased uplift resistance
• Cast-in-place or wet-set concrete foundation connections

What's Included

• 1 x Simpson Strong-Tie CB812 Column Base
• Note: (2) 5/8" bolts are required for installation and are 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 column size is the CB812 designed for?

The CB812 is specifically designed for 8 x 12 column applications, accommodating lumber, glulam, and engineered wood product sizes in that dimension.

How is the CB812 installed?

The CB812 is installed using either a cast-in-place or wet-set method into concrete. The base plate sits flush with the concrete surface, ensuring full post bearing at the bottom of the column.

What fasteners are required to use the CB812?

The CB812 requires bolts - specifically two 5/8" bolts. The bolt hole locations are designed to meet code-required spacing for optimal load capacity.

Is the CB812 suitable for high-load or seismic applications?

Yes. The CB812 is engineered to provide increased uplift resistance for wind or seismic loading, making it well suited for demanding column installations subject to high loads, wind uplift, or seismic forces.