The Simpson CB88R CB Column Base for 8x8 Rough by Simpson is engineered to connect posts to concrete foundations across a wide range of lumber, glulam, and engineered wood product sizes. Cast-in-place or wet set into concrete, the base plate sits flush with the concrete surface to provide full post bearing for maximum load transfer. Whether you are setting structural columns in new construction or replacing a column base in a high-demand application, the CB88R delivers the high structural values and rugged performance that demanding projects require.

Key Features

• Increased uplift resistance for wind or seismic loading - provides added security in areas subject to high-wind or earthquake forces, helping columns stay anchored under dynamic lateral and vertical loads
• Bolt hole locations meet code-required spacing for optimal capacity - hole placement is engineered to satisfy building code requirements, so you can achieve rated load values without field modification
• Nominal column size: 8x8 rough - sized specifically for rough-sawn lumber as well as glulam and engineered wood products of the corresponding dimension, reducing fitment guesswork on the job site
• Steel gauge: strap 3 ga., base 7 ga. - heavier-gauge steel construction in the strap and base provides the rigidity and strength needed for high-load structural column connections
• Simpson Strong-Tie gray paint finish - factory-applied coating delivers baseline corrosion resistance and a clean, consistent appearance for structural installations

Why This Product

• Dual installation methods suit your project timeline - the CB88R can be cast-in-place or wet set into concrete, giving contractors flexibility to choose the method that best fits their pour schedule and site conditions
• Full post bearing means direct, efficient load transfer - because the base plate sits flush with the concrete surface, the entire post end bears on a solid surface, supporting high structural values without relying solely on fasteners
• Engineered for wind and seismic zones - built-in uplift resistance makes this column base a practical choice for structural posts in regions where code mandates resistance to wind uplift or seismic forces
• Broad material compatibility reduces sourcing complexity - designed to work with standard lumber, glulam, and engineered wood products in the 8x8 rough dimension, so it fits the column materials you are already specifying

Specifications

• Manufacturer: Simpson Strong-Tie
• MPN: CB88R
• Nominal Column Size: 8x8 rough
• Steel Gauge: Strap 3 ga.; Base 7 ga.
• Coating / Finish: Simpson Strong-Tie Gray Paint
• Install With: (2) 3/4-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 CB88R designed for?

The CB88R is designed for a nominal 8x8 rough column size, making it compatible with rough-sawn lumber as well as glulam and engineered wood products of the corresponding dimension.

How is the CB88R installed into concrete?

The CB88R can be either cast-in-place or wet set into concrete. In both methods, the bottom of the base plate sits flush with the concrete surface, providing full post bearing for maximum load transfer.

What fasteners are required to install the CB88R?

Installation requires (2) 3/4-in. diameter machine bolts. The bolt hole locations are positioned to meet code-required spacing for optimal load capacity.

Is the CB88R suitable for high-wind or seismic applications?

Yes. The CB88R features increased uplift resistance specifically designed to handle the demands of wind and seismic loading, making it appropriate for structural applications in areas subject to these forces.

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