The Simpson CB7 1/8-7 Column Base from Simpson Strong-Tie is engineered to create a secure, load-bearing connection between a PSL 7-1/8 in. x 7 in. column and a concrete foundation. Designed for cast-in-place or wet-set installation, the base plate sits flush with the concrete surface to deliver full post bearing and reliable load transfer. Built from heavy-gauge steel with a Simpson Strong-Tie gray paint finish, this column base is the go-to choice for structural applications in lumber, glulam, and engineered wood product framing where high structural values and rugged, long-term performance are required.

Key Features

• Increased uplift resistance for wind or seismic loading - engineered to handle the lateral and vertical forces that occur in high-wind or earthquake-prone environments, giving you a more resilient structural connection.
• Bolt hole locations meet code-required spacing for optimal capacity - pre-positioned holes align with code requirements so you can install with confidence that the connection achieves its rated load values.
• Cast-in-place or wet-set installation method - the base plate sits flush with the concrete surface once set, ensuring full post bearing across the entire column footprint and maximizing load transfer to the foundation.
• Heavy-gauge steel construction - strap 3 ga., base 7 ga. - thicker strap steel and a solid base plate deliver the structural rigidity needed for columns carrying significant loads in demanding residential and commercial applications.
• Simpson Strong-Tie gray paint finish - a durable factory-applied coating provides corrosion resistance and a clean, professional appearance right out of the box.

Why This Product

• Purpose-built for PSL columns - sized precisely for a PSL 7-1/8 in. x 7 in. engineered wood product column, this base eliminates the guesswork of adapting a generic connector to an engineered wood member and ensures a snug, code-compliant fit.
• Flush-mount design for full bearing area - because the base plate is set flush with the concrete rather than sitting on top of it, the entire column end bears on the foundation, reducing concentrated stress points and supporting higher load demands.
• Engineered for wind and seismic zones - the increased uplift resistance built into this column base makes it a practical choice for projects in regions where building codes require connections capable of resisting lateral and uplift forces.
• Made in the United States by a trusted structural connector brand - domestic production under Simpson Strong-Tie quality standards means consistent dimensions and material properties, which matters when structural performance and inspection compliance are on the line.

Specifications

• Manufacturer Part Number (MPN): CB7 1/8-7
• Brand: Simpson Strong-Tie
• Nominal Column Size: PSL 7-1/8 in. x 7 in.
• Steel Gauge - Strap: 3 ga.
• Steel Gauge - Base: 7 ga.
• Finish / Coating: Simpson Strong-Tie Gray Paint
• Installation Fasteners: (2) 3/4-in. diameter machine bolts
• Width 1: 7-1/4 in.
• Width 2: 7 in.
• Country of Origin: United States

Approved Applications

• Connecting posts and columns to concrete foundations
• Structural support for lumber, glulam, and engineered wood product (EWP) columns
• Applications requiring high structural values and rugged performance
• Installations subject to wind or seismic loading where increased uplift resistance is required
• Cast-in-place or wet-set concrete foundation connections

What's Included

• (1) Simpson Strong-Tie CB7 1/8-7 Column Base
• Note: Requires (2) 3/4-in. diameter machine bolts for installation (sold separately).

• Contact us for Configurable Options and Special orders

Frequently Asked Questions

What column size is the CB7 1/8-7 designed to fit?

This column base is designed specifically for a PSL 7-1/8 in. x 7 in. column, providing a precise and secure connection for that engineered wood product size.

How is the CB7 1/8-7 installed in concrete?

The CB7 1/8-7 is either cast-in-place or wet set into concrete so that the bottom of the base plate sits flush with the concrete surface, ensuring full post bearing and maximum load transfer.

What fasteners are required to install this column base?

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

What materials and finish are used in the construction of this column base?

The CB7 1/8-7 features a 3-gauge steel strap and a 7-gauge steel base plate for heavy-duty strength and durability. It is finished with a Simpson Strong-Tie gray paint coating that provides corrosion resistance and a professional appearance.