The Simpson 4x6 Column Base CB64HDG Hot Dip Galvanized Post Base by Simpson is a heavy-duty structural connector engineered to create reliable, high-strength connections between posts and concrete foundations. Designed for use with 4x6 columns as well as compatible lumber, glulam, and engineered wood products, this column base installs via cast-in-place or wet-set concrete placement, with the base plate sitting flush with the concrete surface to ensure full post bearing. Its hot-dip galvanized finish makes it well suited for exterior applications and environments where corrosion resistance is a priority, while its bolt hole layout is positioned to meet code-required spacing for optimal load capacity under wind or seismic loading conditions.

Key Features

• Hot-dip galvanized finish - provides superior corrosion resistance compared to standard coatings, making this post base a dependable choice for exterior, exposed, or corrosive-environment installations where long-term durability matters.
• Flush base plate design - sits level with the concrete surface when cast in place or wet set, ensuring full post bearing and a clean, structurally sound connection from the ground up.
• Code-compliant bolt hole spacing - bolt locations are positioned to meet code-required spacing requirements, helping contractors and builders maintain compliance without additional field modifications.
• High uplift resistance - engineered to handle the demands of wind and seismic loading applications, giving builders confidence in structural performance where it matters most.
• Broad column compatibility - works with 4x6 lumber as well as glulam and engineered wood product columns, offering flexibility across a wide range of residential and commercial structural applications.
• Made in the United States - domestic manufacturing supports consistent quality standards for a connector relied upon in load-bearing structural installations.

Why This Product

• Built for demanding structural environments - the combination of high uplift resistance and a hot-dip galvanized finish means this column base is equally at home in seismic zones, high-wind regions, and outdoor or corrosive conditions where lesser hardware would fall short.
• Versatile fit for real-world jobsites - compatibility with lumber, glulam, and engineered wood products means contractors working across different column types can rely on a single, trusted solution rather than sourcing multiple connectors.
• Designed to streamline code compliance - with bolt hole locations engineered to meet code-required spacing, this post base reduces the guesswork and field adjustments that can slow down structural column installations.
• Engineered by a trusted structural connector brand - Simpson products are a recognized standard in structural construction, so specifying this column base carries weight with inspectors, engineers, and general contractors alike.

Specifications

• Manufacturer: Simpson Strong-Tie
• MPN: CB64HDG
• Nominal Column Size: 4 x 6
• Finish: Hot-Dip Galvanized
• Fasteners Required: Bolts - (2) 5/8" (sold separately)
• Width 1: 5-1/2 in.
• Width 2: 3-9/16 in.
• Country of Origin: United States

Approved Applications

• Connecting posts to concrete foundations in residential and commercial construction
• Structural column installations requiring high uplift resistance under wind or seismic loading
• Use with lumber, glulam, and engineered wood product columns
• Cast-in-place or wet-set concrete foundation connections
• Exterior and corrosive-environment installations where galvanized protection is required

What's Included

• 1 x Simpson Strong-Tie CB64HDG Hot-Dip Galvanized Column Base (4 x 6)
• Note: (2) 5/8" bolts are required for installation and are not included

• 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 CB64HDG designed to fit?

The CB64HDG is designed for use with 4 x 6 columns. It is also compatible with a wide range of lumber, glulam, and engineered wood product sizes, making it versatile for various structural applications.

How is the CB64HDG installed?

The CB64HDG is installed by casting it in place or wet setting it into concrete, with the base plate sitting flush with the concrete surface. This flush installation method ensures full post bearing for optimal load transfer.

What fasteners are required to install the CB64HDG?

The CB64HDG requires two 5/8" bolts for installation. The bolt hole locations are designed to meet code-required spacing for optimal load capacity.

Why is the CB64HDG finished with hot-dip galvanization?

The hot-dip galvanized finish provides superior corrosion resistance, making the CB64HDG well suited for exterior and exposed environments where moisture or harsh conditions could degrade an uncoated connector over time.