The Simpson 6 x 6 Column Base, Hot-Dip Galvanized CB66HDG by Simpson is engineered to connect posts to concrete foundations across a wide range of lumber, glulam, and engineered wood product sizes. This column base is either cast-in-place or wet set into concrete, with the bottom of the base plate sitting flush with the concrete surface to provide full post bearing. Fabricated from 7-gauge steel with a hot-dip galvanized finish, it delivers high structural values and rugged performance, making it a reliable solution for exterior columns, pressure-treated wood applications, and structures in demanding wind or seismic environments.

Key Features

• Increased uplift resistance for wind or seismic loading - helps keep structural columns anchored and secure in high-stress conditions, including hurricane and earthquake zones.
• Bolt hole locations meet code-required spacing for optimal capacity - ensures proper fastener placement right out of the box, simplifying inspections and reducing installation guesswork.
• Made from 7-gauge steel - provides the heavy-duty thickness needed to handle the high structural loads common in residential and commercial column applications.
• Hot-dip galvanized coating - offers extra corrosion resistance for exterior environments and direct contact with pressure-treated lumber, extending the service life of the connection.
• Cast-in-place or wet-set installation flexibility - accommodates different concrete pour schedules and jobsite conditions, with the base plate flush to the concrete surface for full post bearing.

Why This Product

• Built for corrosive environments - the hot-dip galvanized finish provides a higher level of corrosion protection than standard zinc plating, making this column base well suited for exterior post bases, coastal conditions, and treated-lumber contact where long-term durability matters.
• Designed for structural confidence in high-demand conditions - with increased uplift resistance and code-compliant bolt hole spacing, this post base is engineered specifically for columns that need to perform in wind-prone or seismic regions without compromising capacity.
• Versatile compatibility with multiple wood products - designed to work with standard lumber, glulam, and engineered wood products in a 6x6 nominal column size, making it a practical choice for a wide range of structural framing scenarios.
• American-made quality for a critical structural connection - produced in the United States by Simpson, a manufacturer known for structural connector hardware, this column base is made to meet the demands of professional builders and contractors.

Specifications

• MPN: CB66HDG
• Brand: Simpson Strong-Tie
• Nominal Column Size: 6x6
• Width 1: 5-1/2 in.
• Width 2: 5-1/2 in.
• Gauge: 7
• Coating / Finish: Hot-Dip Galvanized
• Install With: (2) 5/8-in. diameter HDG machine bolts (sold separately)
• Country of Origin: United States

Approved Applications

• Connecting posts to concrete foundations in residential and commercial construction
• Cast-in-place concrete column base installations
• Wet-set concrete column base installations
• Exterior structural columns requiring corrosion resistance
• Columns in contact with or near pressure-treated lumber
• Structures in high-wind or seismic zones requiring increased uplift resistance

Options

• Contact us for Configurable Options and Special orders

Frequently Asked Questions

How is the CB66HDG installed into concrete?

The CB66HDG is designed to 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, ensuring full post bearing on the concrete foundation.

What type of steel and finish is used on the CB66HDG?

The CB66HDG is fabricated from 7-gauge steel and features a hot-dip galvanized (HDG) finish. This coating provides enhanced corrosion resistance, making it well suited for exterior environments and applications involving pressure-treated lumber.

What fasteners are required to install the CB66HDG?

Installation requires (2) 5/8-in. diameter HDG machine bolts. The bolt hole locations are positioned to meet code-required spacing for optimal load capacity.

Is the CB66HDG suitable for use in high-wind or seismic areas?

Yes. The CB66HDG is designed with increased uplift resistance, making it appropriate for structural columns in regions subject to wind or seismic loading requirements.

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