The Simpson CBST Hot-Dip Galvanized Standoff Column Base for 4x4 is a cast-in-place post base from Simpson engineered to create a secure, long-lasting connection between wood posts and concrete foundations in residential and light commercial construction. The code-required 1 in. standoff elevates the post end above the concrete surface to reduce moisture contact and resist rot, while hot-dip galvanization delivers extra corrosion resistance for exterior installations and treated-wood applications where standard finishes fall short.

Key Features

• Code-required 1 in. standoff design - elevates the wood post above the concrete surface, preventing direct moisture contact at the post end and helping protect against rot for a longer-lasting connection
• S-shaped bearing tabs - engineered to increase connection strength and allow for higher download capacity, giving you added structural confidence in load-bearing applications
• Hot-dip galvanized finish - provides extra corrosion resistance compared to standard coatings, making this base well suited for exposed exterior environments and installations with treated wood
• Dual-gauge steel construction (base 12, strap 10) - pairs heavier strap steel with a solid base plate to balance flexibility and strength where the connection needs it most
• Designed for 4x4 nominal column size - ensures a precise, code-compliant fit for standard 4x4 wood posts without field modification

Why This Product

• Built-in rot protection from day one - the 1 in. standoff is a code-required design feature, not an afterthought, so your post-to-concrete connection starts with the moisture management already engineered in
• Galvanized for demanding conditions - hot-dip galvanization provides a thick, durable zinc coating that holds up where exterior moisture and treated-wood chemicals would degrade lesser finishes over time
• Higher download capacity through smarter geometry - the S-shaped bearing tabs are a structural upgrade that increases the strength of the connection, making this base a reliable choice for applications where download loads are a primary concern
• Made in the United States to Simpson standards - manufactured domestically and designed to meet code requirements for wood-to-concrete connections in both residential and light commercial projects

Specifications

• MPN: CBST44HDG
• Member Size: 4x4
• Width 1: 3-9/16 in.
• Width 2: 3-1/2 in.
• Depth: 7-1/8 in.
• Height: 8-3/8 in.
• Gauge: Base 12; strap 10
• Coating: Hot-Dip Galvanized
• Finish: Hot-Dip Galvanized
• Install With: Install with (2) 5/8 in. diameter machine bolts (sold separately)
• Country of Origin: United States

Frequently Asked Questions

Why does the CBST44HDG have a 1 in. standoff design?

The code-required 1 in. standoff elevates the wood post above the concrete surface, preventing direct contact between the post end and moisture that can accumulate on concrete. This helps protect the post from moisture-related rot and extends the service life of the connection.

What makes the hot-dip galvanized finish suitable for exterior applications?

Hot-dip galvanization (HDG) applies a thick, metallurgically bonded zinc coating that provides extra corrosion resistance compared to standard finishes. This makes the CBST44HDG well suited for exterior environments and installations involving treated wood, where exposure to moisture and corrosive chemicals is a concern.

What hardware is required to install the CBST44HDG?

The CBST44HDG is installed with (2) 5/8 in. diameter machine bolts, which anchor the base to the concrete foundation as part of the cast-in-place installation process.

What do the S-shaped bearing tabs on the CBST44HDG do?

The S-shaped bearing tabs are engineered to provide increased strength in the connection, allowing for higher download capacity. This design enhancement improves the overall load-bearing performance and stability of the wood post-to-concrete connection.

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