The Simpson CBST46HDG CBST Hot-Dip Galvanized Standoff Column Base is a cast-in-place column base engineered by Simpson to deliver a secure, long-lasting connection between 4x6 wood posts and concrete foundations in residential and light commercial construction. Built with a code-required 1 in. standoff that keeps wood elevated above the concrete surface, this post base actively works to prevent moisture-related post-end rot - making it a dependable solution for exterior structural applications and treated-wood installations where durability is non-negotiable.

Key Features

• Code-required 1 in. standoff design - elevates the post above the concrete surface, cutting off direct moisture contact at the post end and protecting against rot-related structural degradation over time
• S-shaped bearing tabs - provide increased strength and allow for higher download loads, giving builders and engineers greater confidence in the connection's capacity
• Hot-dip galvanized coating - delivers extra corrosion resistance purpose-built for exterior environments and use with preservative-treated lumber, where standard coatings fall short
• Dual-gauge steel construction (base 12, strap 10) - pairs a heavier strap with a sturdy base plate so the assembly resists deformation under real-world structural loads
• Sized for nominal 4x6 columns - ensures a proper, code-compliant fit for standard framing members without field modification

Why This Product

• Built-in moisture protection at the foundation - the 1 in. standoff keeps the post end dry and ventilated, addressing one of the most common causes of premature post failure in outdoor and ground-level applications
• HDG finish goes where standard coatings cannot - hot-dip galvanization provides the level of corrosion resistance required for exposed exterior conditions and compatibility with treated wood, extending the service life of the entire connection
• Higher download capacity through smarter geometry - the S-shaped bearing tabs are not a cosmetic detail; they translate directly into a stronger, more capable connection that supports demanding residential and light commercial load requirements
• Made in the United States to Simpson engineering standards - consistent manufacturing quality and adherence to code requirements mean this column base can be specified and installed with confidence on permitted projects

Specifications

• Model Number: CBST46HDG
• Member Size: 4x6
• Width 1: 3-9/16 in.
• Width 2: 5-5/16 in.
• Depth: 7-13/16 in.
• Height: 8-11/16 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 CBST46HDG 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 wood and concrete. This reduces moisture exposure at the post end, which is a primary cause of post-end rot and premature structural degradation.

What makes the hot-dip galvanized coating important for this column base?

Hot-dip galvanization (HDG) provides extra corrosion resistance, making the CBST46HDG suitable for exterior applications and use with treated wood, where standard coatings may not offer adequate protection against the elements or chemical exposure from preservative-treated lumber.

What hardware is needed to install the CBST46HDG?

The CBST46HDG is installed with (2) 5/8 in. diameter machine bolts, which anchor the base securely to the concrete foundation.

What construction applications is the CBST46HDG designed for?

The CBST46HDG is designed for residential and light commercial construction, providing reliable wood-to-concrete post connections with increased download capacity and stability across a variety of environments.

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