The Simpson CBS46 Galvanized Standoff Column Base for 4x6 from Simpson Strong-Tie is an engineered post base designed to embed directly in wet concrete at the time of pour, creating a strong, code-compliant connection between a 4x6 post or column and its concrete foundation. Built to the exacting standards that engineers and contractors rely on, this standoff column base combines structural reliability with G90 galvanized protection, making it a dependable choice for decks, pergolas, covered structures, and other applications where a secure post-to-concrete connection is required.

Key Features

• Shipped with base plate assembled - arrives ready to embed at the job site, reducing setup time and simplifying the concrete pour process.
• Base plate provides a 1 in. standoff clearance required by code - keeps the wood post elevated above the concrete surface to meet code requirements right out of the box.
• Standoff base reduces the potential for decay at post and column ends - by lifting the wood away from direct contact with concrete and standing water, the connector helps extend the life of your post or column.
• Nominal column size: 4x6 - sized specifically for 4x6 lumber, ensuring a proper, snug fit without guesswork or field modification.
• Steel gauge: Base 12, strap 10 - the heavier strap gauge adds load-transfer strength where it matters most, giving the connection extra structural integrity.
• Galvanized (G90) for extra corrosion resistance - the zinc G90 coating provides a durable barrier against rust and weathering, making this connector well-suited for outdoor and moisture-exposed installations.

Why This Product

• Engineered and tested for structural confidence - Simpson Strong-Tie connectors are manufactured to high quality standards and engineered to perform, so this column base delivers proven load-carrying performance rather than guesswork.
• G90 galvanized coating for long-term durability - the zinc galvanized finish resists corrosion in outdoor settings, helping the connector hold up in environments exposed to weather, humidity, or water splash over the life of the structure.
• Code-ready standoff design protects your investment - the built-in 1 in. standoff clearance satisfies code requirements and actively reduces decay risk at the column base, which can save significant repair costs down the road.
• Pre-assembled and embed-ready - because the base plate ships fully assembled, this post base simplifies the concrete pour step and helps keep the project on schedule without extra assembly work on site.

Specifications

• MPN: CBS46
• Brand: Simpson Strong-Tie
• Member Size: 4x6
• Coating: Zinc Galvanized, G90
• Finish: Zinc Galvanized, G90
• Gauge: Base 12; strap 10
• Install With: Install with 5/8 in. diameter machine bolts
• Country of Origin: United States

Frequently Asked Questions

How is the CBS46 installed?

The CBS46 embeds directly in wet concrete at the time of pour. Once the concrete has cured, the 4x6 post or column is secured to the base using 5/8 in. diameter machine bolts.

Why is the 1 in. standoff clearance important?

The 1 in. standoff clearance is required by code and helps reduce the potential for decay at post and column ends by keeping the wood elevated away from the concrete surface and any water that may accumulate.

What type of corrosion protection does the CBS46 have?

The CBS46 features a G90 zinc galvanized coating, which provides extra corrosion resistance, making it suitable for use in environments exposed to weather or water splash.

Is the base plate pre-assembled when the CBS46 is shipped?

Yes, the CBS46 is shipped with the base plate already assembled, streamlining installation on the job site.

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