The Simpson Strong-Tie CB46PC 4 x 6 Column Base is a cast-in-place post base engineered to anchor wood columns securely to concrete while helping prevent wood members from rotating at the base. Designed with a bottom base plate intended to sit flush with the concrete surface, this column base delivers a clean, professional finish alongside structural reliability. The CB46PC features a textured flat black powder-coated finish, providing a significantly more durable and visually refined appearance than standard painted finishes - making it ideal for both structural and architectural applications where aesthetics matter.

Key Features

• Cast-in-place design - base plate installs flush with the concrete surface for a clean, low-profile appearance
• Rotation resistance - engineered to help prevent wood members from rotating about the base
• Textured black powder-coated finish - more durable and better looking than standard paint finishes
• 7-gauge steel construction - heavy-duty material thickness for structural integrity
• Made in the United States - manufactured by Simpson Strong-Tie
• Allowable loads increased 60% for wind or earthquake loading (no further increase allowed; reduce where other loads govern)

Specifications

• Manufacturer: Simpson Strong-Tie
• Model / MPN: CB46PC
• Finish: Textured Black Powder-Coat
• Material Thickness: 7 Gauge
• Fasteners Required: Bolts - (2) 5/8"
• For Treated Lumber: No
• Installation Type: Cast-in-place
• Country of Origin: United States

Approved Applications

• Anchoring 4 x 6 wood columns to concrete foundations, slabs, or footings
• Residential and commercial post-to-concrete connections where a flush base plate is required
• Architectural column installations where a decorative black powder-coat finish is desired
• Structural applications requiring increased load capacity for wind or seismic loading conditions

Not recommended for: non-top-supported installations such as fences or unbraced carports, as post bases do not provide adequate resistance to prevent members from rotating about the base in those scenarios.

Installation Guidelines

• Use all specified fasteners - (2) 5/8" bolts required.
• Install all models with the bottom of the base plate flush with concrete.
• Allowable loads have been increased 60% for wind or earthquake loading. No further increase allowed; reduce where other loads govern.
• Minimum side cover for full loads is 3" for CB-series bases.
• Post bases do not provide adequate resistance to prevent members from rotating about the base and therefore are not recommended for non-top-supported installations (such as fences or unbraced carports).

Disclaimer: Product dimensions and/or screw or bolt holes may differ from picture.

Frequently Asked Questions

How is the CB46PC installed - does it sit on top of the concrete or embed into it?

The CB46PC is a cast-in-place column base, meaning the bottom base plate is designed to install flush with the concrete surface. This creates a clean, low-profile appearance rather than sitting visibly on top of the slab.

What fasteners are required to attach the wood column to the CB46PC?

The CB46PC requires two 5/8" bolts to secure the wood column. Note that this column base is not approved for use with treated lumber.

How does the powder-coat finish on the CB46PC compare to a standard painted finish?

The CB46PC features a textured flat black powder-coated finish, which is both more durable and more visually refined than standard painted finishes. This makes it well suited for applications where appearance matters alongside structural performance, such as architectural or exposed structural installations.

Are load values for the CB46PC affected by wind or earthquake conditions?

Yes. Allowable loads for the CB46PC are increased 60% for wind or earthquake loading. However, no further load increase beyond that 60% is permitted, and loads must be reduced where other governing load conditions apply.