The Simpson Strong-Tie 4 X 4 Column Base Black is a cast-in-place post base engineered to create a structurally sound connection between a 4x4 wood column and a concrete foundation. Designed with the base plate sitting flush with the concrete surface, it resists wood member rotation at the base - making it a reliable choice for decks, pergolas, carports with top support, and other structural framing applications where a clean, finished look matters as much as performance.

Key Features

• Cast-in-place design with base plate flush to concrete - ensures proper load transfer and structural performance exactly as engineered, with no raised profile above the slab surface
• Engineered to resist wood member rotation at the base - adds stability to structural posts where lateral movement at the connection point could compromise the overall frame
• Textured black powder-coat finish - more durable and better looking than standard paint finishes, maintaining a sharp appearance on exposed structural connections
• 60% allowable load increase for wind and seismic applications - gives builders confidence when installing in regions subject to wind or earthquake loading requirements
• Sized specifically for 4x4 nominal columns - eliminates guesswork and ensures a precise, code-consistent fit without shimming or modification

Why This Product

• A finish that holds up where it counts - the textured black powder-coat resists chipping and fading better than paint, so structural hardware that stays visible on a finished deck or patio looks good long after installation
• Built-in load capacity for demanding conditions - with a 60% allowable load increase approved for wind and earthquake loading, this post base is suited for projects that must meet stricter structural requirements without requiring an upgraded connector
• Designed by Simpson Strong-Tie for consistent, reliable performance - the flush-mount cast-in-place design reflects engineering focused on predictable load transfer, giving contractors and inspectors a well-documented solution
• Made in the United States - domestic production supports consistent quality standards and reliable availability for project timelines

Specifications

• MPN: CB44PC
• Brand: Simpson Strong-Tie
• Nominal Column Size: 4x4
• Finish: Textured Black Powder-Coat
• Fasteners Required: Bolts - (2) 5/8" (sold separately)
• For Treated Lumber: No
• Width 1: 3-9/16 in.
• Width 2: 3-9/16 in.
• Country of Origin: United States

Approved Applications

• Cast-in-place post base installations where the base plate must be flush with concrete
• Structural connections requiring resistance to wood member rotation
• Applications subject to wind or earthquake loading (60% load increase allowable)
• 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

Frequently Asked Questions

How should the CB44PC be installed relative to the concrete surface?

All CB models should be installed with the bottom of the base plate flush with the concrete surface. This ensures proper load transfer and structural performance as designed.

What fasteners are required to install the CB44PC?

The CB44PC requires (2) 5/8" bolts. Always use all specified fasteners to achieve the rated allowable loads.

Can the CB44PC be used for fences or unbraced carports?

No. Post bases like the CB44PC do not provide adequate resistance to prevent members from rotating about the base and are therefore not recommended for non top-supported installations such as fences or unbraced carports.

What is the minimum side cover required for full load capacity?

A minimum side cover of 3" is required for CB models to achieve full allowable loads. Ensure this clearance is maintained during installation.

Note: Product dimensions and/or screw or bolt holes may differ from picture. Use all specified fasteners. Allowable loads have been increased 60% for wind or earthquake loading. No further increase allowed; reduce where other loads govern.