The Simpson Strong-Tie OCB66 Ornamental Column Base is a cast-in-place column base engineered to prevent wood members from rotating while delivering a refined, architectural appearance. Designed for 6 x 6 post applications, the OCB66 features a flat black powder-coated finish that produces a significantly more durable and better-looking result than standard paint. The base plate installs flush with the concrete surface for a clean, low-profile presentation that suits both structural and decorative applications. Manufactured in the United States, the OCB66 combines Simpson Strong-Tie's trusted engineering precision with a finish built to withstand the demands of outdoor and exposed environments.

Key Features

• Prevents Rotation: Cast-in-place design effectively prevents wood members from rotating at the base connection.
• Flush Base Plate: Bottom of the base plate is designed to install flush with the concrete surface for a clean, finished appearance.
• Flat Black Powder-Coated Finish: Produces a more durable and better-looking finish than standard paint, with superior resistance to chipping, fading, and corrosion.
• Heavy-Gauge Construction: Built to 3-gauge material specifications for robust structural performance.
• Wind & Seismic Load Rated: Allowable loads have been increased 60% for wind or earthquake loading. No further increase is allowed; reduce where other loads govern.
• Ornamental Aesthetic: Designed to complement exposed post installations where appearance matters as much as performance.
• Made in the USA: Manufactured in the United States to Simpson Strong-Tie quality standards.

Specifications

• Specification: Detail
• Model Number: OCB66
• Gauge: 3
• W1 (in.): 51/2
• W2 (in.): 51/2
• Coating: Powder Coating, Black
• Fasteners Required: (2) 5/8" Machine Bolts
• Country of Origin: United States

Approved Applications

• Cast-in-place column base connections for 6 x 6 wood post installations
• Structural post bases in applications subject to wind or seismic loading (60% load increase allowable)
• Exposed architectural column bases where an ornamental black powder-coated finish is desired
• Installations requiring base plate to sit flush with the concrete surface
• Applications requiring minimum 3" side cover from the concrete edge for full allowable loads

Installation Notes

• Install all models with the bottom of the base plate flush with the concrete.
• Fasteners required: (2) 5/8" Machine Bolts.
• 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 column bases.

Frequently Asked Questions

What post size is the OCB66 compatible with?

The OCB66 is specifically designed for 6 x 6 post applications, making it suitable for standard 6 x 6 wood column installations in both structural and decorative settings.

How does the powder-coated finish differ from standard paint?

The flat black powder-coated finish on the OCB66 produces a more durable and better-looking result than standard paint, offering superior resistance to chipping, fading, and corrosion - making it well suited for outdoor and exposed environments.

How is the OCB66 installed?

The OCB66 is a cast-in-place column base, meaning it is set into concrete during the pour. The base plate is designed to install flush with the concrete surface, resulting in a clean, low-profile appearance once installation is complete.

Is the OCB66 rated for wind and seismic loads?

Yes. The OCB66 carries allowable loads that have been increased 60% for wind or earthquake loading. No further increase beyond that adjustment is allowed, and loads should be reduced where other load conditions govern.