The Simpson Strong-Tie OCB46 Ornamental Column Base is a cast-in-place column base engineered to help prevent wood members from rotating while delivering a refined, architectural appearance. Designed for installation with the bottom of the base plate flush with the concrete, the OCB46 combines structural performance with a striking flat black powder-coated finish - a coating that is significantly more durable and better looking than standard paint. Manufactured in the United States, this heavy-gauge column base is built to meet the demands of both residential and light commercial applications where load resistance and visual appeal are equally important.

Key Features

• Prevents Rotation: Cast-in-place design helps prevent wood members from rotating at the base connection.
• Flush-Mount Base Plate: Bottom of the base plate is designed to install flush with the concrete surface for a clean, finished look.
• Flat Black Powder-Coated Finish: Produces a much more durable and better-looking finish than standard paint.
• Heavy-Gauge Construction: Built from 3-gauge steel for exceptional strength and longevity.
• Wind & Earthquake Load Rating: Allowable loads have been increased 60% for wind or earthquake loading. No further increase allowed; reduce where other loads govern.
• Minimum Side Cover: Minimum side cover for full loads is 3" for CB-style bases.
• Domestic Manufacturing: Made in the United States.

Specifications

• Model Number: OCB46
• Gauge: 3
• W1 (in.): 3 9/16
• W2 (in.): 5 1/2
• Coating / Material: Powder Coating, Black
• Required Fasteners: (2) 5/8" Machine Bolts
• Minimum Side Cover for Full Loads: 3" (for CB models)
• Wind / Seismic Load Increase: 60% increase allowed for wind or earthquake loading
• Country of Origin: United States

Approved Applications

• Cast-in-place column base connections where wood members require rotation restraint
• Installations requiring the base plate to sit flush with a concrete surface
• Applications subject to wind or earthquake loading where a 60% load increase is applicable
• Architectural or decorative structural applications requiring an ornamental black powder-coated finish
• Projects demanding a minimum 3" side cover for full load capacity

Installation Notes

• Fasteners required: (2) 5/8" Machine Bolts
• 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 models.

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

Frequently Asked Questions

What size post is the OCB46 designed to support?

The OCB46 is sized for a 4 x 6 wood post. The W1 dimension is 3 9/16 inches and the W2 dimension is 5 1/2 inches, corresponding to the actual dimensions of a nominal 4 x 6 lumber member.

How is the OCB46 installed relative to the concrete surface?

The OCB46 is a cast-in-place column base, meaning it is set into the concrete during the pour. The bottom of the base plate is designed to install flush with the concrete surface, resulting in a clean, finished appearance at ground level.

How durable is the finish on the OCB46?

The OCB46 features a flat black powder-coated finish, which is significantly more durable and better looking than standard paint. This coating helps protect the heavy-gauge 3-gauge steel construction over the long term in both residential and light commercial applications.

Does the OCB46 have a wind and earthquake load rating?

Yes. The allowable loads for the OCB46 have been increased 60% for wind or earthquake loading. No further increase is allowed, and loads should be reduced where other loads govern. Additionally, minimum side cover for full loads is 3 inches for CB-style bases.