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.
