The Simpson Ornamental Column Base 8x10 Black Powder Coated is a cast-in-place column base engineered to connect structural wood columns to concrete foundations while delivering a clean, polished appearance at the base. Designed by Simpson to prevent wood members from rotating, this column base combines structural reliability with an ornamental black powder-coated finish that stands up far better to the elements than standard paint. The flush-mount base plate installs with the bottom sitting level with the concrete surface, creating a seamless, professional transition suited to residential decks, porches, pergolas, and commercial structures exposed to wind or seismic loading conditions.

Key Features

• Cast-in-place installation design - anchors directly into concrete as it cures, providing a stable, permanent connection that resists wood column rotation and keeps structural members correctly aligned over time.
• Flush-mount base plate - installs with the bottom of the plate level with the concrete surface, resulting in a finished, professional look that eliminates unsightly gaps at the column base.
• Black powder-coated finish - delivers a more durable, corrosion-resistant surface than conventional paint, maintaining a sharp ornamental appearance in outdoor and exposed environments.
• 60% load increase for wind and seismic conditions - allowable loads are rated for a 60% increase under wind or earthquake loading, making this base suitable for structures in high-stress or code-regulated environments.
• Requires only two 3/4 in. machine bolts - straightforward fastener requirements simplify installation and help ensure the column base achieves its full rated load capacity without guesswork.
• Minimum 3 in. side cover requirement for full loads - a clearly defined installation parameter helps contractors and builders plan the concrete pour correctly to meet structural performance expectations.

Why This Product

• Structural and ornamental in one unit - this column base handles rotation prevention and load transfer while the black powder-coated finish means there is no need for a separate decorative cover or post-installation painting.
• Built for demanding load conditions - the 60% allowable load increase for wind and earthquake applications makes this a practical choice for projects in regions with seismic activity or high-wind exposure, without requiring an upgrade to a heavier connector.
• Flush installation creates a finished look from the ground up - the base plate is specifically engineered to sit flush with concrete, so the column-to-foundation connection looks intentional and refined rather than purely utilitarian.
• Domestic quality assurance - produced in the United States, this ornamental post base is built to consistent manufacturing standards, giving buyers confidence in dimensional accuracy and finish quality for both structural and visible applications.

Specifications

• Model Number: OCB810
• Gauge: 3
• W1 Dimension: 71/2 in.
• W2 Dimension: 91/2 in.
• Coating / Material: Powder Coating, Black
• Country of Origin: United States

Installation Guidelines

• Fasteners required: (2) 3/4" Machine Bolts
• Install all models with the bottom of the base plate flush with concrete
• Minimum side cover for full loads is 3 inches
• Allowable loads have been increased 60% for wind or earthquake loading. No further increase allowed; reduce where other loads govern.

Approved Applications

• Cast-in-place concrete column base installations
• Structural wood column connections to concrete foundations
• Applications requiring rotation prevention of wood members
• Projects where an ornamental, finished appearance is desired at the column base
• Structures subject to wind or seismic loading conditions

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

Frequently Asked Questions

How should the OCB810 base plate be installed relative to the concrete surface?

The OCB810 is designed as a cast-in-place column base, and the bottom of the base plate should be installed flush with the concrete surface. This flush-mount design creates a clean, seamless transition between the structure and the finished surface.

What fasteners are required to install the OCB810?

Installation of the OCB810 requires two 3/4" machine bolts. Ensuring the correct fasteners are used is important for achieving the rated load capacity of the column base.

What is the minimum side cover required for the OCB810 to achieve full load capacity?

A minimum side cover of 3 inches is required for the OCB810 to achieve its full allowable load capacity. If this minimum side cover cannot be met, the allowable loads must be reduced accordingly.

How does the powder-coated finish on the OCB810 compare to standard paint, and what are the column base dimensions?

The OCB810 features a flat black powder-coated finish, which provides a more durable and attractive appearance than standard paint applications. The base has a W1 dimension of 71/2 in. and a W2 dimension of 91/2 in., and its Gauge 3 heavy-duty construction supports allowable loads that are increased 60% for wind or earthquake loading.