The Simpson CCOS3.12 Steel Column Cap delivers a high-capacity connection for column-to-beam combinations in structural framing applications. This cap-only configuration - without column straps - was designed specifically for field welding to a steel column, making it the right choice when welding is the preferred attachment method. Once welded in place, the connector attaches to the column end plate quickly using the included self-tapping screws, reducing installation steps on the job site. Compatible with both solid sawn lumber and engineered wood products, this heavy-duty steel connector handles the demands of larger girder loads with confidence.

Key Features

• No-strap cap-only design - purpose-built for field welding to a steel column, eliminating unnecessary hardware and simplifying the connection in steel column applications
• Adequate bearing length for larger girder reactions - supports heavy load transfer at the column-to-beam joint, making it suitable for demanding structural framing conditions
• Compatible with solid sawn lumber and engineered wood products - gives builders flexibility to use the connector across a range of beam materials without sourcing a different connector
• Self-tapping screws included - the required fasteners come in the box, so installation to the column end plate can begin immediately without a separate hardware run
• Constructed from 7-gauge steel - heavy-gauge material provides the structural rigidity needed to handle high-capacity column-to-beam connections
• G90 zinc galvanized finish - corrosion-resistant coating helps protect the connector in exposed or moisture-prone framing environments

Why This Product

• Engineered for steel column welding - the strap-free design is not a compromise but a deliberate engineering choice, purpose-built for applications where the cap is welded directly to a steel column end plate, keeping the connection clean and structurally sound
• Faster field installation - self-tapping screws are included and attachment to the column cap plate is straightforward, so crews spend less time sourcing fasteners and more time moving the project forward
• Handles high-load girder connections - the connector provides adequate bearing length for larger girder reactions, making it well-suited for heavy timber framing, post-and-beam construction, and other applications where load demands are significant
• Durable corrosion-resistant construction - 7-gauge steel with a G90 galvanized coating means this connector is built to last in the structural environments where column caps are typically installed, including covered outdoor and semi-exposed conditions

Specifications

• MPN: CCOS3.12
• Brand: Simpson Strong-Tie
• Seat Width: 3-1/8 in.
• Member Size: Double 2x10, double 2x12
• Gauge: 7
• Coating: Zinc Galvanized, G90
• Finish: Zinc Galvanized, G90
• Country of Origin: United States
• Install With: Attach steel column cap to column end plate with (4) self-tapping screws (included) and 5/16 in. hex driver; attach to girder with 0.148 in. x 3 in. nails

What's Included

Each pack contains (1) CCOS3.12 Steel- Column Cap, (4) self-tapping screws.

Frequently Asked Questions

What type of column is the CCOS3.12 designed to be used with?

The CCOS3.12 cap-only design was created specifically for field welding to a steel column. The absence of column straps makes it ideal for steel column applications where welding is the preferred attachment method.

What fasteners are required to install the CCOS3.12, and are they included?

Installation requires (4) self-tapping screws and a 5/16 in. hex driver to attach the column cap to the column end plate. The (4) self-tapping screws are included with the connector. To attach the cap to the girder, 0.148 in. x 3 in. nails are required.

What beam sizes is the CCOS3.12 compatible with?

The CCOS3.12 is compatible with double 2x10 and double 2x12 beam members, and is suitable for use with both solid sawn lumber and engineered wood products.

What material and finish is the CCOS3.12 made from?

The CCOS3.12 is constructed from 7-gauge steel and features a Zinc Galvanized, G90 coating and finish, which provides corrosion resistance for demanding structural environments.

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