The Simpson CCO5 1/4 Column Cap (No Legs) for 5-1/8 in. Beam by Simpson is engineered to deliver strong, reliable column-to-beam connections on top of steel columns and posts. Its legless design allows for field-welded attachment directly to steel columns, while the extended seat provides additional bearing surface area that reaches beyond each side of the column - helping to distribute beam loads efficiently and reinforce the overall structural connection. Built from 3-gauge uncoated steel, this heavy-duty column cap is a dependable choice for structural framing applications where performance under seismic and wind loading is a priority.

Key Features

• Uplift load capacity increased for earthquake or wind loading - provides added structural reliability in high-stress seismic and wind events, giving builders greater confidence in critical connections.
• Bolt spacing meets NDS code requirements - ensures the installation satisfies recognized industry standards for optimal load performance right out of the box.
• Diamond holes for temporary fastening - allows the cap to be held securely in position during layout and alignment before final fasteners are installed, improving jobsite efficiency.
• Fits 5-1/8 in. beam width - precisely sized to match standard engineered lumber dimensions, reducing the need for field modification.
• Cap height of 8-1/8 in. - provides sufficient depth to fully engage the beam and support a secure, well-distributed connection at the column top.
• Made from 3-gauge uncoated steel - heavy-gauge construction delivers the strength and rigidity required for demanding structural column cap applications.

Why This Product

• Built for steel column integration - the legless, field-weld design makes this column cap a purpose-built solution for connecting beams to steel columns and posts, eliminating the compromises that come with adapting standard post caps to steel construction.
• Engineered for seismic and wind zones - with uplift loads specifically increased for earthquake and wind loading, this beam cap is well-suited for structural framing projects in regions where code compliance under lateral and uplift forces is a requirement.
• Extended seat for superior load distribution - the seat extends beyond each side of the column to spread beam loads over a larger bearing surface, reducing point stress and supporting a stronger, more stable structural connection.
• Heavy-gauge construction for demanding applications - 3-gauge uncoated steel and NDS-compliant bolt spacing work together to ensure this column-to-beam connector performs reliably in the structural conditions it was designed to meet.

Specifications

• MPN: CCO5 1/4
• Brand: Simpson Strong-Tie
• Member Size: 5-1/8 in.
• Width 1: 5-1/4 in.
• Length: 13 in.
• Height 1: 8-1/8 in.
• Cap Height: 8-1/8 in.
• Gauge: 3
• Finish: Uncoated Steel
• Coating: None
• Install With: (4) 3/4 in. diameter machine bolts (sold separately)
• Country of Origin: United States

Options

• Contact us for Configurable Options and Special orders
• For special, custom or rough-cut lumber sizes, provide dimensions.
• CCO may be ordered for field welding to pipe or other columns. Weld by designer.
• See CCO Column Cap Load Table. See Table
• See CCO Column Product Guide.

Installation

• Use all specified fasteners; see General Notes
• Weld by designer
• Bolt holes shall be a minimum of 1/32" to a maximum of 1/16" larger than the bolt diameter (per 2018 NDS, section 12.1.3.2); bolt holes should be drilled from one side all the way through the beam to maintain hole tolerances
• Contact engineered wood manufacturers for connections that are not through the wide face

Downloads and Resources

• See CCO Column Product Guide. See SPECS
• See CCO Column Cap Load Table. See Table

Frequently Asked Questions

What beam width is the CCO5 1/4 designed to fit?

The CCO5 1/4 is specifically designed for a 5-1/8 in. beam width, with a cap height of 8-1/8 in.

How is the CCO5 1/4 attached to a steel column?

The CCO5 1/4 features a legless design that enables field-welded attachment directly to steel columns and posts. Welding is to be performed by the designer.

What fasteners are required to install the CCO5 1/4?

Installation requires (4) 3/4 in. diameter machine bolts. Bolt spacing meets NDS code requirements, and bolt holes should be a minimum of 1/32" to a maximum of 1/16" larger than the bolt diameter per 2018 NDS, section 12.1.3.2.

Is the CCO5 1/4 suitable for high-wind or seismic applications?

Yes. The CCO5 1/4 is engineered with increased uplift load capacity to address demands from earthquake or wind loading, making it appropriate for use in seismic and high-wind environments.

Note: Product dimensions and/or screw or bolt holes may differ from picture.