The Simpson CCO4/6 CCO Column Cap (No Legs) for 4x Beam, 6-1/2 in. Height 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 beyond each side of the column, helping distribute beam loads and reinforce the overall structural connection. Built from heavy-duty 7-gauge uncoated steel, this column cap is a dependable choice for structural framing applications that demand enhanced uplift resistance against earthquake and wind loading forces.

Key Features

• Uplift loads increased for earthquake or wind loading - provides greater resistance in high-stress seismic and wind-prone environments, helping meet demanding structural requirements
• Bolt spacing meets NDS code requirements - ensures the connection performs to recognized industry standards, reducing the need for field calculations or adjustments
• Diamond holes for temporary fastening - allow the cap to be held in position during installation before final bolting, making alignment faster and safer on the job site
• Fits nominal 4x or 3-1/2 in. beam width - compatible with standard dimensional lumber in that size category, simplifying material selection and coordination
• Cap height of 6-1/2 in. - provides a defined bearing zone that supports proper load transfer between the beam and column
• Made from 7-gauge uncoated steel - heavy-gauge construction delivers the structural strength needed for load-bearing column cap applications

Why This Product

• Field-weld flexibility for steel column connections - the legless design is specifically intended for field-welded attachment to steel columns and posts, giving engineers and contractors the freedom to adapt the connection on site without relying on pre-configured leg geometry
• Extended seat for superior load distribution - the seat of the column cap reaches beyond each side of the column, spreading the beam load over a greater surface area and reinforcing the connection in a way that a flush-fit cap cannot
• Built to perform in high-load and code-sensitive applications - with uplift capacity increased for seismic and wind conditions and bolt spacing that meets NDS code requirements, this column cap is suited for projects where structural performance and code compliance are non-negotiable
• Heavy-gauge steel construction for demanding structural work - 7-gauge uncoated steel provides the rigidity and load-bearing capacity expected in column cap hardware used for beam-to-column framing connections

Specifications

• MPN: CCO4/6
• Brand: Simpson Strong-Tie
• Member Size: 4x, 3-1/2 in.
• Width 1: 3-5/8 in.
• Length: 11 in.
• Height 1: 6-1/2 in.
• Cap Height: 6-1/2 in.
• Gauge: 7
• Finish: Uncoated Steel
• Coating: None
• Install With: (4) 5/8 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 size is the Simpson CCO4/6 column cap designed to fit?

The CCO4/6 is designed for a nominal 4x or 3-1/2 in. beam width, making it compatible with standard dimensional lumber in that size category.

What fasteners are required to install the CCO4/6 column cap?

Installation requires four (4) 5/8 in. diameter machine bolts. Bolt spacing meets NDS code requirements to ensure optimal structural performance.

Why does the CCO4/6 feature a legless design?

The legless design of the CCO column cap allows for field-welded attachment directly to steel columns and posts, providing flexibility for structural connections in the field. Welding is performed by the designer.

What material and finish is used on the CCO4/6 column cap?

The CCO4/6 is made from 7-gauge uncoated steel with no applied coating or finish. It is manufactured in the United States and is intended for applications where the specifier has determined that coating is not required.

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