The Simpson CCO4 CCO Column Cap (No Legs) for 4x Beam by Simpson Strong-Tie is engineered to deliver strong, reliable column-to-beam connections on top of steel columns and posts. The legless design allows for field-welded attachment directly to steel columns, giving contractors and designers flexibility in steel column applications where a welded connection is preferred or required. The seat of the column cap extends beyond each side of the column to provide additional bearing surface area, helping to distribute beam loads evenly and support the overall connection. Built from 7-gauge uncoated steel, this column cap is a dependable hardware solution for structural wood-to-steel connections in demanding construction environments.

Key Features

• Uplift loads increased for earthquake or wind loading - provides enhanced resistance during high-stress seismic or wind events, helping protect the structural connection when it matters most.
• Bolt spacing that meets NDS code requirements - ensures the connection performs to recognized engineering standards, supporting compliance with applicable building codes and reducing fieldwork guesswork.
• Diamond holes for temporary fastening - allows the cap to be held in position during installation before final fastening, making alignment easier and improving jobsite efficiency.
• Sized for nominal 4x or 3-1/2 in. beam width - compatible with standard dimensional lumber in that size range, simplifying material selection and reducing the risk of fitment errors.
• Cap height of 4 in. - provides a defined, consistent bearing depth that supports proper load transfer from beam to column.
• Made from 7-gauge uncoated steel - delivers substantial material thickness for structural strength in heavy-load column cap applications where durability is required.

Why This Product

• Field-weld flexibility for steel column connections - the legless cap-only design is specifically intended for welded attachment to steel columns and posts, making it well suited for steel-frame construction projects where traditional leg-style connectors are not practical.
• Engineered for code-compliant performance - bolt spacing meets NDS code requirements and uplift load values are increased for seismic and wind loading, giving designers and inspectors the confidence that the connection is built to recognized structural standards.
• Extended seat for improved load distribution - the bearing seat reaches beyond each side of the column, spreading the load from the beam across a greater surface area and reducing concentrated stress at the connection point.
• Installs with standard machine bolts - designed for use with two 5/8 in. diameter machine bolts, allowing the column cap to work with readily available fasteners and keeping the installation process straightforward.

Specifications

• MPN: CCO4
• Brand: Simpson Strong-Tie
• Member Size: 4x, 3-1/2 in.
• Width 1: 3-5/8 in.
• Length: 7 in.
• Height 1: 4 in.
• Cap Height: 4 in.
• Gauge: 7
• Finish: Uncoated Steel
• Coating: None
• Install With: (2) 5/8 in. diameter machine bolts (sold separately)

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

Frequently Asked Questions

What beam width is the CCO4 designed to support?

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

Why does the CCO4 column cap have no legs?

The legless design of the CCO4 allows for field-welded attachment directly to steel columns and posts, offering greater flexibility in steel column applications where a welded connection is preferred or required.

How does the CCO4 perform under earthquake or high-wind conditions?

The CCO4 features increased uplift load capacity specifically to address the demands of earthquake and wind loading, helping to maintain structural integrity under these dynamic forces.

What fasteners are required to install the CCO4?

Installation of the CCO4 requires (2) 5/8 in. diameter machine bolts. Diamond holes are also provided on the cap to allow for temporary fastening during the installation process, and bolt spacing meets NDS code requirements for optimal performance.

Downloads and Resources

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

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