The Simpson End Column Cap for 5-1/8 Inch Beam Legs Omitted ECCO5 1/4 is an engineered structural connector from Simpson designed for end-of-beam column-to-beam connections on top of steel members. Built in a legs-omitted configuration for field-welded attachment to steel columns and beams, this end cap delivers a clean, high-strength connection at beam ends where conventional leg-based hardware is not practical. Its generously proportioned seat extends beyond one side of the column to provide additional bearing surface area, effectively distributing beam loads and reinforcing connection integrity in demanding structural framing applications.

Key Features

• Legs-omitted design for field-welded connections - purpose-built for direct attachment to steel columns and beams, giving installers a clean, unobstructed connection at beam ends without pre-formed legs getting in the way.
• Extended seat beyond the column face - increases bearing surface area to distribute beam loads more effectively, reducing stress concentration at the connection point.
• Heavy-duty 3-gauge steel construction - provides the structural mass and rigidity required for load transfer, uplift resistance, and performance under earthquake or wind loading conditions.
• Simpson Strong-Tie Gray Paint finish - delivers a consistent, professional appearance while providing a baseline level of surface protection suited to interior structural framing environments.
• Compatible with engineered wood beams - broadens application scope beyond dimensional lumber, though coordination with engineered wood manufacturers is recommended for specific connection guidance.
• Supports NDS-compliant bolt spacing requirements - helps project teams meet code-referenced fastener placement standards without requiring custom modifications to the connector.

Why This Product

• Built specifically for end-of-beam scenarios on steel - unlike general-purpose column caps, this connector is engineered for the precise condition of beam ends sitting atop steel members, making it a targeted solution rather than a workaround.
• Field-weld flexibility without compromising structural performance - the legs-omitted format allows qualified installers and engineers to weld the cap directly to steel in the field, accommodating real-world framing conditions that prefabricated leg configurations cannot always address.
• Engineered for high-load and seismic applications - the heavy-gauge steel construction and extended bearing seat are well-suited to structural connections where increased uplift resistance for wind or earthquake loading is a project requirement.
• Domestic manufacturing - produced in the United States, supporting quality consistency expectations for projects where origin of fabricated structural hardware is a consideration.

Specifications

• Model Number: ECCO5 1/4
• Manufacturer Part Number (MPN): ECCO5 1/4
• Beam Width: 5-1/8 in.
• Dimension W1: 5-1/4 in.
• Dimension L: 10-1/2 in.
• Dimension H1: 8-1/8 in.
• Material: 3-Gauge Steel
• Finish: Simpson Strong-Tie Gray Paint
• Country of Origin: United States

Approved Applications

• End-of-beam column-to-beam connections on top of steel members
• Field-welded connections to steel columns and beams (legs-omitted configuration)
• Structural framing applications requiring increased uplift resistance for earthquake or wind loading
• Connections involving engineered wood beams - contact engineered wood manufacturers for specific connection guidance
• Applications where NDS-compliant bolt spacing is required for structural performance

Installation

• Use all specified fasteners for the connection as required by the project design.
• 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 involving engineered wood products.
• Welding to steel columns and beams shall be performed by a qualified designer or engineer.

Options

• Contact us for Configurable Options and Special orders
• For special, custom, or rough-cut lumber sizes, provide dimensions.

Frequently Asked Questions

What does "legs omitted" mean for the ECCO5 1/4, and how does it affect installation?

The legs-omitted design means the column cap does not include the typical leg extensions found on standard column caps. This configuration is purpose-built for field-welded attachment directly to steel columns and beams, resulting in a streamlined installation process and a clean structural profile at the connection point.

What size beam is the ECCO5 1/4 designed to accommodate?

The ECCO5 1/4 is designed for use with 5-1/8" beam legs, making it suitable for structural applications involving beams of that specific dimension.

What material and finish is used on the ECCO5 1/4?

The ECCO5 1/4 is manufactured from heavy-duty 3-gauge steel and finished in Simpson Strong-Tie Gray paint, providing a durable construction suited for demanding structural environments.

What design features help this column cap perform in high-load or seismic conditions?

The ECCO5 1/4 features an extended seat that reaches beyond one side of the column to distribute beam loads more effectively, increased uplift load capacity to address earthquake and wind loading demands, NDS-compliant bolt spacing for code-compliant structural performance, and diamond holes that allow for temporary positioning during installation.