The Simpson HDG End Column Cap for 5-1/8 Inch Beam with Legs Omitted is built for end-of-beam column-to-beam connections on top of steel members, delivering reliable structural support at some of the most demanding connection points in a build. Designed for field-welded attachment to steel columns and beams - including pipe columns and other steel column configurations - this legless cap gives qualified welders and designers the flexibility to achieve code-compliant connections across a wide range of structural applications, from new construction framing to seismic and high-wind retrofit projects.

Key Features

• Legless design for field-welded attachment - allows direct welding to steel columns and beams, giving designers and welders precise control over connection placement without pre-fabricated leg constraints
• Extended seat with increased bearing surface - distributes beam loads beyond one side of the column, improving structural integrity at critical end-of-beam connection points
• Hot Dip Galvanized finish on heavy-duty 3-gauge steel - provides corrosion resistance suited for exposed or demanding environments while maintaining the strength needed for structural load transfer
• Compatible with pipe columns and other steel column configurations - broadens the range of projects this cap can serve, reducing the need for custom fabricated alternatives
• Supports NDS code-compliant bolt spacing - helps projects meet structural code requirements, reducing the risk of inspection delays or connection failures
• Increased uplift load resistance - engineered to perform in seismic and high-wind conditions, making it a dependable choice for structurally demanding installations

Why This Product

• Purpose-built for end-of-beam steel connections - unlike general-purpose column caps, this fitting is specifically engineered for end-of-beam applications on top of steel members, so it fits the application without compromise or workarounds
• Field-weld flexibility for complex or non-standard column types - the legless configuration and compatibility with pipe columns and other steel column forms means this cap adapts to job-site conditions rather than dictating them
• Domestic production behind every connector - each cap carries the Simpson name and is produced in the United States, supporting confidence in consistent material quality and manufacturing standards
• Engineered for seismic and high-wind uplift demands - with increased uplift load resistance built into the design, this cap is a practical choice for projects in regions with strict lateral and wind load requirements, not just standard gravity load applications

Specifications

• Model Number: ECCO5 1/4HDG
• 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: Hot Dip Galvanized
• 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
• Structural applications requiring increased uplift load resistance for seismic or high-wind conditions
• Connections to pipe columns or other steel column configurations via field welding
• Projects requiring NDS code-compliant bolt spacing

Installation

• Use all specified fasteners.
• 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.
• Field welding to be performed by a qualified designer or welder.

Options

• Contact us for Configurable Options and Special orders
• For special, custom, or rough-cut lumber sizes, provide dimensions.
• ECCO may be ordered for field welding to pipe or other columns. Weld by designer.

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

Frequently Asked Questions

What type of application is the ECCO5 1/4HDG designed for?

The ECCO5 1/4HDG is designed specifically for end-of-beam applications where the column cap sits on top of steel members. Its legless design allows field-welded attachment to steel columns and beams, making it well suited for end-of-beam connection points in both new construction and retrofit applications.

Why does this column cap have a legless design?

The legless design enables field-welded attachment directly to steel columns and beams, providing versatility in end-of-beam applications where traditional leg-style connectors would not be appropriate or practical.

What material and finish does the ECCO5 1/4HDG use, and why does it matter?

The ECCO5 1/4HDG is constructed from 3-gauge steel with a Hot Dip Galvanized finish. The heavy-gauge steel delivers exceptional strength and durability, while the Hot Dip Galvanized finish provides superior corrosion resistance for long-term performance in demanding environments.

How does the extended seat on the ECCO5 1/4HDG benefit structural connections?

The extended seat provides additional bearing surface area beyond one side of the column, which effectively distributes beam loads across a wider area and delivers reliable structural support at critical connection points. Additionally, uplift loads are increased to enhance structural resilience against earthquake or wind loading.