The Simpson ECCO4 End Column Cap is engineered for strong, reliable column-to-beam connections in end-of-beam applications on top of steel members. Its legless design allows for field-welded attachment directly to steel columns and beams, giving crews on-site flexibility without compromising structural performance. The seat of the cap extends beyond one side of the column, providing additional bearing surface area that helps distribute load from the beam and reinforce the connection. Built from heavy-duty uncoated 7-gauge steel and sized for nominal 4x or 3-1/2 in. beam widths, this end column cap is a dependable choice for structural applications where earthquake or wind uplift loads are a design consideration.

Key Features

• Increased uplift load capacity for earthquake or wind loading - helps the connection meet the higher demands of seismic and high-wind design requirements, reducing the need for supplemental hardware.
• Bolt spacing that meets NDS code requirements - ensures the connection performs to code without requiring additional engineering workarounds on the job site.
• Diamond holes for temporary fastening - allow the cap to be held in position during installation, making alignment easier and improving efficiency before final fastening.
• Sized for nominal 4x or 3-1/2 in. beam width with a cap height of 4 in. - provides a precise, secure fit for common structural beam dimensions used in end-of-beam column connections.
• Legless design for field-welded attachment - enables direct welding to steel columns and beams in the field, eliminating the need for additional brackets or braces in many applications.
• Made from uncoated 7-gauge steel - delivers the heavy-duty strength and structural integrity required for demanding load-bearing connections.

Why This Product

• Purpose-built for end-of-beam steel column connections - the ECCO4 is specifically designed for end-of-beam applications on top of steel members, making it a targeted solution rather than a generic bracket adapted for the task.
• Simplifies installation with a field-weld-ready, legless profile - the cap attaches directly to steel columns and beams by welding in the field, giving structural teams a straightforward connection method that generally eliminates the need for additional brackets or braces.
• Enhanced load distribution through an extended seat - the seat of the cap reaches beyond one side of the column, spreading the beam load over a greater bearing surface and reinforcing the integrity of the connection where it counts most.
• Designed to perform in high-demand seismic and wind environments - with uplift loads increased for earthquake or wind loading and bolt spacing that meets NDS code requirements, this end cap is suited for projects where building codes demand elevated connection performance.

Specifications

• Manufacturer Part Number (MPN): ECCO4
• Member Size: 4x, 3-1/2 in.
• Cap Height: 4 in.
• Gauge: 7-gauge steel
• Finish: Uncoated Steel
• Coating: None
• Installation Fastener: (1) 5/8 in. diameter machine bolt
• Country of Origin: United States

Approved Applications

• End-of-beam column-to-beam connections on top of steel members
• Field-welded attachment to steel columns and beams
• Structural connections requiring increased uplift load resistance for earthquake or wind loading
• Applications requiring NDS code-compliant bolt spacing
• Connections involving nominal 4x or 3-1/2 in. width beams

Installation

• Install with (1) 5/8 in. diameter machine bolt
• 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

• 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.

Frequently Asked Questions

What beam size is the ECCO4 designed to fit?

The ECCO4 is designed for nominal 4x or 3-1/2 in. beam widths, with a cap height of 4 in.

How is the ECCO4 attached to steel columns and beams?

The ECCO4 features a legless design that enables field-welded attachment directly to steel columns and beams. Once in place, it is installed using one 5/8 in. diameter machine bolt.

What is the ECCO4 made of, and does it have a protective coating?

The ECCO4 is made from 7-gauge steel with no coating or finish applied. It is uncoated steel, so users should consider their environment when determining if additional corrosion protection is needed.

What makes the ECCO4 suitable for earthquake or wind loading applications?

The ECCO4 is engineered with increased uplift load capacity for earthquake or wind loading conditions. Its bolt spacing meets NDS code requirements for optimal performance, and the extended seat provides additional bearing surface area beyond one side of the column to help distribute load from the beam and reinforce the connection.