The Simpson ECCQ106SDS2.5 End Column Cap is a heavy-duty structural connector from Simpson designed for end-of-beam column-to-beam connections in wood construction. Built to fit 10x beam and 6x post lumber, this column cap features an extended seat bearing surface that projects beyond the side of the column to help distribute beam loads more effectively at the connection point. Included Strong-Drive SDS Heavy-Duty Connector screws engage a greater net section area of the column compared to standard through-bolt attachments, making this cap a reliable solution for post-and-beam framing, high-uplift structural applications, and projects where a low-profile fastener connection is required.

Key Features

• Extended seat bearing surface - projects beyond the column face to distribute beam load more effectively, reducing stress concentration at the connection point in post-and-beam assemblies.
• 3-gauge steel construction - provides the heavy-duty structural integrity needed for demanding column-to-beam connections subject to earthquake or wind loading.
• Includes Strong-Drive SDS Heavy-Duty Connector screws - fasteners engage a greater net section area of the column than through-bolt solutions, simplifying installation while maintaining strong, reliable performance.
• Compatible with 10x beam and 6x post lumber - engineered specifically for this lumber pairing, ensuring a precise, certified fit without custom modification.
• Diamond holes for temporary fastening - allow the cap to be positioned and held in place during alignment before final fastener installation, reducing the chance of misalignment on the job site.
• Simpson Strong-Tie Gray paint finish - provides a corrosion-resistant coating suited to the structural environments where column caps are commonly installed.
• Made in the United States - produced domestically to consistent quality standards for certified, engineered structural connector applications.

Why This Product

• Engineered for high-uplift demands - the ECCQ106SDS2.5 is approved for structural applications requiring increased uplift resistance, making it well suited for builds in earthquake- or wind-prone regions where connection performance is critical.
• No through-bolts required - the included SDS screw fastening system eliminates the need for through-bolt drilling, saving labor time while delivering a connection that engages more of the column's net section area.
• Purpose-built fit for 10x beam and 6x post connections - rather than a one-size-fits-many approach, this cap is sized and certified specifically for this lumber combination, giving builders confidence in the structural match without guesswork.
• Complete hardware included - the cap ships with all required Strong-Drive SDS screws for both the beam and post connections, so installers have everything needed to complete the connection without sourcing fasteners separately.

Specifications

• Model Number: ECCQ106SDS2.5
• Beam Width: 9-1/4 in.
• Width 2: 5-1/2 in.
• Width 1: 9-1/2 in.
• Height: 7 in.
• Length: 8-1/2 in.
• Dimension W1: 9-1/2 in.
• Dimension W2: 5-1/2 in.
• Dimension L: 8-1/2 in.
• Dimension H: 7 in.
• Material: 3-Gauge Steel
• Finish: Simpson Strong-Tie Gray Paint
• Fastener Type: 1/4" x 2-1/2" Strong-Drive SDS Heavy-Duty Connector Screws
• Country of Origin: United States

Approved Applications

• End-of-beam column-to-beam connections in wood construction
• Structural applications requiring increased uplift resistance for earthquake or wind loading
• Post-and-beam framing where extended bearing surface support is required
• Applications where a low-profile fastener connection is preferred over through-bolt solutions
• 10x beam and 6x post connections requiring a certified, engineered column cap

What's Included

• 14 x 1/4" x 2-1/2" Strong-Drive SDS Heavy-Duty Connector Screws (Beam)
• 14 x 1/4" x 2-1/2" Strong-Drive SDS Heavy-Duty Connector Screws (Post)

Installation

Fasten with 1/4" x 2-1/2" Strong-Drive SDS Heavy-Duty Connector screws, which are provided with the column cap. The extended seat of the column cap should be positioned to bear on the top of the column, with the cap aligned to support the end of the beam. Diamond holes are available for temporary fastening prior to final installation.

Options

• Contact us for Configurable Options and Special orders
  
• Straps may be rotated 90 deg.
  

Frequently Asked Questions

What beam and post sizes is the ECCQ106SDS2.5 designed to fit?

The ECCQ106SDS2.5 is engineered for use with a 10x beam and a 6x post. The beam width accommodated is 9-1/4 in., with a W1 dimension of 9-1/2 in. and a W2 dimension of 5-1/2 in., an L dimension of 8-1/2 in., and an H dimension of 7 in.

What fasteners are included, and why are they preferred over standard through bolts?

The ECCQ106SDS2.5 includes 1/4" x 2-1/2" Strong-Drive SDS Heavy-Duty Connector screws. These screws provide a lower profile than standard through bolts and attach to a greater net section area of the column than bolt attachment typically allows, resulting in a stronger and less obtrusive connection.

What material and finish is used on this column cap?

The ECCQ106SDS2.5 is fabricated from 3-gauge steel and features a Simpson Strong-Tie Gray paint finish, providing a durable heavy-duty construction suitable for demanding structural applications.

Is this column cap suitable for use in high-wind or seismic areas?

Yes. The ECCQ106SDS2.5 features certified welds and uplift loads that have been increased specifically to meet earthquake and wind loading demands, making it appropriate for use in applications where enhanced lateral and uplift resistance is required.