The Simpson ECCQ86SDS2.5 8x Beam 6x Post End Column Cap is a heavy-duty structural connector built for end-of-beam column-to-beam connections in wood construction. Engineered by Simpson for use with 8x beams and 6x posts, this end column cap features an extended seat that reaches beyond the side of the column, providing an enlarged bearing surface to help distribute loads effectively from the beam down through the post. All required 1/4" x 2-1/2" Strong-Drive SDS Heavy-Duty Connector Screws are included, so the connector arrives ready for a complete, reliable installation without the need to source additional fasteners.

Key Features

• End-of-beam column cap design for 8x beams and 6x posts - purpose-built geometry ensures a precise, secure fit at beam terminations in heavy timber framing, eliminating guesswork during layout and installation.
• Extended seat bearing surface beyond the column face - distributes beam loads across a greater contact area, reducing stress concentration and supporting stronger, more reliable connections in structural applications.
• 3-gauge steel construction - delivers the structural strength and rigidity required for demanding applications including earthquake and wind loading conditions where increased uplift resistance is needed.
• Simpson Strong-Tie Gray Paint finish - provides a consistent, clean appearance suited for exposed heavy timber framing while offering surface protection during and after installation.
• 28 Strong-Drive SDS Heavy-Duty Connector Screws included (14 beam, 14 post) - everything needed for a full installation is in the box, saving time and reducing the chance of fastener mismatches on the job site.
• SDS screws attach to a greater net section area of the column than bolt attachment - the result is a stronger, lower-profile connection that avoids the bulk and potential wood-splitting risks associated with traditional through bolts.
• Diamond holes allow for temporary fastening during positioning - lets installers hold the cap in place while making alignment adjustments before committing to the final screw pattern, improving accuracy and reducing errors.
• Certified weld connections for verified load performance - gives engineers and inspectors a documented basis for load calculations, supporting code-compliant structural designs in heavy timber framing projects.

Why This Product

• A complete, job-site-ready connection solution - the included 1/4" x 2-1/2" Strong-Drive SDS Heavy-Duty Connector Screws for both the beam and post mean no separate fastener orders, no compatibility concerns, and no delays getting the connection finished.
• Built specifically for the loads and dimensions of heavy timber framing - the ECCQ86SDS2.5 is sized and rated for 8x beams and 6x posts, making it a straightforward, dependable choice for timber frame structures, pergolas, and similar applications where structural integrity is non-negotiable.
• Lower-profile fastening without sacrificing strength - SDS screw attachment engages a greater net section area of the column compared to conventional bolt connections, delivering a cleaner look and a strong hold that suits both structural and aesthetically visible installations.
• Designed for seismic and wind-load applications - approved for structural connections requiring increased uplift resistance, this end column cap is a practical choice for projects in regions subject to earthquake or high-wind design requirements.

Specifications

• Manufacturer Part Number (MPN): ECCQ86SDS2.5
• Beam Width (W1): 7-1/2 in.
• Width 2: 5-1/2 in.
• Width 1: 7-1/2 in.
• Post Width (W2): 5-1/2 in.
• Length (L): 8-1/2 in.
• Height (H): 7 in.
• Material: 3-Gauge Steel
• Finish: Simpson Strong-Tie Gray Paint
• Fastener Type Included: 1/4" x 2-1/2" Strong-Drive SDS Heavy-Duty Connector Screws
• SDS Screws Included - Beam: 14
• SDS Screws Included - Post: 14
• Compatible Beam Size: 8x
• Compatible Post Size: 6x
• Country of Origin: United States

Approved Applications

• End-of-beam column cap connections in wood construction
• Structural connections requiring increased uplift resistance for earthquake or wind loading
• Heavy timber framing applications using 8x beams and 6x posts
• Projects requiring certified weld connections for verified load performance
• Installations where a lower fastener profile is preferred over traditional through bolts

What's Included

• 1 x ECCQ86SDS2.5 End Column Cap
• 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 diamond holes allow for temporary fastening during positioning before final installation. SDS screws attach to a greater net section area of the column than a bolt attachment normally entails, providing a stronger, lower-profile connection.

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

Frequently Asked Questions

What beam and post sizes is the ECCQ86SDS2.5 designed to work with?

The ECCQ86SDS2.5 is specifically engineered for use with an 8x beam and a 6x post, making it important to confirm your lumber dimensions match before installation.

What type of fasteners are required, and are they included?

This column cap uses 1/4" x 2-1/2" Strong-Drive SDS Heavy-Duty Connector screws for attachment. All required screws are included with the connector, so no separate hardware purchase is needed.

What is the advantage of using SDS screws over standard through bolts on this connector?

SDS screw attachment provides two key advantages over standard through bolts: the screws deliver a lower profile installation, and they engage a greater net section area of the column compared to standard bolt attachment, helping to maintain the structural integrity of the post.

What is this connector made from, and where is it manufactured?

The ECCQ86SDS2.5 is constructed from heavy-duty 3-gauge steel and finished in Simpson Strong-Tie Gray paint for corrosion resistance. It is manufactured in the United States.