The Simpson ECCQ3-6SDS2.5 ECCQ End Column Cap from Simpson Strong-Tie is engineered to deliver strong, reliable column-to-beam connections in end-of-beam applications in wood construction. Designed specifically for a 3-1/8 in. beam width and a nominal 6x post, this heavy-duty connector features an extended seat that provides additional bearing surface area beyond the side of the column, helping to distribute load from the beam and provide enhanced support at the connection point. Built from 7-gauge steel with a Simpson Strong-Tie gray paint finish, the ECCQ3-6SDS2.5 comes complete with 28 included 1/4 in. x 2-1/2 in. Strong-Drive SDS Heavy-Duty Connector screws - 14 for the beam and 14 for the post - for fast, efficient installation without the need for additional brackets or braces.

Key Features

• Strong-Drive SDS Heavy-Duty Connector screws included - 28 screws (14 beam, 14 post) are included in the box, so installation can begin immediately without sourcing fasteners separately.
• Lower-profile SDS screw fastening - SDS screws sit with a lower profile than standard through bolts, resulting in a cleaner finished appearance and reduced interference with surrounding materials.
• Extended seat bearing surface - the seat extends beyond the side of the column to distribute load more effectively across the connection, improving structural support at end-of-beam locations.
• Certified welds - weld certification provides verifiable confidence in the strength and load-carrying capacity of the connector, supporting compliance in structural applications.
• Increased uplift load capacity - uplift loads have been increased to address earthquake or wind loading requirements, making this cap suitable for demanding structural environments.
• Diamond holes for temporary fastening - allow the cap to be held in position during layout and alignment before final installation, reducing the chance of mispositioning.
• 7-gauge steel construction - heavy-gauge steel provides the structural integrity required for load-bearing column-to-beam connections in wood framing applications.
• Simpson Strong-Tie gray paint finish - factory-applied coating provides a consistent, clean appearance and a base level of protection suited to the connector's end use.

Why This Product

• A complete, ready-to-install connection solution - the ECCQ3-6SDS2.5 ships with all 28 required Strong-Drive SDS screws already included, eliminating the need to source or match fasteners separately and keeping the installation process straightforward.
• Engineered specifically for end-of-beam column connections - unlike general-purpose hardware, this cap is purpose-built for end-of-beam applications in wood construction, with an extended bearing seat that actively helps distribute load and support the connection where it is most needed.
• Built to handle uplift from wind and seismic loads - increased uplift load ratings make this connector a practical choice for structural projects in regions subject to earthquake or high-wind conditions, without requiring supplemental hardware.
• Eliminates the need for additional brackets or braces - Simpson Strong-Tie column caps are designed to handle the connection on their own across a variety of project sizes, simplifying the overall structural assembly and reducing material costs.

Specifications

• Model Number (MPN): ECCQ3-6SDS2.5
• Beam Width: 3-1/8 in.
• Nominal Post Size: 6x
• Member Size: 3-1/8 in. beam, 6x post
• Width 2: 5-1/2 in.
• Width 1: 3-1/4 in.
• Height: 7 in.
• Length: 8-1/2 in.
• Material: 7-Gauge Steel
• Finish / Coating: Simpson Strong-Tie Gray Paint
• Fastener Type: 1/4 in. x 2-1/2 in. Strong-Drive SDS Heavy-Duty Connector Screws
• Fasteners Included: 28 - (14) beam, (14) post
• Included Fastener Model: SDS25212
• 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
• Projects requiring heavy-duty column-beam connections without the need for additional brackets or braces
• Applications where a lower-profile fastener solution is preferred over standard through bolts

What's Included

• (1) Simpson Strong-Tie ECCQ3-6SDS2.5 End Column Cap
• (28) 1/4 in. x 2-1/2 in. Strong-Drive SDS Heavy-Duty Connector Screws (Model: SDS25212) - (14) for beam, (14) for post