The Simpson ECCQ End Column Cap for 6x Beam, 6x Post with Strong-Drive SDS Screws is a Simpson Strong-Tie engineered connector built to deliver a high-capacity connection for column-beam combinations in end-of-beam applications. Fabricated from heavy-duty 7-gauge steel and finished in Simpson Strong-Tie gray paint, this end column cap is designed to meet the demands of structural wood framing where strength, reliability, and efficient installation matter. It ships with 1/4 in. x 2-1/2 in. Strong-Drive SDS Heavy-Duty Connector screws included, so contractors and builders can get to work without sourcing additional hardware.

Key Features

• Strong-Drive SDS screw installation - replaces traditional through bolts for faster fastening while preserving a greater net section area of the column, helping maintain structural integrity at the connection point
• Lower-profile connection design - SDS screws sit flush without protruding hardware, reducing clearance conflicts and delivering a cleaner finished appearance where aesthetics or tight tolerances matter
• 7-gauge steel construction - heavy-duty material thickness provides the load-bearing strength needed for demanding column-to-beam structural connections in residential and commercial framing
• Simpson Strong-Tie gray paint finish - a durable factory-applied coating that helps protect the connector during handling, installation, and service life
• SDS screws included - 1/4 in. x 2-1/2 in. Strong-Drive SDS Heavy-Duty Connector screws are packaged with the cap, eliminating a separate fastener purchase and keeping the job moving

Why This Product

• Trusted engineering behind every connection - Simpson Strong-Tie connectors are engineered and tested to perform to the highest quality standards, making this end column cap the go-to choice of engineers and contractors for structural wood framing applications
• Faster installation without sacrificing strength - Strong-Drive SDS screws drive quickly and provide a greater net section area at the column than standard through bolts, cutting labor time while supporting high-capacity loads
• Purpose-built for 6x post and beam framing - designed specifically for nominal 6x beam and 6x post combinations, this cap fits confidently into heavy timber framing, pergola, deck, and structural support applications without guesswork
• Complete and ready to install - the included SDS screws mean no trips for additional fasteners, giving builders everything needed to make a code-quality connection right out of the package

Specifications

• Model Number: ECCQ66SDS2.5
• Member Size (Beam): 6x beam
• Nominal Beam Width: 6x
• Beam Width (in.): 5-1/4, 5-1/2
• Width 2: 5-1/2 in.
• Width 1: 5-1/2 in.
• Height: 7 in.
• Length: 8-1/2 in.
• Dimension W1 (in.): 5-1/2
• Dimension W2 (in.): 5-1/2
• Dimension L (in.): 8-1/2
• Dimension H (in.): 7
• Material: 7-gauge steel
• Gauge: 7
• Finish/Coating: Simpson Strong-Tie Gray Paint
• Installation Fasteners: Install with 1/4 in. x 2-1/2 in. Strong-Drive SDS Heavy-Duty Connector screws (included)
• Country of Origin: United States

What's Included

Each pack contains (1) ECCQ66SDS2.5 Beam, 6x Post End Column Cap, 1/4 in. x 2-1/2 in. Strong-Drive SDS Heavy-Duty Connector screws.

Options

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

Downloads and Resources

• View Specifications

Frequently Asked Questions

Why use SDS screws instead of standard through bolts with the ECCQ66SDS2.5?

The Strong-Drive SDS Heavy-Duty Connector screws provide faster installation and attach to a greater net section area of the column compared to standard through bolts. They also create a lower profile connection, which can be important where clearance or aesthetics are a consideration.

What size beam and post is the ECCQ66SDS2.5 designed for?

This end column cap is designed for a nominal 6x beam and a 6x post, with beam widths of 5-1/4 in. and 5-1/2 in.

What material and finish is the ECCQ66SDS2.5 made from?

The ECCQ66SDS2.5 is manufactured from 7-gauge steel with a Simpson Strong-Tie gray paint finish, providing a durable, high-quality connector suited for structural wood construction applications.

Are fasteners included with the ECCQ66SDS2.5?

Yes. The connector includes 1/4 in. x 2-1/2 in. Strong-Drive SDS Heavy-Duty Connector screws needed for installation - no separate fastener purchase is required.

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