The Simpson ECCQ66-SDS2.5HDG End Column Cap is engineered by Simpson Strong-Tie to deliver a high-capacity connection for 6x beam and 6x post column-beam combinations in wood construction end-of-beam applications. Fastened with included 1/4 in. x 2-1/2 in. Strong-Drive SDS Heavy-Duty Connector screws, this connector provides faster installation and attaches to a greater net section area of the column than standard through bolts. Built from 7-gauge steel with a Hot-Dip Galvanized finish, it is manufactured to the highest quality standards and engineered and tested to perform in demanding residential and commercial structural framing projects.

Key Features

• Strong-Drive SDS screw installation - Uses 1/4 in. x 2-1/2 in. Strong-Drive SDS Heavy-Duty Connector screws for faster installation compared to traditional bolt methods, so you spend less time on the connection and more time on the build.
• Greater net section area than bolts - SDS screws attach to a larger net section area of the column compared to standard through bolts, resulting in a stronger, more reliable column-beam connection.
• Low-profile finished connection - SDS screws produce a lower profile than standard through bolts, keeping the connection clean and unobtrusive in visible structural applications.
• 7-gauge steel construction - Heavy-gauge steel provides the structural rigidity and load capacity required for high-capacity column-beam combinations in both residential and commercial framing.
• Hot-Dip Galvanized finish - HDG coating offers extra corrosion resistance, making this end column cap well suited for exterior applications and use with pressure-treated lumber where standard coatings may fall short.

Why This Product

• Built for high-capacity structural connections - Specifically designed to handle demanding column-beam combinations, including applications requiring strong uplift resistance for earthquake or wind loading, giving builders and engineers confidence in critical connections.
• Corrosion resistance where it counts - The Hot-Dip Galvanized coating goes beyond standard finishes to protect against corrosion in exterior environments and when paired with pressure-treated wood, extending the service life of the connection.
• Engineered and tested by Simpson Strong-Tie - Designed to meet the quality standards and code-compliance requirements that engineers and contractors rely on for both residential and commercial structural framing projects.
• Screws included for a complete, job-ready connector - The package includes the required Strong-Drive SDS screws, so you have everything needed for a proper installation without a separate fastener order.

Specifications

• Model Number (MPN): ECCQ66-SDS2.5HDG
• Member Size: 6x beam
• Nominal Beam Width: 6x
• Beam Width: 5-1/4 in., 5-1/2 in.
• Dimension W1: 5-1/2 in.
• Dimension W2: 5-1/2 in.
• Dimension L: 8-1/2 in.
• Dimension H: 7 in.
• Material: 7-Gauge Steel
• Gauge: 7
• Finish / Coating: Hot-Dip Galvanized (HDG)
• Country of Origin: United States

Approved Applications

• End-of-beam column-beam connections in wood construction
• High-capacity column-beam combinations requiring strong uplift resistance for earthquake or wind loading
• Exterior applications requiring corrosion resistance
• Pressure-treated wood applications where enhanced corrosion resistance is needed
• Residential and commercial structural framing projects requiring code-compliant connectors

What's Included

• 1x Simpson Strong-Tie ECCQ66-SDS2.5HDG End Column Cap
• Includes 1/4 in. x 2-1/2 in. Strong-Drive SDS Heavy-Duty Connector screws - Beam (14), Post (14)

Installation

Install with 1/4 in. x 2-1/2 in. Strong-Drive SDS Heavy-Duty Connector screws (included). SDS screws provide faster installation and attach to a greater net section area of the column compared to standard through bolts, while also delivering a lower-profile finished connection.

Options

• Contact us for Configurable Options and Special orders
  

Frequently Asked Questions

What beam and post sizes is the ECCQ66-SDS2.5HDG designed to fit?

This end column cap is designed for use with a 6x beam and a 6x post, making it specifically suited for 6x column-beam combinations in wood construction end-of-beam applications.

What fasteners are used to install this column cap, and are they included?

The ECCQ66-SDS2.5HDG is installed with 1/4 in. x 2-1/2 in. Strong-Drive SDS Heavy-Duty Connector screws, which are included with the connector. These SDS screws allow for faster installation, attach to a greater net section area of the column compared to standard bolts, and provide a lower profile than standard through bolts.

Why is the Hot-Dip Galvanized finish important for this connector?

The Hot-Dip Galvanized (HDG) coating provides extra corrosion resistance, making this connector well suited for exterior applications and use with treated wood, where standard coatings may not offer adequate protection against moisture and chemical exposure.

What material and gauge is this end column cap made from?

The ECCQ66-SDS2.5HDG is manufactured from 7-gauge steel, providing a strong and durable construction that delivers a high-capacity connection for column-beam combinations.