The Simpson ECCQ64HDG-SDS End Column Cap delivers a high-capacity connection for 6x beam and 4x post column-beam combinations in end-of-beam wood construction. Engineered and tested to meet the highest quality standards, this connector is the trusted choice of engineers and contractors for projects requiring reliable strength and building code compliance. Included 1/4 in. x 2-1/2 in. Strong-Drive SDS Heavy-Duty Connector screws are ready to install straight out of the box, pairing speed and a clean, low-profile finish with the structural performance that demanding exterior and treated-wood applications require.

Key Features

• Strong-Drive SDS screw installation - provides faster installation than traditional bolt connections and preserves a greater net section area of the column, maintaining structural integrity where it matters most
• Low-profile SDS fastening system - eliminates the protruding hardware of standard through bolts, resulting in a cleaner finished appearance with no compromise to holding strength
• 7-gauge steel construction - heavy-gauge material delivers the rigidity and load capacity needed for high-demand column-beam connections in structural wood applications
• Hot-dip galvanized (HDG) coating - provides extra corrosion resistance specifically suited for exterior environments and applications involving pressure-treated lumber, extending the service life of the connection
• Fasteners included - 1/4 in. x 2-1/2 in. Strong-Drive SDS Heavy-Duty Connector screws for both beam and post come in the package, so installation can begin immediately without sourcing additional hardware

Why This Product

• Built for exterior and treated-wood jobsites - hot-dip galvanization goes beyond standard coatings to resist corrosion in the conditions where column-beam connections are most vulnerable, making this cap a dependable long-term solution for outdoor structures
• Engineered and tested by Simpson Strong-Tie - this connector is manufactured to the highest quality standards and is designed to perform in structures requiring compliance with building codes, including those in earthquake or high-wind zones
• Faster installation without sacrificing performance - Strong-Drive SDS screw technology eliminates the need for through bolts, reducing installation time while delivering a greater net section area of the column and a lower-profile result
• Everything needed arrives in one package - the included SDS screws for both the beam and post connections mean no trips back to the supply house, keeping the project moving efficiently from the moment the connector is in hand

Specifications

• Model Number: ECCQ64HDG-SDS
• Manufacturer Part Number (MPN): ECCQ64HDG-SDS
• Member Size (Beam): 6x Beam
• Post Size: 4x Post
• Beam Width: 5-1/4 in. / 5-1/2 in.
• Dimension W1: 5-1/2 in.
• Dimension W2: 3-5/8 in.
• Dimension L: 8-1/2 in.
• Dimension H: 7 in.
• Material: 7-Gauge Steel
• Coating / Finish: Hot-Dip Galvanized (HDG)
• Fasteners Included: 1/4 in. x 2-1/2 in. Strong-Drive SDS Heavy-Duty Connector Screws - Beam (14), Post (14)
• Country of Origin: United States

Approved Applications

• End-of-beam column-to-beam connections in wood construction
• High-capacity column-beam combinations using 6x beams and 4x posts
• Exterior applications where corrosion resistance is required
• Applications involving pressure-treated lumber requiring enhanced corrosion protection
• Structures requiring compliance with building codes in earthquake or high-wind zones

What's Included

• 1 x Simpson Strong-Tie ECCQ64HDG-SDS End Column Cap
• 1/4 in. x 2-1/2 in. Strong-Drive SDS Heavy-Duty Connector Screws (Beam: 14, Post: 14)

Installation

• Fasten with the included 1/4 in. x 2-1/2 in. Strong-Drive SDS Heavy-Duty Connector screws
• SDS scr

Options

• Contact us for Configurable Options and Special orders

Frequently Asked Questions

What beam and post sizes is the ECCQ64HDG-SDS designed to work with?

This end column cap is engineered for use with a 6x nominal beam width and a 4x post, making it specifically suited for 6x beam and 4x post column-beam combinations in end-of-beam wood construction applications.

What fasteners are required for installation, and are they included?

The ECCQ64HDG-SDS installs using 1/4 in. x 2-1/2 in. Strong-Drive SDS Heavy-Duty Connector screws, which are included with the connector. These SDS screws provide faster installation and a lower profile compared to standard through-bolt connections, while also offering a greater net section area of the column compared to bolts.

Is this connector suitable for exterior or treated-wood applications?

Yes. The ECCQ64HDG-SDS features a Hot-Dip Galvanized (HDG) finish, which provides extra corrosion resistance, making it well suited for exterior environments and applications involving treated wood.

What material and gauge of steel is used in this connector?

This end column cap is constructed from 7-gauge steel, providing heavy-duty structural performance for high-capacity column-beam connections.