The Simpson ECCQ66SS-SDS2.5 is a 6x6 End Column Cap crafted from 7-gauge stainless steel, engineered to deliver strong, reliable column-to-beam connections in end-of-beam wood construction applications. Designed for demanding structural environments, this end column cap features an extended seat that provides additional bearing surface area beyond the side of the column, helping to distribute loads effectively from the beam to the post. Paired with 1/4" x 2-1/2" Strong-Drive SDS Heavy-Duty Connector screws - included in the package - this cap offers fast installation with a low-profile finish that outperforms traditional through-bolt methods. The stainless steel construction makes it well-suited for corrosive or high-moisture environments where long-term structural integrity is essential.

Key Features

• Extended Bearing Seat: The seat of the column cap extends beyond the side of the column to distribute beam loads across a greater surface area, enhancing connection support.
• SDS Screw Compatibility: Uses Strong-Drive SDS Heavy-Duty Connector screws for fast installation and attachment to a greater net section area of the column compared to standard bolt attachment.
• Low-Profile Fastening: SDS screws provide a lower profile than standard through bolts, resulting in a cleaner, more streamlined installation.
• Certified Welds: Certified welds provide confidence in strength and load performance across connection points.
• Increased Uplift Load Capacity: Uplift loads have been increased to accommodate earthquake or wind loading requirements.
• Diamond Holes: Diamond-shaped holes allow for temporary fastening during installation, simplifying the process.
• 7-Gauge Stainless Steel Construction: Provides robust structural performance with a stainless steel finish suited for corrosion-resistant applications.
• Made in the United States: Domestically manufactured for quality assurance.

Specifications

• Model Number (MPN): ECCQ66SS-SDS2.5
• 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 Stainless Steel
• Finish: Stainless Steel
• Fastener Size: 1/4" x 2-1/2" SDS Heavy-Duty Connector Screws
• Country of Origin: United States

Approved Applications

• End-of-beam column-to-beam connections in wood construction
• Structural framing connections requiring high uplift resistance for seismic (earthquake) loading
• Structural framing connections requiring high uplift resistance for wind loading
• Applications requiring corrosion-resistant hardware, such as coastal or high-moisture environments
• 6x6 post and beam construction where extended bearing surface support is required

What's Included

• 1x ECCQ66SS-SDS2.5 End Column Cap (Stainless Steel)
• 14x 1/4" x 2-1/2" Strong-Drive SDS Heavy-Duty Connector Screws (Beam)
• 14x 1/4" x 2-1/2" Strong-Drive SDS Heavy-Duty Connector Screws (Post)

Options

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

Frequently Asked Questions

What size column is this end column cap designed for?

This column cap is specifically designed for 6x6 wood posts, as indicated by the "66" in the model name ECCQ66SS-SDS2.5.

What fasteners are required, and are they included?

This cap uses 1/4" x 2-1/2" Strong-Drive SDS Heavy-Duty Connector screws, which are included in the package. No additional fasteners need to be purchased separately for installation.

Why is stainless steel used for this column cap, and what gauge is it?

The cap is constructed from 7-gauge stainless steel, making it well-suited for corrosive or high-moisture environments where long-term structural integrity is essential. Stainless steel provides greater resistance to corrosion compared to standard steel, which is important in exterior or coastal applications.

What is the advantage of using SDS screws over traditional through bolts with this cap?

SDS screws offer faster installation and attach to a greater net section area of the column compared to standard bolt attachment. They also provide a lower profile than standard through bolts, resulting in a cleaner, more streamlined finished appearance.