The Simpson ECCQ46SS-SDS2.5 4x Beam 6x Post End Column Cap is a stainless steel structural connector engineered for end-of-beam column-to-beam connections in wood construction. Built by Simpson from 7-gauge stainless steel, this end column cap is designed to handle the demands of post and beam framing systems where a 4x beam meets a 6x post, delivering reliable load transfer and uplift resistance in applications exposed to seismic loading, high-wind conditions, and high-moisture or outdoor environments. The seat of the column cap provides an additional bearing surface that extends beyond the side of the column, helping distribute beam loads and supporting a stronger, more stable connection. Included Strong-Drive SDS Heavy-Duty Connector screws make installation straightforward without the need for through bolts.

Key Features

• 7-gauge stainless steel construction - provides the structural thickness and corrosion resistance needed for long-term performance in outdoor, coastal, and high-moisture environments where standard carbon steel hardware would degrade.
• Extended seat bearing surface - the seat projects beyond the side of the column to distribute the beam load across a greater area, reducing stress concentration and improving the integrity of the connection.
• Sized for 4x beam and 6x post applications - precisely engineered dimensions match standard 4x beam and 6x post framing members, so the connector fits without field modification or guesswork.
• Elevated uplift resistance - rated for structural applications requiring resistance to both seismic and high-wind loading, making this connector appropriate for projects in demanding code environments.
• Includes all required Strong-Drive SDS Heavy-Duty Connector screws - arrives complete with the fasteners needed for both the beam and post connections, so installation can begin immediately without sourcing hardware separately.
• Low-profile SDS screw installation - the included screws engage a greater net section area of the column than standard through bolts while keeping a lower profile, supporting structural performance without bulky hardware.
• Made in the United States - domestically produced under Simpson quality standards, consistent with the brand's engineering and manufacturing practices.

Why This Product

• One connector, complete hardware included - the ECCQ46SS-SDS2.5 ships with all Strong-Drive SDS screws for both the beam and post connections, eliminating a separate fastener order and keeping the installation process simple and self-contained.
• Purpose-built for corrosive environments - the all-stainless steel material and finish make this column cap a practical choice for outdoor structures, covered patios, pergolas, and coastal builds where moisture exposure is a real concern and longevity matters.
• Engineered for code-sensitive structural loads - designed specifically for applications requiring elevated uplift resistance under seismic and high-wind conditions, this connector supports compliance with structural requirements in high-demand building zones.
• Trusted Simpson engineering for post and beam framing - the ECCQ46SS-SDS2.5 comes from a brand with a deep history in structural connectors, giving builders and engineers confidence that the product is designed and tested for the loads and conditions it is rated to handle.

Specifications

• Model Number: ECCQ46SS-SDS2.5
• Beam Width: 3-1/2 in.
• Dimension W1: 3-5/8 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 Type: 1/4" x 2-1/2" Strong-Drive SDS Heavy-Duty Connector Screws
• Country of Origin: United States

Approved Applications

• End-of-beam column-to-beam connections in wood construction
• Structural applications requiring elevated uplift resistance for seismic (earthquake) loading
• Structural applications requiring elevated uplift resistance for high-wind loading
• Post and beam framing systems using 4x beams and 6x posts
• Outdoor and high-moisture environments where corrosion-resistant stainless steel hardware is required

What's Included

• 1x ECCQ46SS-SDS2.5 Stainless Steel End Column Cap
• 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)

Installation

Fasten with the included 1/4" x 2-1/2" Strong-Drive SDS Heavy-Duty Connector screws, which are provided with the column cap. A total of 14 screws are used for the beam connection and 14 screws are used for the post connection. The SDS screws deliver a low-profile installation compared to standard through bolts while engaging a greater net section area of the column for enhanced structural performance.

Options

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

Frequently Asked Questions

What beam and post sizes is the ECCQ46SS-SDS2.5 designed to fit?

This end column cap is designed specifically for use with a 4x beam and a 6x post, making it suitable for heavy-duty wood construction connections where those lumber dimensions are used.

What material and gauge is this column cap made from?

The ECCQ46SS-SDS2.5 is fabricated from 7-gauge stainless steel with a stainless steel finish, providing strong corrosion resistance for demanding structural and environmental conditions.

Are fasteners included, and what type are they?

Yes, the column cap arrives complete with all required 1/4" x 2-1/2" Strong-Drive SDS Heavy-Duty Connector screws. These screws provide a lower profile than standard through bolts and attach to a greater net section area of the column than a bolt attachment normally provides.

What is the purpose of the extended bearing seat on this column cap?

The seat of the column cap provides an additional surface area of bearing that extends beyond the side of the column. This helps distribute the load from the beam more effectively and provides superior support for the connection in end-of-beam applications.