The Simpson ECCQ3-4SDS2.5 End Column Cap is a heavy-duty structural connector engineered by Simpson to deliver high-capacity connections between a 3-1/8 in. wide beam and a 4x post in end-of-beam wood construction applications. Built from 7-gauge steel and finished in Simpson Strong-Tie gray paint, this column cap is designed and tested to meet the demanding performance standards trusted by engineers and contractors on projects requiring genuine structural strength and building code compliance. Included 1/4 in. x 2-1/2 in. Strong-Drive SDS Heavy-Duty Connector screws make this a complete, ready-to-install solution for glulam or engineered lumber beam assemblies.

Key Features

• Strong-Drive SDS screw installation - included 1/4 in. x 2-1/2 in. Strong-Drive SDS Heavy-Duty Connector screws drive faster than traditional through bolts, reducing installation time and labor on the job site
• Greater net section area of the column compared to bolts - SDS screws attach without removing as much material as bolt holes do, preserving more of the column's structural cross-section for a stronger overall connection
• Lower profile fastener design - SDS screws sit closer to the surface than standard through bolts, resulting in a cleaner, less obtrusive finished appearance
• 7-gauge steel construction - heavy-gauge steel provides the structural rigidity and load capacity needed for demanding column-beam connection applications
• Simpson Strong-Tie gray paint finish - factory-applied coating helps protect the connector and is consistent with other Simpson connectors for a uniform look across the structure

Why This Product

• A complete, install-ready connector - the SDS screws are included with the column cap, so there is no need to source compatible fasteners separately before starting the installation
• Engineered for high-capacity structural performance - designed specifically for end-of-beam column-beam combinations, this connector delivers the load transfer and connection integrity that engineers and contractors rely on for code-compliant wood construction
• Faster installation without sacrificing strength - Strong-Drive SDS screws drive quickly and engage more of the column's net section area than bolt-based alternatives, giving builders both efficiency and structural confidence in a single solution
• Proven quality from a trusted connector manufacturer - Simpson products are engineered, tested, and manufactured to high quality standards, making this column cap a dependable choice for residential and commercial structural projects alike

Specifications

• Model Number: ECCQ3-4SDS2.5
• Beam Width: 3-1/8 in.
• Width 2: 3-5/8 in.
• Width 1: 3-1/4 in.
• Height: 7 in.
• Length: 8-1/2 in.
• Post Size: 4x
• Material: 7-Gauge Steel
• Finish / Coating: Simpson Strong-Tie Gray Paint
• Install With: 1/4 in. x 2-1/2 in. Strong-Drive SDS Heavy-Duty Connector Screws (included)

Approved Applications

• End-of-beam column-beam connections in wood construction
• High-capacity structural connections requiring a low-profile fastener solution
• Projects requiring compliance with building codes for seismic or wind uplift loading
• Applications where greater net section area of the column is required compared to standard bolt connections

What's Included

• 1 x Simpson Strong-Tie ECCQ3-4SDS2.5 End Column Cap
• 1/4 in. x 2-1/2 in. Strong-Drive SDS Heavy-Duty Connector Screws (included with the column cap)

Installation

Fasten with the included 1/4 in. x 2-1/2 in. Strong-Drive SDS Heavy-Duty Connector screws. The SDS screws drive quickly for efficient installation and attach to a greater net section area of the column than standard bolt attachment, while maintaining a lower profile for a cleaner finished look.

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 ECCQ3-4SDS2.5 designed to work with?

This end column cap is specifically designed for use with a 3-1/8 in. wide beam and a 4x post configuration, making it suited for engineered lumber or glulam beam applications in wood construction.

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

The ECCQ3-4SDS2.5 installs with 1/4 in. x 2-1/2 in. Strong-Drive SDS Heavy-Duty Connector screws, which are included with the connector. These screws provide faster installation and a lower profile compared to standard through bolts, while also offering a greater net section area of the column.

What material and finish is the ECCQ3-4SDS2.5 made from?

This end column cap is manufactured from 7-gauge steel and finished in Simpson Strong-Tie gray paint, providing both structural strength and a clean, professional appearance suitable for exposed applications.

What advantages does this connector offer over a standard column cap that uses through bolts?

The ECCQ3-4SDS2.5 uses Strong-Drive SDS screws instead of standard through bolts, which results in a lower-profile connection and preserves a greater net section area of the column. Additionally, the extended seat bearing surface helps distribute load from the beam, and the design supports increased uplift loads for earthquake or wind loading applications.