The Simpson ECCQ48-SDS2.5HDG End Column Cap is a heavy-duty connector built for end-of-beam column-to-beam connections in wood construction, designed specifically to pair a 4x beam with an 8x post. Fabricated from 7-gauge steel with a hot-dip galvanized finish, this end column cap delivers reliable load transfer and corrosion resistance for structural post and beam framing, including applications where enhanced uplift resistance is required for seismic or high-wind loading conditions. It ships complete with Strong-Drive SDS Heavy-Duty Connector screws for both the beam and post connections, so crews can move straight to installation without sourcing additional hardware.

Key Features

• Extended Bearing Seat - provides additional bearing surface beyond the side of the column, helping to distribute loads from the beam effectively and supporting the integrity of the connection at end-of-beam positions.
• 7-Gauge Steel Construction - delivers heavy-duty structural strength suited for demanding post and beam framing applications where connection integrity under load is critical.
• Hot-Dip Galvanized Finish - provides superior corrosion resistance, making this column cap well suited for outdoor, exposed, or moisture-prone environments where long-term durability matters.
• Includes Strong-Drive SDS Heavy-Duty Connector Screws - 14 screws for the beam and 14 for the post are included in the package, enabling fast, efficient installation without the need for additional through bolts or separate fastener purchases.
• Approved for Seismic and High-Wind Applications - engineered to meet enhanced uplift resistance requirements, giving builders and engineers confidence in connections located in earthquake-prone or high-wind regions.
• Fits 4x Beam and 8x Post - purpose-built sizing means no guesswork on compatibility, ensuring a precise fit for the specific lumber dimensions common in heavy timber and structural framing projects.

Why This Product

• One Package, Ready to Install - with 28 Strong-Drive SDS Heavy-Duty Connector screws included (14 for the beam, 14 for the post), this end column cap arrives job-ready, reducing trips to the supply house and keeping installations on schedule.
• Built for High-Demand Structural Conditions - approved for applications requiring enhanced uplift resistance under both seismic and high-wind loading, this connector supports code-compliant framing in the most demanding environmental conditions.
• Corrosion Resistance Where It Counts - the hot-dip galvanized finish goes beyond standard zinc coatings to protect the connector in exposed or outdoor settings, helping preserve structural performance over the long term.
• Trusted Simpson Engineering for a Critical Connection Point - end-of-beam column caps are among the most load-sensitive connections in post and beam construction, and this Simpson connector is purpose-engineered for exactly that application, giving builders and engineers a reliable, tested solution.

Specifications

• Model Number: ECCQ48-SDS2.5HDG
• Beam Width: 3-1/2 in.
• Dimension W1: 3-5/8 in.
• Dimension W2: 7-1/2 in.
• Dimension L: 8-1/2 in.
• Dimension H: 7 in.
• Material: 7-Gauge Steel
• Finish: Hot-Dip Galvanized (HDG)
• Fasteners Included: 1/4" x 2-1/2" SDS Screws - Beam (14), Post (14)
• Country of Origin: United States

Approved Applications

• End-of-beam column-to-beam connections in wood construction
• Post and beam structural framing connections
• Applications requiring enhanced uplift resistance for seismic (earthquake) loading
• Applications requiring enhanced uplift resistance for high-wind loading conditions

Options

• Contact us for Configurable Options and Special orders

Frequently Asked Questions

What beam and post sizes is the ECCQ48-SDS2.5HDG designed to fit?

This end column cap is designed for use with a 4x beam and an 8x post, making it suitable for heavy-duty wood construction applications where those specific lumber dimensions are used.

What fasteners are included, and do I need to purchase additional hardware?

The ECCQ48-SDS2.5HDG comes complete with 1/4" x 2-1/2" Strong-Drive SDS Heavy-Duty Connector screws - 14 for the beam and 14 for the post - so no additional through bolts or fasteners are required for installation.

What material and finish does this column cap use, and is it suitable for outdoor or exposed applications?

This column cap is fabricated from 7-gauge steel with a hot-dip galvanized finish, which provides superior corrosion resistance, making it well suited for outdoor and exposed wood construction environments where moisture and the elements are a concern.

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

The extended bearing seat projects beyond the side of the column, distributing beam loads across a greater surface area at the connection point. This design helps support the integrity of the connection and provides reliable load transfer in end-of-beam applications.