The Simpson ECC5 1/4-6HDG End Column Cap is an engineered steel connector built for end-of-beam column-to-beam connections in wood post-and-beam construction. Designed to accept a 5 1/8 in. beam and a 6X post, this hot dip galvanized column cap provides a reliable, corrosion-resistant solution for structural framing applications where load transfer, uplift resistance, and hardware longevity are critical priorities.

Key Features

• End-of-Beam Column Cap Design - Purpose-engineered for end-of-beam applications, ensuring proper load distribution from beam to post at connection points where standard caps fall short.
• 5 1/8 in. Beam and 6X Post Compatibility - Sized precisely for standard engineered lumber and dimensional lumber configurations, eliminating guesswork and ensuring a correct, secure fit.
• 3 Gauge Steel Construction - Heavy-gauge steel provides the structural integrity needed for demanding load-bearing applications in residential and commercial framing.
• Hot Dip Galvanized Finish - Full hot dip galvanization delivers robust corrosion resistance, making this connector well-suited for use with treated lumber and in outdoor environments such as decks, pergolas, and covered patios.
• Certified Welds - Engineered with certified welds for confidence in strength and load-carrying capacity throughout the connection.
• Enhanced Uplift Load Capacity - Increased uplift resistance addresses the demands of seismic zones and high-wind regions, providing structural reliability where conditions are most challenging.
• Machine Bolt Fastening - Connects via 3/4 in. machine bolts at both the beam and post, delivering a firm, predictable mechanical connection suited to engineered structural assemblies.

Why This Product

• Built for Corrosive and Demanding Environments - The hot dip galvanized finish makes this column cap a dependable choice for outdoor post-and-beam structures, treated lumber applications, and installations exposed to moisture or weather.
• Engineered for Seismic and High-Wind Performance - Enhanced uplift load capacity means this connector is ready for use in regions with strict structural requirements, offering peace of mind in high-stress building conditions.
• Precise Fit for Common Engineered Lumber - Designed specifically around a 5 1/8 in. beam and a 6X post, this cap integrates cleanly into standard framing layouts without modification or custom work.
• Domestic Manufacture from Simpson - Produced in the United States by Simpson, a trusted name in structural connectors, this end column cap carries the engineering confidence and quality control that structural framing projects demand.

Specifications

• Model Number: ECC5 1/4-6HDG
• Description: 5-1/8" Beam, 6X Post HDG End Column Cap
• Material: 3 Gauge Steel
• Finish: Hot Dip Galvanized (HDG)
• Fasteners Required: 3/4" Machine Bolts - Beam (2), Post (2)
• Width 1: 5-1/4 in.
• Width 2: 5-1/2 in.
• Length: 10-1/2 in.
• Height 1: 8-1/8 in.
• Country of Origin: United States

Approved Applications

• End-of-beam column-to-beam connections in wood construction
• Post-and-beam structural framing systems
• Structures requiring enhanced uplift resistance for seismic or high-wind conditions
• Applications requiring corrosion-resistant hardware, including use with treated lumber
• Outdoor structures, pergolas, decks, and covered patios utilizing 6X posts

What's Included

• 1x ECC5 1/4-6HDG End Column Cap
• Note: 3/4" Machine Bolts (Beam x2, Post x2) are required and not included.

Options

• Contact us for Configurable Options and Special orders
• Straps may be rotated 90 deg. (see SPECS)
• For special, custom or rough-cut lumber sizes, provide dimensions. An optional W2 dimension may be specified. (The W2 dimension on straps rotated 90 deg. is limited by the W1 dimension.)

Frequently Asked Questions

What beam and post sizes is the ECC5 1/4-6HDG designed for?

The ECC5 1/4-6HDG is designed for use with a 5-1/8" beam and a 6X post, making it suitable for standard engineered lumber and dimensional lumber framing configurations.

What fasteners are required to install this column cap?

Installation requires 3/4" machine bolts - two for the beam connection and two for the post connection. Fasteners are not included and must be sourced separately.

Why is a hot dip galvanized finish specified for this connector?

The hot dip galvanized (HDG) finish provides a thick, durable zinc coating that offers superior protection against corrosion, making it appropriate for outdoor, high-moisture, or treated-lumber environments where standard zinc finishes may be insufficient.