The Simpson ECC3 1/4-4HDG End Column Cap is a heavy-duty structural connector from Simpson designed for end-of-beam column-to-beam connections in wood construction. Built to pair a 3-1/8 in. beam with a 4X post, this end column cap extends bearing surface beyond one side of the column to help distribute load effectively and create a solid, code-compliant structural connection. Its Hot Dip Galvanized finish makes it a dependable choice for outdoor, exposed, and corrosion-prone environments where long-term performance is critical.

Key Features

• 7-gauge steel construction - provides the structural mass and rigidity needed to handle demanding load transfer between beam and post without deformation over time.
• Hot Dip Galvanized finish - delivers superior corrosion resistance for use in outdoor, exposed, or harsh environments where standard finishes would break down.
• Certified welds - give installers confidence that every joint meets verified strength and loading standards, reducing risk in critical structural applications.
• Increased uplift load capacity - engineered to handle the additional forces imposed by seismic and high-wind loading conditions, making this cap suitable for earthquake- and wind-rated construction.
• Bolt spacing meets NDS code requirements - ensures the connection is compliant with nationally recognized design standards, simplifying inspections and approvals.
• Diamond holes for temporary fastening - allow the connector to be positioned and held in place during installation before final bolting, improving accuracy and ease of assembly.
• Fits 3-1/8 in. beam and 4X post - precise sizing ensures a proper, snug fit for standard engineered lumber and dimensional lumber in those dimensions, eliminating guesswork on the job site.

Why This Product

• Purpose-built for end-of-beam applications - unlike standard column caps, the extended bearing seat design of the ECC series is specifically configured for end-of-beam scenarios where load distribution geometry differs from mid-beam connections, making it the right tool for the application rather than a workaround.
• Rated for seismic and high-wind conditions - with uplift loads increased to address earthquake and wind loading, this connector is well suited for structures in regions with demanding environmental load requirements, adding a meaningful layer of safety to the overall assembly.
• American-made quality in a corrosion-resistant package - the combination of domestic manufacturing and a Hot Dip Galvanized finish means buyers get a connector built to consistent quality standards that is also ready for long-term exposure without early degradation.
• Straightforward installation with compliant fastener requirements - the use of standard 5/8 in. machine bolts and NDS-compliant bolt spacing keeps installation familiar and inspection-friendly, reducing complexity on the job site.

Specifications

• Model Number: ECC3 1/4-4HDG
• Description: 3-1/8" Beam, 4X Post HDG End Column Cap
• Material: 7 Gauge Steel
• Finish: Hot Dip Galvanized (HDG)
• Beam Size: 3-1/8"
• Post Size: 4X
• Required Fasteners: 5/8" Machine Bolts - Beam (2), Post (2)
• Width 1: 3-1/4 in.
• Width 2: 3-5/8 in.
• Length: 7-1/2 in.
• Height 1: 6-1/2 in.
• Country of Origin: United States

Approved Applications

• End-of-beam column-to-beam connections in wood construction
• Structural connections requiring load distribution from beam to post
• Applications subject to seismic (earthquake) loading conditions
• Applications subject to high-wind uplift loading conditions
• Outdoor or exposed environments requiring corrosion-resistant hardware

What's Included

• 1x Simpson Strong-Tie ECC3 1/4-4HDG End Column Cap
• Note: 5/8" Machine Bolts (Beam x2, Post x2) required - not included

• 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 ECC3 1/4-4HDG designed to fit?

This end column cap is designed for use with a 3-1/8" beam and a 4X post, making it suitable for standard engineered lumber and dimensional lumber applications in those sizes.

What fasteners are required to install this end column cap?

Installation requires 5/8" machine bolts - two for the beam connection and two for the post connection. The bolt spacing is designed to meet NDS code requirements for optimal performance.

Is this end column cap suitable for use in high-wind or seismic environments?

Yes. The ECC3 1/4-4HDG features increased uplift loads specifically to accommodate earthquake and wind loading conditions, making it appropriate for structural connections in seismic zones or areas subject to high-wind forces.

What material and finish does the ECC3 1/4-4HDG use, and why does it matter?

This end column cap is constructed from 7-gauge steel with a Hot Dip Galvanized (HDG) finish. The HDG finish provides enhanced corrosion resistance, making the connector well-suited for demanding structural environments where moisture or exposure could degrade standard finishes over time.