Description

Key Features

Built from 7-Gauge Steel

This Simpson Strong-Tie column cap uses heavy 7-gauge steel for structural wood-to-wood beam and post connections. That matters when the connection is carrying real load and you want the hardware to match the job.

Certified Welded Strength

Certified welds give you confidence in strength and loading. It is a practical detail, but on structural connectors, weld quality is the whole game.

Right-Hand L Configuration

The ECCLR666 is made for end-of-beam applications where two 6x beams intersect in an L on top of a 6x post, with the side bucket oriented to the right. That saves field work and helps keep the connection aligned with the plan.

Overview

Simpson Strong-Tie ECCLR666 L-Shape End Column Cap is a structural wood connector for end-of-beam framing where two beams meet in an L shape on top of a column. This is a column cap designed for wood-to-wood beam-to-post connections. Model Number: ECCLR666. It is built for a 6x main beam, 6x post, and 6x side beam, with the side stirrup configured in the right-hand direction.

The real value here is that this connector solves a tricky framing condition with a purpose-built part instead of piecing together multiple brackets or site-made hardware. Simpson Strong-Tie designed the ECCL series for end-of-beam applications when two beams intersect over a post, and this specific ECCLR666 version handles that layout in a right-hand configuration. If your plan calls for the side beam on the opposite side, you would need the left-hand version instead.

On the material side, the ECCLR666 is made from 7-gauge steel and uses certified welds. That is the kind of spec that matters because a column cap is only as trustworthy as the steel thickness and the weld quality holding the geometry together. Simpson Strong-Tie also calls out bolt spacing that meets NDS code requirements, which helps support proper load transfer when the connector is installed as specified.

This connector includes diamond holes for temporary fastening, which is one of those small details you appreciate once you are actually setting heavy members in place. It helps hold alignment while you work through the final bolting sequence. For installation, Simpson Strong-Tie specifies 5/8-inch-diameter bolts for this model, and the bolt holes should be sized a minimum of 1/32 inch to a maximum of 1/16 inch larger than the bolt diameter per the listed NDS guidance.

The finish on this version is Simpson Strong-Tie gray paint. For interior framing or protected conditions, that gives you the standard factory-finished connector most builders expect. The ECCL family is also available in hot-dip galvanized versions, but finish should always match the exposure conditions and plans for the job.

From a design standpoint, this is not a universal catch-all bracket. It is a geometry-specific structural cap for a known framing layout. That is a good thing. When you are tying a main beam and side beam into the top of a post, a connector made for that exact condition is usually the cleaner, safer route than trying to make a general bracket do specialized work. The defined member sizing, right-hand orientation, and beam-to-post layout are what make the ECCLR666 useful.

The Simpson Strong-Tie ECCLR666 L-Shape End Column Cap makes the most sense for carpenters, framers, post-and-beam builders, deck builders, and general contractors working from engineered plans. If you are building a structural beam intersection over a 6x post and need a right-hand L-shaped cap, this is the right kind of hardware. If your layout, exposure conditions, or handedness differ, double-check the exact model before ordering because orientation and sizing matter here.

Built for L-Shaped Beam Intersections

This connector is made for a very specific framing problem: two beams meeting at the top of a post in an L configuration. Using a dedicated end column cap keeps the connection cleaner, more predictable, and easier to plan around than mixing several separate brackets.

• Designed for end-of-beam applications when two beams intersect on top of a column
• Nominal member sizes for this model are 6x main beam, 6x post, and 6x side beam

Details That Matter During Installation

Good structural hardware should make layout and fastening more straightforward, not more confusing. The ECCLR666 adds practical touches that help on the job while still staying true to the engineered connection.

• Certified welds are called out for strength and loading confidence
• Diamond holes provide temporary fastening during setup and alignment

Key Specifications

Connector Type	L-Shape End Column Cap
Model	ECCLR666
Material	7-gauge steel
Finish	Simpson Strong-Tie gray paint
Materials Connected	Wood to wood
Nominal Main Beam Size	6x
Nominal Post Size	6x
Nominal Side Beam Size	6x
Fastener Requirement	5/8 in diameter bolts
Actual Depth	9.5 in
Actual Width	11.842 in
Weight	19.27 lbs
Direction	Right
Application	End-of-beam, wood-to-wood beam-to-post connection

Compatibility

Framing Material

Designed for wood-to-wood connections.

Member Sizing

Sized for a 6x main beam, 6x post, and 6x side beam.

Fasteners

Install with 5/8-inch-diameter bolts as specified.

Orientation

This is the right-hand version. For the opposite layout, use the left-hand ECCLL version.

Built For

Carpentry Construction Deck Building Post and Beam Framing Structural Wood Connections General Contracting

Pro Tip

Before you order, stand where the post will be and confirm which side the intersecting beam lands on. With parts like the ECCLR666, getting the right-hand versus left-hand orientation wrong is the kind of mistake that costs time fast.

Warranty & Support

Limited lifetime warranty.

Tool Nut’s Take

Tool Nut’s Take

Simpson Strong-Tie ECCLR666 L-Shape End Column Cap Gets Specific for a Reason

If your plans call for a right-hand L-shaped beam-to-post connection, this is the kind of connector you buy once and install with confidence.

• Who it’s for: Framers, deck builders, and contractors handling structural wood connections with a 6x post and intersecting 6x beams.
• Why it stands out: Heavy 7-gauge steel, certified welds, code-conscious bolt spacing, and a geometry built specifically for end-of-beam L intersections.
• Worth knowing: This is a handed part. Double-check right versus left before checkout, and make sure your fastener schedule matches the plans.

Common Questions

• What is the ECCLR666 used for? It is used for end-of-beam applications where two wood beams intersect in an L shape on top of a wood column or post.
• What member sizes does this model fit? This model is sized for a 6x main beam, 6x post, and 6x side beam.
• Is this the right-hand or left-hand version? ECCLR666 is the right-hand version. Simpson Strong-Tie identifies ECCLL as the left-hand version.
• What fasteners does it use? The listed installation requirement is 5/8-inch-diameter bolts, with bolt holes sized per the stated NDS guidance.
• What finish does this version have? This version is listed with a Simpson Strong-Tie gray paint finish.