Description

Key Features

Built for 6x Members

The Simpson Strong-Tie ECCLL666 L-Shape End Column Cap is sized for a 6x main beam, 6x side beam, and 6x post. That gives you a purpose-built connection for end-of-beam layouts instead of trying to piece together a workaround in the field.

Certified Weld Strength

Certified welds and code-compliant bolt spacing matter here because this connector is carrying real structural load. You get a cleaner path to a strong wood-to-wood beam and post connection.

Left-Hand L Layout

This ECCLL666 version is the skewed-left model for L-shaped beam intersections at the top of a column. Order direction matters on connectors like this, so the left-hand layout helps match the framing plan without field modification.

Overview

The Simpson Strong-Tie ECCLL666 L-Shape End Column Cap is a structural wood connector designed for end-of-beam applications where two beams intersect in an L shape on top of a column. This is a column cap designed for wood-to-wood post and beam connections. Model Number: ECCLL666. If you are framing a layout with a 6x main beam, 6x side beam, and 6x post, this cap gives you a dedicated way to tie that joint together with the proper geometry already built in.

What makes this connector matter is that it is not a generic cap. The ECCLL666 is specifically configured for a left-direction, L-shape end condition. On jobs where a beam dies into the top of a post and a second beam intersects from the side, the connector layout has to match the framing plan. Getting that right saves rework and helps keep the connection in line with the engineer’s details. Simpson Strong-Tie also calls out bolt spacing that meets NDS code requirements, which is the kind of detail that matters when the connection has to perform, not just look finished.

The body is steel with a 7-gauge thickness listed for this size, and the connector uses certified welds for strength and loading confidence. That is a big deal on a post cap like this because the weld quality is part of what makes the assembled connector act like one unit under load. Simpson also adds diamond holes for temporary fastening, which sounds like a small feature until you are trying to hold parts in place during layout and install. It gives the crew a little help before the permanent fasteners go in.

From a practical jobsite standpoint, this connector is meant for real structural framing work, not finish carpentry. It is used in wood construction where you need a strong beam-to-post connection and a cleaner way to handle intersecting members at the top of a column. The gray paint finish provides the standard Simpson Strong-Tie finish for this model, and the product is also noted by Simpson as being available in hot-dip galvanized versions depending on corrosion needs. For the listed ECCLL666, the finish provided in the supplied data is Simpson Strong-Tie gray paint.

Installation details are straightforward but important. Simpson specifies using all required fasteners and notes that bolt holes should be a minimum of 1/32 inch and a maximum of 1/16 inch larger than bolt diameter per the cited NDS guidance. Lowes also lists this model for installation with 5/8 inch diameter bolts. That gives buyers a clear picture of the hardware scale involved and reinforces that this is a substantial connector for serious timber and heavy framing connections.

The Simpson Strong-Tie ECCLL666 L-Shape End Column Cap is best suited for builders, framers, deck crews, and contractors working on post-and-beam structures, covered outdoor structures, and other wood framing assemblies where an L-shaped beam intersection lands on a 6x post. If your plan calls for a left-hand configuration, this connector is the right kind of specialized part to order up front. If the layout is mirrored, you need the right-hand version instead of trying to make this one fit.

Made for L-Shaped Beam Intersections

This connector is built for a specific framing problem: when two beams meet at the top of a post in an L configuration. Instead of piecing together a custom solution, you get a purpose-shaped cap that matches the connection style the plan calls for.

• Designed for end-of-beam applications with two beams intersecting in an L on top of a column
• Left-direction configuration for layouts that require the skewed-left orientation

Heavy Steel Where the Load Is

The connector itself is the selling point here. The 7-gauge steel construction and certified welds tell you this part was built for structural duty, not light trim work or cosmetic brackets.

• Made from steel with 7-gauge thickness listed for this size
• Certified welds are called out by Simpson for strength and loading confidence

Cleaner Layout and Easier Positioning

Good connectors do more than hold wood together. They help the crew place parts correctly and keep the connection aligned with the plan. The diamond holes and defined bolt layout make this easier to stage and install.

• Diamond holes provide temporary fastening during setup
• Bolt spacing is designed to meet NDS code requirements

What’s in the Box

• (1) Simpson Strong-Tie ECCLL666 End Column Cap

Bolts are not included in the supplied product data.

Key Specifications

Tool Type	L-shape end column cap
Material	Steel
Gauge	7 gauge
Finish	Simpson Strong-Tie gray paint
Main Beam Size	6x nominal
Side Beam Size	6x nominal
Post Size	6x nominal
Bolt Diameter	5/8 in
Actual Width	11.842 in
Actual Depth	9.5 in
Weight	19.27 lbs
Materials Connected	Wood to wood

Built For

Wood Construction Post and Beam Framing End-of-Beam Connections L-Shaped Beam Layouts Structural Carpentry General Contracting

Pro Tip

Double-check the plan orientation before you order. The ECCLL666 is the left-direction version, so if the beam layout is mirrored in the field, you need the right-direction ECCLR model instead.

Warranty & Support

Limited lifetime warranty.

Tool Nut’s Take

Tool Nut’s Take

Simpson Strong-Tie ECCLL666 L-Shape End Column Cap for Planned Structural Work

If your framing plan calls for a left-hand L-shaped beam connection on a 6x post, this is exactly the kind of connector you want to buy once and install once.

• Who it’s for: Builders and framing crews handling structural wood connections with 6x beams and posts.
• Why it stands out: It is purpose-built for this exact connection style, with certified welds, 7-gauge steel, and code-minded bolt spacing.
• Worth knowing: Orientation is not optional here. This is the skewed-left version, so confirm the layout before you place the order.

Common Questions

• What is the Simpson Strong-Tie ECCLL666 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 it fit? The supplied product data lists this model for a 6x main beam, 6x side beam, and 6x post.
• Is this the left or right version? This is the left-direction, skewed-left version. Simpson notes that ECCLR is the right-direction option.
• What size bolts does it use? Lowes lists installation with 5/8 inch diameter bolts.