Description

Key Features

L-Shape Load Support

Built for end-of-beam connections where two 6x beams meet on top of a 6x post in an L formation. The extended seat gives the connection more bearing area, which helps distribute load where it matters.

Heavy Steel Build

Heavy-gauge steel construction, certified welds, and a painted finish give this column cap the strength and durability needed for structural framing connections.

Faster SDS Install

The Simpson Strong-Tie ECCLLQ666SDS L-Shaped End Column Cap includes Strong-Drive SDS connector screws, so installation is faster and lower profile than a typical through-bolt setup.

Overview

The Simpson Strong-Tie ECCLLQ666SDS L-Shaped End Column Cap is a structural column cap made for connecting two 6x beams to a 6x post in an end-of-beam L-shaped layout. This is a column cap designed for column-to-beam structural support in post-and-beam framing. Model Number: ECCLLQ666SDS. If you are building or reinforcing a beam intersection at the top of a post, this connector is made to give that joint a stronger, more stable load path than piecing a connection together in the field.

What makes this model matter is the way it handles a real framing connection. The ECCLLQ design is intended for situations where two beams intersect in an L formation on top of a column, which is a common condition in decks, pavilions, pergolas, and other heavy wood framing. The extended column seat adds surface area under the supported members, helping spread the load more effectively across the connection instead of concentrating it at a smaller point.

Installation is another big advantage here. Simpson pairs this connector with Strong-Drive SDS heavy-duty connector screws, which are included. That means you get a faster install than a traditional bolt-only setup, and you avoid the bulkier profile that can come with through-bolts. On the job, that saves time and simplifies alignment while still giving you a purpose-built structural connection.

The connector itself is made from steel with a gray paint finish and uses certified welds for added confidence in strength and loading. That matters because this is not decorative hardware. It is built for structural support, and the weld quality is part of what separates a dedicated connector like this from a fabricated field solution. Diamond holes are also built in to allow temporary fastening during setup, which makes positioning easier before final fastening goes in.

This left-direction version is specifically intended for skewed-left framing orientation. That detail is important. With structural connectors, orientation is not a small detail you sort out later. You need the correct left or right configuration for the beam layout you are framing. If your layout mirrors this one, you would need the opposite hand version instead.

From a practical standpoint, the Simpson Strong-Tie ECCLLQ666SDS L-Shaped End Column Cap is best suited for builders, framing crews, deck contractors, and serious timber or post-and-beam installers who want a cleaner engineered connection for 6x members. It also fits retrofit work where an upgraded beam-to-post connection is needed, provided the framing layout matches the product design. If you are working with 6x posts and 6x beams and need a left-hand end column cap with included SDS screws, this is the right kind of hardware for the job.

Built for L-Shaped Beam Intersections

This connector is made for a specific framing condition, and that is exactly why it works so well. Instead of forcing a general bracket into a structural role, you get a column cap designed around two beams intersecting at the top of a post.

• Designed for nominal 6x main beam, 6x side beam, and 6x post connections
• Made for end-of-beam applications where beams meet in an L formation
• Left-hand orientation for skewed-left framing layouts

Faster Structural Fastening

The included SDS screws are a real jobsite benefit. They help speed up installation and keep the connection profile lower than a standard through-bolt approach, which can make layout and assembly cleaner.

• Includes Simpson Strong-Drive SDS connector screws
• Faster installation compared to bolts based on the provided product data
• Diamond holes help with temporary fastening during positioning

Made for Structural Duty

This is structural connector hardware, not light-duty angle stock. The steel body, certified welds, and extended seat are all there to support the joint and improve load distribution in real framing applications.

• Steel construction with gray paint finish
• Certified welds for strength and increased uplift load values
• Extended column seat adds bearing surface area

What’s in the Box

• (1) Simpson Strong-Tie ECCLLQ666SDS L-Shaped End Column Cap
• (1) Set of Simpson Strong-Drive SDS connector screws

Key Specifications

Material	Steel
Finish	Gray Paint
Beam Size	6x
Post Size	6x
Orientation	Skewed Left
Mounting Type	Corner Mount
Dimensions	16 x 9.84 x 15.67 in
Weight	19.5 lbs

Compatibility

Primary Framing Size

Designed for nominal 6x beams and a nominal 6x post.

Connection Type

Made for wood column-to-beam end connections where two beams intersect in an L-shaped layout.

Fastener System

Uses Simpson Strong-Drive SDS heavy-duty connector screws, which are included with this model.

Built For

Construction Carpentry Post-and-Beam Framing Deck Framing Pergolas and Pavilions Structural Beam Connections New Construction Retrofit Work

Pro Tip

Double-check the beam direction before you order. This is the left-hand version, so if your framing layout is mirrored, you need the right-hand model instead. During setup, use the diamond holes to hold alignment before driving the SDS screws home.

Tool Nut’s Take

Tool Nut’s Take

Simpson Strong-Tie ECCLLQ666SDS L-Shaped End Column Cap for serious post-and-beam work

This is the kind of connector you buy when you want the framing connection solved correctly, not improvised with a pile of generic brackets and bolts.

• Who it’s for: Builders, deck crews, and framing contractors working with 6x posts and 6x beams in a left-hand L-shaped beam intersection.
• Why it stands out: It combines a purpose-built seat, certified welds, and included SDS connector screws, which makes the connection stronger and the install more straightforward.
• Worth knowing: Orientation matters here. This is not a universal cap, and that is a good thing if your layout matches it. Just make sure you are ordering the correct left-hand version for the job.

Common Questions

• What is this connector designed to do? It is designed to create a strong column-to-beam connection in an end-of-beam application where two beams meet in an L formation on top of a post.
• What lumber sizes does it fit? The provided product data lists compatibility with nominal 6x main beam, 6x side beam, and 6x post members.
• Are the installation screws included? Yes. This model includes Simpson Strong-Drive SDS connector screws.
• Is this the left or right version? This is the skewed-left version. If the framing layout requires the opposite hand, you would need the right-direction model instead.
• What is it made from? The product data lists steel construction with a gray paint finish.