The Simpson SULC410 Concealed Joist Hanger Skewed Left for 4x10 Lumber is a purpose-built framing connector designed to support 4x members at a 45 deg. left angle in wood frame construction. Its U-shaped concealed header flange design keeps hardware hidden from view, making it a go-to choice for architecturally exposed framing where clean, finished lines matter as much as structural performance. Built by Simpson to meet the demands of both residential and commercial wood framing projects, this hanger delivers a reliable angled joist-to-header connection wherever a 45 deg. left-skewed solution is required.

Key Features

• 45 deg. Left Skew - Precisely engineered for framing members that meet the header at a 45 deg. left angle, providing a secure and accurate connection without field modification or guesswork.
• Concealed Header Flanges - The U-shaped design positions flanges out of the sightline during installation, resulting in clean, uncluttered framing lines ideal for exposed architectural conditions.
• 16-Gauge Steel Construction - Heavy-gauge steel delivers the structural strength needed to handle the load demands of 4x lumber in both residential and commercial applications.
• Zinc Galvanized G90 Coating - A G90 zinc galvanized finish provides corrosion resistance, helping the hanger hold up in the moisture-variable environments common in wood framing projects.
• Domestic Production - Manufactured in the United States, supporting consistent quality standards and reliable material sourcing for professional framing applications.
• Complementary Pairing with SURC - Designed as the left-skewed counterpart to the right-skewed SURC hanger, allowing both sides of an angled framing layout to be addressed with matched, compatible connectors.

Why This Product

• Built for Exposed Framing Conditions - The concealed header flange design is specifically suited to architecturally exposed applications where visible hardware is undesirable, eliminating the need for cover-up solutions or aesthetic compromises.
• Precision Angle, Zero Guesswork - A fixed 45 deg. left skew means the connection geometry is built into the hanger itself, reducing layout error and simplifying installation on angled joist-to-header assemblies.
• Matched System for Two-Sided Layouts - When used alongside the right-skewed SURC on the opposing side, the SULC410 enables a fully coordinated, symmetrical angled framing connection - ideal for hip roofs, diagonal deck framing, and similar configurations.
• American-Made Quality with G90 Corrosion Protection - Produced in the United States with a Zinc Galvanized G90 coating, this hanger is built to consistent quality standards and carries the corrosion resistance expected in long-term structural applications.

Specifications

• Specification: Value
• Model Number: SULC410
• Skew Direction: Left
• Skew Angle: 45 Degrees
• Gauge: 16
• W (Width): 3-9/16 in.
• H (Height): 8-1/2 in.
• B (Bearing): 2-5/8 in.
• Coating / Material: Zinc Galvanized, G90
• Fasteners Required: 16d Common Nails
• Country of Origin: United States

Approved Applications

• Supporting 4x members in wood frame construction where a 45-degree left-skewed connection is required
• Concealed framing connections in architecturally exposed conditions where visible hardware is undesirable
• Residential and commercial wood framing projects requiring angled joist-to-header connections
• Applications where the complementary right-skewed SURC hanger is used on the opposing side

What's Included

• 1 x Simpson SULC410 Concealed Joist Hanger (Skewed Left, 45 Degrees, for 4x10 member)
• Note: 16d common nails required for installation and are not included.

Installation Notes

• Fasteners required: 16d common nails
• Designed for use with 4x lumber members in wood construction
• Concealed header flanges are positioned during installation to remain hidden from the exposed face

Options

• Contact us for Configurable Options and Special orders

Frequently Asked Questions

What is the skew angle of the SULC410?

The SULC410 is skewed 45 degrees to the left. Its counterpart, the SURC, is skewed 45 degrees to the right. Both are otherwise identical in design and construction.

What size lumber member does the SULC410 support?

The SULC410 is designed to support 4x members in wood construction, with an interior width of 3-9/16 inches and a height of 8-1/2 inches to accommodate a 4x10 member.

What fasteners are required to install the SULC410?

Installation requires 16d common nails. Fasteners are not included with the hanger and must be sourced separately.

What coating does the SULC410 have, and where is it made?

The SULC410 features a Zinc Galvanized G90 coating for corrosion resistance. It is manufactured in the United States.