The Simpson HSULC410 is a 4x10 concealed flange joist hanger skewed left, engineered for precision 45 deg.-skewed timber connections in wood-frame construction. Built from 14-gauge steel with a Zinc Galvanized G90 coating, this heavy-duty U-shaped hanger delivers exceptional load-bearing performance while maintaining clean, finished aesthetics in exposed conditions. The concealed header flanges hide behind the structural member, eliminating visible hardware lines - ideal for architecturally exposed beam and joist assemblies. Manufactured in the United States, the HSULC410 is a reliable solution wherever a left-hand 45 deg.-skewed hanger connection is required for 4x10 lumber.

Key Features

• 45 deg. Left-Skewed Design: Engineered specifically to support 4x members skewed 45 deg. to the left, providing a precise and secure connection at non-perpendicular angles
• Concealed Header Flanges: Provides cleaner visible lines in exposed construction conditions by hiding the flange behind the header
• A2 (Acute) Flange Turned In: Accommodates end-of-wall installation for greater placement flexibility
• Encapsulates the Top Flange of the Joist: No web stiffeners are required for standard installation, simplifying the build process
• Obround Nail Holes on the Acute Side: Allows nails to be easily installed parallel to the joist, improving fastening efficiency
• Accommodates 40 deg. - 50 deg. Skew Range: These hangers will accommodate a 40 deg.- to 50 deg.-skewed joist for installation flexibility
• Cannot Be Modified: Factory-formed geometry ensures consistent, code-compliant performance - no field modifications permitted
• Heavy U-Shaped Construction: Robust 14-gauge steel profile provides superior strength and rigidity under load
• Zinc Galvanized G90 Coating: Provides corrosion resistance suitable for a wide range of interior and protected exterior applications
• Made in the USA: Manufactured in the United States for consistent quality and reliable performance

Specifications

• Model Number: HSULC410
• Skew Direction: Left (45 deg.)
• Joist Size: 4 x 10
• Gauge: 14
• Height: 8-1/2 in.
• Coating / Material: Zinc Galvanized, G90
• Country of Origin: United States

Approved Applications

• Supporting 4x members in wood-frame construction at a 45 deg. left-skewed angle
• End-of-wall joist and beam connections requiring concealed flange hardware
• Architecturally exposed framing where clean, hardware-free visible lines are desired
• Roof and floor framing assemblies requiring angled joist-to-header connections
• Applications requiring a 40 deg. - 50 deg. skewed connection without field modification

Installation Notes

• Required Fasteners: #9 x 2-1/2" Strong-Drive SD Connector screws OR 0.162" x 3-1/2" Nails
• Fill all round and obround nail holes with specified fasteners to achieve table loads
• Where noted, triangle holes in the joist flange may be filled for additional uplift capacity
• The joist end may be square cut or bevel cut
• These hangers cannot be modified but will accommodate a 40 deg.- to 50 deg.-skewed joist

Note: Product dimensions and/or sc

Frequently Asked Questions

What lumber size is the HSULC410 designed to support?

The HSULC410 is specifically engineered to support 4x10 lumber, making it suitable for standard 4x10 joist and beam applications in wood-frame construction.

What skew angle does this hanger accommodate, and in which direction?

This hanger is designed for a left-hand 45 deg. skew and will accommodate a range of 40 deg. - 50 deg. skewed joists, providing some flexibility for installations that are not exactly 45 deg.. It cannot be used as a right-hand skewed hanger.

Why are the header flanges described as "concealed," and when does that matter?

The concealed header flanges are designed to hide behind the structural member rather than remaining visible on the face of the header. This results in cleaner visible lines in exposed construction conditions, making the HSULC410 well suited for architecturally exposed beam and joist assemblies where visible hardware would be undesirable.

What material and finish is the HSULC410 made from?

The HSULC410 is constructed from 14-gauge steel with a Zinc Galvanized G90 coating, providing corrosion resistance suitable for heavy-duty structural applications.