The Simpson 4x10 Concealed Flange Joist Hanger Skewed Left HSULC410 is a purpose-built connector designed to support 4x10 lumber at a precise left-hand 45 deg. skew in wood-frame construction. Its concealed flange design keeps header hardware hidden behind the structural member, delivering clean sight lines in architecturally exposed framing without sacrificing structural integrity. Whether the application calls for angled floor joist connections, roof framing assemblies, or end-of-wall beam seats, this hanger arrives ready to install with no field modification required for connections ranging from 40 deg. to 50 deg. skew.

Key Features

• 45 deg. Left-Skewed Configuration - Matches angled framing layouts precisely, eliminating the guesswork and risk of adapting a straight or right-hand hanger to a left-skewed joist connection.
• Concealed Header Flanges - Flanges tuck behind the structural member so no hardware is visible from the front, making this hanger the right choice for exposed beam and joist assemblies where appearance matters.
• 40 deg. to 50 deg. Skew Tolerance - Accommodates a 10 deg. range of field variation without any modification to the hanger, reducing installation complications when framing angles are not perfectly on the mark.
• 14-Gauge Steel with G90 Zinc Galvanized Coating - Heavy-gauge construction paired with a corrosion-resistant finish supports demanding load requirements while standing up to the moisture exposure common in framing environments.
• Square Cut or Bevel Cut Joist End Accepted - Installers can use either cut style, adding flexibility during layout and trimming without compromising the connection.
• Compatible with Specified Fasteners Only - Engineered for use with #9 x 2-1/2 in. Strong-Drive SD Connector screws or 0.162 in. x 3-1/2 in. nails, ensuring load table values are met when all holes are filled as directed.

Why This Product

• Built for a Specific, Hard-to-Source Connection - Left-hand skewed hangers for 4x10 lumber are a specialty item, and this Simpson hanger is engineered exactly for that geometry, sparing contractors from costly field workarounds or custom fabrication.
• Clean Aesthetics Without Compromise - The concealed flange profile hides fastening hardware from view, making this connector a practical fit for exposed architectural framing where visible brackets would detract from the finished look.
• Reliable Simpson Engineering - Simpson connectors are designed with defined load values and strict fastener requirements, giving builders and inspectors a clear, testable standard to work from on every installation.
• Domestic Production - This hanger is a product of United States manufacturing, supporting consistent quality standards and availability for domestic construction projects.

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.