The Simpson HSULC410Z 4x10 Concealed Flange Joist Hanger Skewed Left ZMAX is a heavy-duty, 45 deg. skewed hanger engineered by Simpson to support 4x10 joist members in wood-frame construction where angled framing connections are required. Its concealed flange, heavy U-shaped design keeps header flanges out of sight, making it a practical choice for exposed architectural framing where clean, finished lines matter as much as structural performance. Built to accommodate joist connections within a 40 deg. to 50 deg. skew range, this hanger delivers reliable, code-relevant support for left-skewed installations in both residential and commercial projects.

Key Features

• 45 deg. Left Skew Design - purpose-built for angled joist-to-header connections that require a left skew, eliminating the need for field modifications and keeping the framing process efficient.
• Concealed Flange, Heavy U-Shape Construction - header flanges stay hidden once installed, producing cleaner visible lines in exposed framing conditions where finished appearance is a priority.
• 40 deg. to 50 deg. Skew Range Accommodated - provides built-in tolerance around the nominal 45 deg. angle, giving framers practical flexibility when field conditions are not perfectly precise.
• 14-Gauge Steel with ZMAX Coating - the heavier gauge delivers the structural strength needed for 4x10 members, while the ZMAX coating provides enhanced corrosion resistance in demanding environments.
• Accepts Square Cut or Bevel Cut Joist Ends - compatible with both cut types, reducing extra labor at the saw and keeping installation straightforward on the job site.
• Sized Specifically for 4x10 Joist Members - the hanger is matched precisely to this lumber dimension, ensuring a secure, consistent fit without guesswork during installation.
• Made in the United States - domestic manufacturing supports consistent quality standards that professional framers and contractors can rely on across projects.

Why This Product

• Engineered for a Specific, Difficult Connection - skewed joist-to-header connections at 45 deg. left are among the more challenging framing details; this hanger is built exactly for that scenario, removing the need for improvised or field-fabricated solutions.
• Concealed Flanges Serve Both Structure and Aesthetics - unlike standard open-flange hangers, the concealed design keeps metal out of the sightline in exposed conditions, making it suitable for architecturally visible framing without sacrificing load capacity.
• Trusted Simpson Quality on a Complex Detail - produced by Simpson, a brand with deep roots in structural connector engineering, this hanger brings proven design standards to a connection type where accuracy and reliability are non-negotiable.
• Flexible Fastener Compatibility for Rated Performance - rated loads can be achieved using either Strong-Drive SD Connector screws or standard nails, giving installers the option to use the fastener type that best suits their tools and workflow.

Specifications

• Model Number: HSULC410Z
• Skew Direction: Left (45 deg.)
• Joist Size: 4 x 10
• Gauge: 14
• Height: 81/2 in.
• Coating / Material: ZMAX
• Hanger Style: Concealed Flange, Heavy U-Shape
• Skew Range Accommodated: 40 deg. to 50 deg.
• Country of Origin: United States

Approved Applications

• Angled joist-to-header connections in wood-frame construction requiring a 45 deg. left skew
• Support of 4x structural members at skewed framing angles
• End-of-wall installations where the A2 acute flange turned-in design is required
• Exposed framing conditions where concealed flanges deliver a cleaner finished appearance
• Applications requiring joist connections within a 40 deg.- to 50 deg.-skew range
• Residential and commercial wood-frame structural framing projects

Installation Information

Proper fasteners are required for rated load performance. Use #9 x 21/2" Strong-Drive SD Connector screws OR 0.162" x 31/2" nails. Fill all round and obround nail holes with the 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.

Frequently Asked Questions

What size joist member is the HSULC410Z designed to support?

The HSULC410Z is sized specifically to support 4 x 10 joist members in wood-frame construction.

What angle of skew does this hanger accommodate, and can the joist end be bevel cut?

This hanger is purpose-built for a 45 deg. left-skewed connection and accommodates joist ends cut anywhere from 40 deg. to 50 deg. skew. The joist end may be either square cut or bevel cut, providing flexibility during installation.

What is the difference between the HSULC and the HSURC?

The HSULC is skewed left at 45 deg., while the HSURC is skewed right at 45 deg.. The two hangers mirror each other, offering complete installation flexibility for angled framing connections on either side.

Why is the concealed flange design beneficial, and are web stiffeners required?

The concealed header flanges keep the hanger's visible lines clean and refined, making the HSULC410Z well suited for exposed architectural conditions where appearance matters. No web stiffeners are required for standard installation, which simplifies the build process.