The Simpson MIU4.28/9 Face-Mount I-Joist Hanger 4-1/8 x 9-1/2 is a purpose-built structural connector from Simpson engineered for commercial framing, high-load applications, and double I-joist installations. Its face-mount design delivers reliable joist-to-header connections without the need for web stiffeners in standard configurations, helping professional framers and structural engineers maintain load capacity while keeping installation straightforward and efficient.

Key Features

• Designed for commercial, high-load, and double I-joist applications without requiring web stiffeners - reduces material and labor by eliminating an extra installation step in standard configurations, keeping structural framing on schedule.
• Positive-angle nailing (PAN) - minimizes splitting of the I-joist flanges during fastening and allows nailing from a more accessible angle, saving time on the job and protecting the integrity of the joist material.
• Speed prongs - temporarily position and secure the connector in place before fastening, freeing up a hand and accelerating installation on busy job sites.
• 16-gauge steel construction with zinc galvanized G90 coating - provides robust structural strength alongside corrosion resistance suited to demanding framing environments.
• Optional triangle joist nail holes for uplift enhancement - allow four additional 10dx1-1/2 in. joist nails to be added when properly attached web stiffeners are used, expanding the hanger's load capacity to meet more demanding structural requirements.

Why This Product

• No web stiffeners required for standard use - this hanger is specifically engineered so that typical commercial and double I-joist installations proceed without added blocking or stiffening components, trimming both material costs and installation time.
• Installer-friendly features built in from the start - the combination of speed prongs for hands-free positioning and positive-angle nailing for easier, safer fastening means crews spend less time fussing with the connector and more time completing the frame.
• Scalable uplift capacity when your project demands it - the optional triangle joist nail holes give engineers and contractors a straightforward path to higher uplift performance without switching to a different hanger family.
• Sized for precision fit in commercial structural framing - the 4-1/8 x 9-1/2 in. I-joist profile matches common commercial joist dimensions, making this hanger a direct, no-modification solution for face-mount structural connections in high-load wood framing projects.

Specifications

• Model No.: MIU4.28/9
• Joist Size: 4-1/8 in. x 9-1/2 in.
• Gauge (Ga.): 16
• Width: 4-1/4 in.
• Height: 9 in.
• Seat Depth: 2-1/2 in.
• Coating/Material: Zinc Galvanized, G90
• Country of Origin: United States

Approved Applications

• Commercial framing projects requiring high-load I-joist connections
• Double I-joist hanger applications
• Structural applications where face-mount installation is required
• Installations requiring optional uplift enhancement via triangle joist nail holes with properly attached web stiffeners

Frequently Asked Questions

Does the MIU4.28/9 require web stiffeners for standard installation?

No. The MIU hanger is specifically designed for commercial, high-load and double I-joist applications without requiring web stiffeners in standard configurations. However, properly attached web stiffeners are required when using the optional triangle joist nail holes for additional uplift.

What is positive-angle nailing (PAN) and why does it matter?

Positive-angle nailing (PAN) is a design feature of the MIU hanger that minimizes splitting of the I-joist flanges during installation. It also allows nailing from a better angle, saving time on the job and reducing the risk of damage to the joist material.

How can I achieve the maximum uplift load with this hanger?

To reach a total uplift load of 975 lbs., add four additional 10dx1-1/2" joist nails using the optional triangle joist nail holes. Properly attached web stiffeners are required when using this configuration.

What fastener guidance should be followed during installation?

Always use all specified fasteners and verify that the header can accommodate the required fasteners specified in the load table. Following the complete fastener schedule is essential to achieving the rated load values for this connector.

Note: Product dimensions may differ from picture. Please see the item description above for specifications.