The Simpson MIU4.75/9 Face-Mount I-Joist Hanger by Simpson is a 16-gauge steel face-mount hanger engineered for commercial and high-load I-joist applications, providing a strong, reliable connection for 4-5/8 in. x 9-1/4 in. to 9-1/2 in. engineered wood members. Designed specifically for I-joist construction, this hanger eliminates the need for web stiffeners while delivering the load capacity demanding structural projects require. Its positive-angle nailing design makes it a practical choice for builders and contractors who need both performance and installation efficiency on the job site.

Key Features

• Positive-angle nailing minimizes splitting of the flanges while permitting time-saving nailing from a better angle - lets installers work faster and reduces the risk of damaging engineered wood flanges during fastening.
• No web stiffeners required - simplifies installation on commercial and high-load I-joist applications, cutting down on labor and material costs.
• Fits actual joist size of 4-5/8 in. x 9-1/4 in. to 9-1/2 in. - sized precisely for standard engineered wood I-joists in this range, ensuring a proper, secure fit without field adjustments.
• Made from 16-gauge steel - provides the structural rigidity and load-bearing strength needed for commercial-grade framing connections.
• Galvanized with a G90 zinc coating - delivers extra corrosion resistance to help maintain connection integrity in moisture-prone environments over the long term.
• These hangers cannot be modified - confirms that the hanger is used as manufactured, preserving the structural integrity and load ratings of the connection as designed.

Why This Product

• Built for high-load I-joist construction without added hardware - the MIU series is engineered specifically for commercial and high-load I-joist applications, and the no-web-stiffener design means fewer components to source and manage on site.
• Positive-angle nailing saves time and protects the joist - the PAN design allows fastening from a more accessible angle, reducing flange splitting and helping crews maintain a faster, cleaner installation pace.
• G90 galvanized coating for lasting corrosion resistance - the zinc galvanized finish adds a meaningful layer of protection in framing environments where moisture exposure is a concern, supporting the long-term performance of the structural connection.
• American-made precision fit for engineered wood - designed to the exact dimensions of 4-5/8 in. wide I-joists, this hanger works with standard engineered lumber without field modification, reducing the potential for installation errors.

Specifications

• MPN: MIU4.75/9
• Member Size: 4-5/8 in. x 9-1/4 in to 9-1/2 in.
• Width: 4-3/4 in.
• Height: 9-1/16 in.
• Seat Depth: 2-1/2 in.
• Gauge: 16
• Coating/Finish: Zinc Galvanized, G90
• Install With: 0.162 in. x 3-1/2 in. nails and 0.148 in. x 1-1/2 in. nails (sold separately)
• Country of Origin: United States

Frequently Asked Questions

What joist size is the Simpson MIU4.75/9 designed to support?

The MIU4.75/9 is designed for an actual joist size of 4-5/8 in. x 9-1/4 in. to 9-1/2 in., making it suitable for standard engineered wood I-joists in that size range.

What type of fasteners are required to install this hanger?

Installation requires 0.162 in. x 3-1/2 in. nails and 0.148 in. x 1-1/2 in. nails. Use all specified fasteners and verify that the header can accept the required fasteners.

Does the MIU4.75/9 require web stiffeners?

No. The MIU series hangers are specifically designed for commercial and high-load I-joist applications without requiring web stiffeners, simplifying the installation process.

Can the MIU4.75/9 hanger be modified in the field?

No. These hangers cannot be modified. Any alteration to the hanger is not permitted and could compromise the structural integrity of the connection.

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