The Simpson MIU4.75/18 Galvanized Face-Mount I-Joist Hanger is built for commercial framing and high-load engineered wood applications where a dependable, properly sized connection is critical. Sized to fit a 4-5/8 in. x 18 in. I-joist, this face-mount hanger secures directly to the header without requiring web stiffeners, streamlining installation on demanding structural projects. Fabricated from 16-gauge steel with a G90 zinc galvanized finish, it delivers the corrosion resistance and load-handling capability that commercial and high-load residential framing demands. Simpson positive-angle nailing (PAN) technology is built in, making this hanger a practical, time-saving choice for professional framers working with engineered lumber.

Key Features

• Positive-Angle Nailing (PAN) - Allows nailing from a more ergonomic angle, minimizing splitting of the I-joist flanges and speeding up installation on the job site.
• No Web Stiffeners Required - Engineered specifically for high-load I-joist applications without web stiffeners, reducing material needs and simplifying the connection detail.
• 16-Gauge Steel Construction - Heavy-gauge steel provides the structural integrity needed for commercial framing and other demanding load conditions.
• G90 Zinc Galvanized Finish - Offers enhanced corrosion resistance, making this hanger suitable for environments where moisture exposure is a concern.
• Cannot Be Modified - The fixed design ensures the hanger performs exactly as engineered and tested, maintaining connection integrity as intended.
• Installs with Specified Fasteners - Designed for use with 0.162 in. x 3-1/2 in. nails and 0.148 in. x 1 1/2 in. nails, giving installers a clear, code-consistent fastening schedule.

Why This Product

• Purpose-Built for High-Load I-Joist Connections - The MIU series is specifically engineered for commercial and high-load I-joist applications, so buyers get a hanger sized and rated for the job rather than a general-purpose alternative.
• Faster, Split-Free Nailing in the Field - Positive-angle nailing reduces flange splitting and lets crews nail from a better angle, cutting installation time without sacrificing connection quality.
• Corrosion Resistance Built In - The G90 zinc galvanized coating provides a meaningful layer of protection against corrosion, extending service life in conditions where bare steel would be vulnerable.
• Made in the United States by Simpson - Produced domestically by Simpson Strong-Tie, a widely trusted name in structural connectors, giving buyers confidence in consistent quality and manufacturing standards.

Specifications

• Manufacturer Part Number (MPN): MIU4.75/18
• Member / Joist Size: 4-5/8 in. x 18 in.
• Width: 4-3/4 in.
• Height: 17-1/2 in.
• Seat Depth: 2-1/2 in.
• Steel Gauge: 16-gauge
• Coating / Finish: Zinc Galvanized, G90
• Mount Type: Face-Mount
• 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

Approved Applications

• Commercial framing and high-load I-joist applications
• Engineered wood I-joist connections at 4-5/8 in. x 18 in. member size
• Face-mount hanger installations where web stiffeners are not practical or desired
• Applications requiring positive-angle nailing for faster, split-free installation

Installation

Install the Simpson MIU4.75/18 using all specified fasteners: 0.162 in. x 3-1/2 in. nails and 0.148 in. x 1-1/2 in. nails. Use all specified fasteners as required. Note that these hangers cannot be modified in the field.

Note: Product dimensions may differ from picture. Please refer to the specifications listed above for accurate dimensions.

Frequently Asked Questions

What size I-joist is the MIU4.75/18 designed to support?

The MIU4.75/18 is designed to support an engineered wood I-joist with an actual size of 4-5/8 in. x 18 in. It is a face-mount hanger, meaning it mounts directly to the face of the header to secure the joist.

Does this hanger require web stiffeners during installation?

No. The MIU series is specifically designed for commercial and high-load I-joist applications without requiring web stiffeners, which can simplify the installation process on demanding projects.

What nails should be used to install the MIU4.75/18?

The MIU4.75/18 should be installed with 0.162 in. x 3-1/2 in. nails and 0.148 in. x 1-1/2 in. nails. Using the correct nail sizes is important for achieving the hanger's rated load performance.

Can the MIU4.75/18 be field-modified or skewed to fit a different application?

No. These hangers cannot be modified. They are engineered to exact specifications and must be used as provided. If a different joist size or angle is needed, a different hanger model should be selected.