The Simpson MIU5.12/20 Face-Mount I-Joist Hanger is a heavy-duty 16-gauge connector sized specifically for 5-inch x 20-inch I-joists, purpose-built for commercial framing, high-load structural connections, and double I-joist assemblies where reliable face-mount support is non-negotiable. Backed by Simpson engineering and a Zinc Galvanized G90 coating for corrosion resistance, this hanger is a go-to choice for contractors tackling large-format floor and roof framing systems that demand consistent, high-capacity joist-to-header connections.

Key Features

• Face-Mount Design for 5 x 20 I-Joists - fits the exact joist profile without field modification, reducing layout time and eliminating guesswork on large commercial framing jobs.
• 16-Gauge Steel Construction - provides the structural thickness needed for high-load and double I-joist applications, giving engineers and inspectors confidence in connection integrity.
• No Web Stiffeners Required in Standard Configurations - simplifies installation and keeps labor moving faster, since crews skip the extra prep step that many competing heavy-duty hangers require.
• Positive-Angle Nailing - reduces flange splitting risk during fastening, protecting the I-joist and maintaining the structural value of the connection.
• Optional Triangle Joist Nail Holes for Enhanced Uplift Resistance - when uplift loads are a concern, this built-in option allows increased uplift capacity without switching to a different hanger model (note: properly attached web stiffeners are required when this option is used).
• Zinc Galvanized G90 Coating - delivers corrosion resistance suited to commercial and light-industrial environments where long-term fastener and connector performance matters.
• Approved for Commercial and High-Load Residential Framing - covers a wide range of structural framing scopes from heavy commercial floors to high-load residential applications, offering design flexibility across project types.

Why This Product

• Built for the Toughest Framing Scenarios - engineered specifically for high-load, commercial, and double I-joist applications, this hanger handles connection demands that exceed what standard residential hangers are rated for, making it a practical fit for complex structural framing projects.
• Faster Installation Without Sacrificing Strength - the standard configuration requires no web stiffeners, so crews can set and fasten hangers efficiently without additional prep work, keeping schedules on track on large-scale jobs.
• Flexible Uplift Options Within a Single SKU - the optional triangle joist nail holes let installers upgrade uplift resistance on the same hanger model rather than sourcing a separate product, reducing procurement complexity and on-site inventory.
• Domestic Production with Proven Corrosion Protection - produced in the United States and finished with a Zinc Galvanized G90 coating, this hanger meets the quality and durability expectations of contractors and specifiers who need consistent performance from the connector up.

Specifications

• Model Number: MIU5.12/20
• Manufacturer Part Number (MPN): MIU5.12/20
• Joist Size: 5 in. x 20 in.
• Gauge: 16
• Width: 5-1/8 in.
• Height: 19-5/16 in.
• Seat Depth: 2-1/2 in.
• Coating / Material: Zinc Galvanized, G90
• Hanger Type: Face-Mount
• Country of Origin: United States

Approved Applications

• Commercial framing requiring high-load joist connections
• Double I-joist assemblies demanding face-mount support
• High-load residential and light commercial structural framing
• Applications where positive-angle nailing is preferred to reduce flange splitting risk
• Installations requiring optional enhanced uplift resistance via triangle joist nail holes

Installation Notes

• Use all specified fasteners. Verify that the header can take the required fasteners specified in the load table.
• Models have optional triangle joist nail holes for additional uplift. Properly attached web stiffeners are required when this option is used.
• For MIU models: add four additional 10d x 11/2-inch joist nails for a total uplift load of 975 lbs.

Frequently Asked Questions

What joist size is the MIU5.12/20 designed to fit?

The MIU5.12/20 is designed specifically for a 5-inch x 20-inch I-joist, making it suited to heavy-duty framing applications that require a large-format face-mount hanger.

Do I need web stiffeners when installing the MIU5.12/20?

In standard configurations, web stiffeners are not required, which simplifies the installation process and helps crews work more efficiently on the job site.

Can the MIU5.12/20 provide additional uplift capacity if needed?

Yes. The hanger includes optional triangle joist nail holes that, when four additional 10d x 11/2-inch joist nails are added, support a total uplift load of 975 lbs., giving you added capacity for applications with higher uplift demands.

What features does the MIU5.12/20 include to speed up installation?

The MIU5.12/20 features Speed Prongs, which temporarily position and secure the hanger during installation without requiring extra hands, and Positive-Angle Nailing (PAN), which allows nailing from a more ergonomic angle while minimizing flange splitting.