Product Description
The Simpson MIT418 Top-Flange Joist Hanger for 3-1/2 in. x 18 in. Engineered Wood is a heavy-duty metal connector from Simpson engineered to support 90 deg. connections of I-joists to headers in engineered wood framing systems. Designed to be installed before the joist is placed, this top-flange hanger delivers maximum down loads while requiring a minimum number of fasteners. Its Funnel Flange design simplifies member placement, and its positive-angle nailing system is purpose-built for I-joists - making it a reliable, efficient choice for residential and commercial framing projects that demand structural precision.
Key Features
- Positive-angle nailing (PAN) minimizes splitting of the flanges while permitting time-saving nailing from a better angle - reduces the risk of damaging engineered wood I-joist flanges during installation while speeding up the nailing process.
- Nail hole material is not removed with positive-angle nailing - preserves the structural integrity of the connection point, maintaining full load-transfer capacity at every fastener location.
- Optional triangle nail holes for increased uplift capacity - gives builders flexibility to upgrade the connection's resistance to uplift forces where project conditions demand it (requires properly-secured web stiffeners).
- Optional fastening with PAT for steel applications/header - expands compatibility to steel header applications, making this hanger a versatile connector across mixed-material framing scenarios.
- Funnel Flange design for easier member placement - guides the I-joist into position quickly, reducing frustration and labor time during installation.
- Made from 16-gauge steel with a G90 zinc galvanized finish - provides a robust, corrosion-resistant connector suited for demanding framing environments where long-term durability matters.
- Cost-effective solution for standard 90 deg. I-joist connections - delivers the structural performance of welded hangers at a lower cost, without sacrificing load capacity or installation quality.
Why This Product
- Built specifically for engineered wood I-joists - the combination of Funnel Flange geometry and positive-angle nailing (PAN) addresses the unique splitting vulnerability of I-joist flanges, making this hanger a purpose-engineered solution rather than a generic connector adapted for the application.
- Maximizes structural performance with fewer fasteners - the MIT418 is designed to achieve maximum down loads while minimizing the number of fasteners required, reducing both material use and installation time on the job site.
- Flexible enough to handle demanding load conditions - optional triangle nail holes allow increased uplift capacity when needed, and optional PAT fastening extends compatibility to steel header applications, giving contractors a single connector that adapts to a wider range of structural scenarios.
- G90 galvanized steel construction supports long-term reliability - 16-gauge steel with a zinc galvanized G90 finish delivers the corrosion resistance and structural rigidity required for connections that need to perform consistently over the life of the structure.
Specifications
- Model Number: MIT418
- Member Size: 3-1/2 x 18
- Width: 3-9/16 in.
- Height: 18 in.
- Seat Depth: 2-1/2 in.
- Top Flange: 2-5/16 in.
- Gauge: 16
- Coating/Finish: Zinc Galvanized, G90
- Country of Origin: United States
- Installation Fasteners: Install with 0.162 in. x 3-1/2 in. nails in the header and 0.148 in. x 1-1/2 in. nails in the joist (sold separately)
Options
- Contact us for Configurable Options and Special orders
Note: Product dimensions may differ from picture. Please see the item description above for specifications.
Frequently Asked Questions
What type of joist is the MIT418 designed to support?
The MIT418 is specifically designed to support 90 deg. connections of I-joists to headers. Its Funnel Flange design and positive-angle nailing (PAN) feature are both optimized for use with engineered wood I-joists.
What does positive-angle nailing (PAN) do, and why does it matter for I-joists?
Positive-angle nailing (PAN) is specifically created for I-joists to minimize splitting of the flanges. It also permits time-saving nailing from a better angle, and importantly, the nail hole material is not removed, which helps preserve the integrity of the connection.
What fasteners are required to install the MIT418?
Install with 0.162 in. x 3-1/2 in. nails in the header and 0.148 in. x 1-1/2 in. nails in the joist.
Can the MIT418 be used for increased uplift capacity?
Yes. Optional triangle nail holes may be used for increased uplift capacity; however, optional uplift nailing requires the addition of properly-secured web stiffeners. The hanger also features optional fastening with PAT for steel applications/header.
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