Product Description
The Simpson MIT420 Top-Flange I-Joist Hanger from Simpson is built to support 90 deg. connections of I-joists to headers, delivering maximum down load capacity while requiring a minimum number of fasteners. Designed to be installed before the joist is in place, this hanger features a Funnel Flange design that simplifies member placement and speeds up the framing process. Made from 16-gauge steel with a G90 zinc galvanized finish, the MIT420 is a cost-effective, high-performance alternative to welded hangers for standard engineered wood framing applications.
Key Features
- Positive-angle nailing (PAN) minimizes splitting of the flanges while permitting time-saving nailing from a better angle - allows faster, cleaner fastening without compromising the structural integrity of I-joist flanges.
- Nail hole material is not removed with positive-angle nailing - preserves the strength of the connection point, maintaining full load performance at every fastening location.
- Optional triangle nail holes for increased uplift capacity - gives builders flexibility to upgrade the connection strength where uplift loads are a concern, with the addition of properly-secured web stiffeners.
- Funnel Flange design for easier member placement - guides the joist into position accurately, reducing time spent adjusting during installation.
- Cost-effective solution for standard 90 deg. connections in comparison to welded hangers - delivers reliable structural performance at a lower cost without the complexity of welded alternatives.
- Optional fastening with PAT for steel applications/header - expands compatibility to steel header applications, giving contractors added versatility on mixed-material framing projects.
- 16-gauge steel construction - provides the rigidity and load-bearing capacity required for heavy engineered wood members up to 3-1/2 in. x 20 in.
- Galvanized G90 zinc coating - offers extra corrosion resistance, making the hanger suitable for use in environments where moisture exposure is a concern.
Why This Product
- Engineered specifically for I-joists - the positive-angle nailing system and Funnel Flange design are purpose-built for engineered wood framing, reducing the risk of flange splitting and making installation noticeably faster compared to generic joist hangers.
- Maximum load capacity with fewer fasteners - the MIT420 is designed to achieve high down load performance while keeping fastener count low, helping contractors work more efficiently without sacrificing structural integrity.
- Built-in versatility for demanding applications - optional triangle nail holes allow for increased uplift capacity when needed, and optional PAT fastening supports steel header applications, making this hanger adaptable across a range of framing scenarios.
- Durable G90 galvanized finish on heavy-gauge steel - the combination of 16-gauge construction and zinc galvanized coating means this connector is built to last, resisting corrosion and holding up under the demands of structural framing in varied job site conditions.
Specifications
- Model Number: MIT420
- Member Size: 3-1/2 x 20
- Gauge: 16
- Width (W): 3-9/16 in.
- Height (H): 20 in.
- Seat Depth: 2-1/2 in.
- Top Flange (TF): 2-5/16 in.
- Coating/Finish: Zinc Galvanized, G90
- Country of Origin: United States
- Installation: 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 connections is the MIT420 designed for?
The MIT420 is designed to support 90 deg. connections of I-joists to headers, making it a reliable and cost-effective solution for standard framing applications involving engineered wood.
What is positive-angle nailing (PAN) and why does it matter?
Positive-angle nailing (PAN) is a feature specifically created for I-joists that minimizes splitting of the flanges while allowing nailing from a better angle to save time. Importantly, the nail hole material is not removed, which helps maintain the integrity of the connection.
How is the MIT420 installed, and when should it be placed?
The MIT420 is designed to be installed before the joist is in place. It is fastened using 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. The Funnel Flange design aids in easier placement of members during installation.
Can the MIT420 be used in applications requiring increased uplift capacity?
Yes. The optional triangle nail holes on the MIT420 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 and steel headers.
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