Product Description
The Simpson MIT39.5-2 Top-Flange Joist Hanger for Double 2-1/2 in. x 9-1/2 in. Engineered Wood is a structural connector from Simpson designed to support standard 90 deg. connections of I-joists to headers in engineered wood framing. Built as a top-flange hanger, it delivers maximum down loads while requiring a minimum number of fasteners - making it a cost-effective, time-saving alternative to welded hangers. The Funnel Flange design allows for easier placement of members before the joist is set, and the connector is fabricated from 16-gauge steel with a G90 zinc galvanized finish for lasting corrosion resistance.
Key Features
- Positive-angle nailing (PAN) specifically created for I-joists - allows nails to be driven from a better angle, minimizing flange splitting and reducing installation time on the job site
- Nail hole material is not removed with PAN - preserves the structural integrity of the hanger so you get full performance without compromising the connector
- Optional triangle nail holes for increased uplift capacity - gives you added flexibility for demanding load conditions; note that optional uplift nailing requires the addition of properly-secured web stiffeners
- Funnel Flange design - simplifies member placement before the joist is installed, helping crews work faster with fewer alignment frustrations
- Optional fastening with PAT for steel header applications - expands compatibility so the hanger works across a broader range of framing scenarios without requiring a separate connector
- 16-gauge steel construction with G90 zinc galvanized finish - provides the corrosion resistance needed for demanding framing environments while keeping the connector structurally sound over time
- Cost-effective alternative to welded hangers - achieves reliable 90 deg. I-joist-to-header connections with fewer fasteners, reducing both material and labor costs
Why This Product
- Engineered specifically for I-joist framing - the PAN system and Funnel Flange design address the real challenges of working with engineered wood, from flange splitting to tricky member placement, in ways that a generic joist hanger simply does not
- Versatile enough for standard and demanding load conditions - optional triangle nail holes allow this single connector to scale up for increased uplift requirements, reducing the need to source a different hanger for higher-load applications
- Compatible with both wood and steel header applications - optional PAT fastening means this top-flange hanger can be used across mixed-material framing systems, giving builders and contractors greater flexibility on complex projects
- Durable G90 galvanized finish for long-term performance - the zinc galvanized coating provides extra corrosion resistance, making this connector a dependable choice for framing applications where moisture exposure is a concern
Specifications
- MPN: MIT39.5-2
- Member Size: Double 2-1/2 x 9-1/2
- Gauge: 16
- Width: 5-1/8 in.
- Height: 9-1/2 in.
- Seat Depth: 2-1/2 in.
- Top Flange: 2-5/16 in.
- Coating/Finish: Zinc Galvanized, G90
- 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)
- Country of Origin: United States
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 connection is the MIT39.5-2 designed for?
The Simpson Strong-Tie MIT39.5-2 is designed to support standard 90 deg. connections of I-joists to headers, making it ideal for engineered wood framing applications where precise, reliable load transfer is required.
What does positive-angle nailing (PAN) mean, and why is it beneficial?
Positive-angle nailing (PAN) is a feature specifically created for I-joists that allows nails to be driven from a better angle, saving installation time and minimizing splitting of the flanges. Importantly, with positive-angle nailing, the nail hole material is not removed, preserving the structural integrity of the hanger.
What fasteners are required to install the MIT39.5-2?
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. Optional fastening with PAT is also available for steel header applications.
Can the MIT39.5-2 be used where increased uplift capacity is needed?
Yes. The optional triangle nail holes on the MIT39.5-2 may be used for increased uplift capacity. However, optional uplift nailing requires the addition of properly-secured web stiffeners to meet performance requirements.
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