The Simpson ITS3.56/16 ITS Galvanized Top-Flange Joist Hanger from Simpson is an innovative engineered wood connector designed to set a new standard for top-flange hanger performance. Built specifically to support 3-1/2 in. x 16 in. I-joists, this hanger installs faster and uses fewer nails than other EWP top-flange hangers, making it an efficient choice for residential and light commercial framing projects. The Strong-Grip seat and Funnel Flange design work together to secure I-joists without requiring joist nails during standard installation, delivering a lower installed cost for builders and contractors.

Key Features

• Strong-Grip seat accommodates flange thicknesses from 1 1/8 in. to 1 1/2 in. - provides a firm, secure hold on a range of I-joist flange sizes without additional adjustment, reducing installation guesswork.
• No joist nailing required for standard I-joist installation without web stiffeners - cuts labor time and fastener count on the job site, lowering overall installation cost.
• Top-flange design for 3-1/2 in. x 16 in. engineered wood I-joists - ensures a precise, purpose-built fit that eliminates the need for field modification or shimming.
• Constructed from 18-gauge steel - delivers reliable structural strength while keeping the hanger lightweight and easy to handle during installation.
• Zinc Galvanized G90 coating - provides a durable layer of corrosion resistance suited for treated lumber environments and moisture-prone framing applications.
• Installed with 0.148 in. x 3 in. nails - uses a common fastener size that integrates easily into standard framing workflows without specialty hardware.

Why This Product

• Faster installation, fewer fasteners - the Funnel Flange and Strong-Grip seat work together so standard I-joist installation requires no joist nails, meaning crews spend less time per connection and move through framing stages more quickly.
• Purpose-built for engineered wood - designed specifically for EWP top-flange applications, this hanger supports the actual dimensions and flange characteristics of today's engineered I-joists rather than relying on a generic fit.
• Corrosion-resistant finish for lasting performance - the G90 zinc galvanized coating guards against rust and degradation, making this hanger a dependable long-term connection even in demanding jobsite conditions.
• American-made construction from Simpson - backed by the engineering standards and quality control that have made Simpson a trusted name in structural connectors across the construction industry.

Specifications

• MPN: ITS3.56/16
• Brand: Simpson Strong-Tie
• Member Size: 3-1/2 in. x 16 in.
• Width (W): 3-5/8 in.
• Height (H): 15-15/16 in.
• Bearing (B): 2 in.
• Gauge: 18
• Coating/Finish: Zinc Galvanized, G90
• Install With: 0.148 in. x 3 in. nails (sold separately)
• Top Flange: 1-7/16 in.
• Country of Origin: United States

Options

• Contact us for Configurable Options and Special orders

Frequently Asked Questions

What joist size is the ITS3.56/16 designed to support?

The ITS3.56/16 is designed for an actual joist size of 3-1/2 in. x 16 in., making it ideal for standard engineered wood I-joists of that dimension.

Does the ITS3.56/16 require nails through the joist during installation?

No. The Strong-Grip seat and Funnel Flange design allow standard I-joist installation without requiring joist nails, as long as web stiffeners are not needed, significantly speeding up the installation process.

What flange thicknesses are compatible with the Strong-Grip seat?

The Strong-Grip seat firmly secures I-joists with flange thicknesses ranging from 1 1/8 in. to 1 1/2 in.

What type of nails should be used to install the ITS3.56/16?

The ITS3.56/16 should be installed with 0.148 in. x 3 in. nails for proper fastening and structural performance.

Note: Product dimensions and/or fastener holes may differ from picture. Please see item description for specifications.