The Simpson HB3.56/18 Top Flange I-Joist Hanger by Simpson is a top-flange hanger engineered to carry medium to high loads for solid sawn and engineered wood applications. Sized for a 3-1/2 in. x 18 in. member, this heavy beam hanger features a full-height joist flange that captures the top chord of the joist to prevent rotation - a critical detail for structural stability in demanding framing connections. Its one-piece construction delivers a cost-effective solution compared to welded hangers, making it a practical choice for contractors working with I-joists and other engineered lumber in floor and roof systems.

Key Features

• One-piece, high-load design - eliminates the need for costlier welded hangers while still handling medium to high structural loads, keeping material costs in check without sacrificing performance
• Full-height joist flange - captures the top chord of the joist to actively prevent rotation, improving connection integrity for engineered wood and solid sawn members alike
• 10-gauge steel construction - provides the structural thickness and rigidity required for heavy beam applications in demanding framing environments
• Zinc Galvanized G90 coating - delivers extra corrosion resistance, helping the hanger hold up in jobsite conditions where moisture exposure is a concern
• Available for special order in sloped and/or skewed configurations - gives builders the flexibility to address non-standard framing angles without sourcing a completely different product family
• Requires web stiffeners - an important installation requirement to be aware of, ensuring proper load transfer and long-term structural performance when used with I-joists

Why This Product

• Cost-effective alternative to welded hangers - the efficient one-piece design supports high-load applications at a lower cost than fabricated or welded options, making it a smart choice for budget-conscious structural framing projects
• Built specifically for engineered wood - the full-height joist flange and top-flange design are purpose-matched to the geometry of I-joists and other engineered lumber, reducing the risk of rotation and connection failure
• Heavy-gauge corrosion protection - combining 10-gauge steel with a G90 galvanized finish means this hanger is built to perform structurally and resist environmental wear over the life of the structure
• Flexible for complex framing layouts - the option to accommodate sloped and/or skewed members means this hanger series can adapt to a wider range of structural configurations beyond standard square connections

Specifications

• MPN: HB3.56/18
• Member Size: 3-1/2 in. x 18 in.
• Gauge: 10
• Coating: Zinc Galvanized, G90
• Finish: Zinc Galvanized, G90
• Install With: (22) 0.162 in. x 3-1/2 in. nails in the header and (10) 0.162 in. x 3-1/2 in. nails in the joist
• Country of Origin: United States

Options

• Contact us for Special orders

Frequently Asked Questions

What size member does the HB3.56/18 support?

The HB3.56/18 is designed for an actual joist size of 3-1/2 in. x 18 in., suitable for both solid sawn and engineered wood applications.

What type of nails are required to install this hanger?

Installation requires (22) 0.162 in. x 3-1/2 in. nails in the header and (10) 0.162 in. x 3-1/2 in. nails in the joist.

Are web stiffeners required when using the HB3.56/18?

Yes, the use of web stiffeners is required with this hanger. This is an important installation consideration for structural integrity.

What corrosion protection does the HB3.56/18 offer?

The HB3.56/18 is finished with a Zinc Galvanized G90 coating, which provides extra corrosion resistance for demanding jobsite environments.

Note: Product dimensions may differ from picture. Please see item description for specifications.