The Simpson WP3.56/5.5 Welded Top-Flange Joist Hanger is an engineered structural connector from Simpson built to support joists on purlins or beams across a broad range of residential and commercial framing assemblies. Its welded top-flange construction delivers consistent, reliable performance in wood-to-wood, wood-to-steel, and cold-formed steel applications, giving contractors and builders a single versatile hanger solution that handles the connection types most commonly encountered on the job site.

Key Features

• Welded top-flange design - provides secure, positive joist bearing on purlins or beams, reducing movement at the connection point and simplifying installation in floor and roof framing assemblies.
• Multi-material compatibility - supports wood-to-wood, wood-to-steel, and cold-formed steel connections, eliminating the need to stock multiple hanger types for mixed-material structural framing projects.
• Skewed framing capability up to 84 deg. - accommodates severely angled layouts without requiring custom fabrication, keeping complex framing jobs on schedule.
• Sloped installation support up to 45 deg. - allows use in pitched roof framing and other sloped structural applications where standard hangers would be inadequate.
• 12 ga. stirrup material - heavy-gauge steel construction provides the load-carrying strength required for demanding structural framing applications in both residential and commercial settings.
• Simpson Strong-Tie Gray Paint finish - offers corrosion resistance suitable for typical interior framing environments, with hot-dip galvanized options available for projects requiring enhanced protection.
• Domestic manufacturing - produced in the United States, supporting consistent quality standards and reliable availability for contractors planning structural work.

Why This Product

• Exceptional angular range in a single connector - the ability to skew up to 84 deg. and slope up to 45 deg. means this top-flange hanger covers framing scenarios that would otherwise require specialty or custom hardware, simplifying procurement and reducing job-site inventory.
• True multi-material versatility - compatibility with wood-to-wood, wood-to-steel, and cold-formed steel framing means the same Simpson hanger works across different structural systems on the same project, cutting down on the number of connector SKUs a builder needs to manage.
• Welded construction for predictable performance - the welded assembly ensures dimensional consistency from piece to piece, which translates to repeatable installation results and confidence that each connection meets structural requirements.
• Backed by Simpson engineering - as a product from Simpson, a recognized name in structural connectors, this joist hanger is designed to meet the demands of approved applications in structural framing, giving specifiers and inspectors a familiar, trusted solution.

Specifications

• Model Number: WP3.56/5.5
• Brand: Simpson Strong-Tie
• Joist Size: 3-1/2 in. x 5-1/2 in.
• Description: Welded Top-Flange Joist Hanger
• Material - Stirrup: 97 mil (12 ga.)
• Finish: Simpson Strong-Tie Gray Paint; select models available hot-dip galvanized as a custom order
• Country of Origin: United States

Approved Applications

• Supporting joists on purlins or beams in structural framing assemblies
• Wood-to-wood connections in floor and roof framing
• Wood-to-steel connections in mixed-material construction
• Cold-formed steel framing applications
• Skewed framing layouts up to 84 deg.
• Sloped installations up to 45 deg.

Options

• Contact us for Configurable Options and Special orders
• Refer to the Special-Order Worksheet for ease of ordering a Custom WP Hanger

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