The Simpson WP312 Welded Top-Flange Joist Hanger is a structural connector built to handle demanding framing conditions where standard hangers fall short. Engineered by Simpson for supporting joists on purlins or beams, the WP312 accommodates skewed framing layouts up to 84 deg. and sloped conditions up to 45 deg., giving contractors and builders a dependable solution for complex wood-to-wood, wood-to-steel, and cold-formed steel framing applications. Its welded top-flange design provides a secure, low-profile seat that simplifies installation while maintaining structural integrity across a wide range of job-site conditions.

Key Features

• Skew capacity up to 84 deg. - accommodates sharply angled framing layouts that would be impossible or unsafe with conventional hangers, reducing the need for field fabrication.
• Slope capacity up to 45 deg. - supports pitched roof and floor applications without requiring custom-cut blocking or additional hardware, keeping the job moving.
• Welded top-flange construction - delivers a rigid, pre-formed seat that transfers loads efficiently and holds consistent geometry during fastening, reducing installation errors.
• 12-gauge stirrup material at 97 mil thickness - provides a robust structural connection capable of handling demanding download forces in both light-frame and heavy-frame assemblies.
• Simpson Strong-Tie Gray Paint finish - offers corrosion resistance suitable for interior and protected exterior applications, with hot-dip galvanized available as a custom option for more demanding environments.
• Compatible with wood-to-wood, wood-to-steel, and cold-formed steel assemblies - a single hanger type covers multiple framing systems, reducing the number of SKUs a contractor needs to carry on site.

Why This Product

• Unmatched angular flexibility for complex framing - with skew capability up to 84 deg. and slope capability up to 45 deg., this hanger handles the kind of non-standard framing geometry that forces other products off the table, giving structural framers a reliable path forward on difficult projects.
• Broad application compatibility - approved for wood-to-wood, wood-to-steel, and cold-formed steel connections, the WP312 adapts to the structural system on site rather than requiring the framer to adapt to the connector.
• Trusted Simpson engineering and domestic production - backed by the quality standards and load-tested design that the Simpson brand is known for, this connector is made in the United States to consistent manufacturing tolerances.
• Configurable for project-specific needs - the WP series supports custom configurations through a dedicated Special-Order Worksheet, allowing engineers and contractors to dial in the exact geometry required rather than settling for an off-the-shelf approximation.

Specifications

• Model Number: WP312
• Brand: Simpson Strong-Tie
• Joist Size: 3 in. x 12 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
• Wood-to-wood structural connections
• Wood-to-steel structural connections
• Cold-formed steel framing applications
• Skewed framing layouts up to 84 deg.
• Sloped framing conditions 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.