The Simpson HU312 Heavy-Duty Face-Mount Joist Hanger is a structural connector from Simpson Strong-Tie built for framing applications that demand additional strength and safety factors. Designed to support a nominal 3x12 joist member, this face-mount hanger is the go-to choice of engineers and contractors who need a reliable, heavy-duty connection at the header. Whether you are tackling a large residential build or a demanding commercial framing project, this hanger is engineered and tested to meet the highest quality standards.

Key Features

• "U" design allows for flexibility of placement on the header - gives installers more freedom to position the hanger accurately without being locked into a single mounting point, saving time and reducing frustration on the job.
• Nominal joist size: 3x12 - purpose-built for larger lumber members, making it the right fit for heavy-duty structural framing where undersized hardware is not an option.
• Made from 14-gauge steel - the heavier steel construction delivers the load capacity and durability that demanding structural connections require.
• Galvanized (G90) for extra corrosion resistance - the zinc galvanized finish helps protect the hanger from moisture and environmental exposure, supporting long-term performance in tough conditions.

Why This Product

• Engineered for heavy-duty performance - this hanger is specifically designed for structures requiring additional strength and safety factors, giving builders confidence that the connection will hold up where lighter-duty alternatives may fall short.
• Flexible installation made practical - the "U" design lets you fine-tune header placement in the field, reducing the need for rework and helping framing crews move efficiently through the project.
• Built to last in demanding environments - the G90 zinc galvanized coating provides an extra layer of corrosion resistance, making this hanger a sound long-term investment for both interior and moisture-exposed framing applications.
• Trusted by professionals, made in the United States - Simpson Strong-Tie connectors are the choice of engineers and contractors, and this hanger is manufactured to the quality standards that demanding structural work requires.

Specifications

• MPN: HU312
• Member Size: 3x12
• Height: 10-7/8 in.
• Width: 2-9/16 in.
• Seat Depth: 2-1/2 in.
• Gauge: 14
• Coating/Finish: Zinc Galvanized, G90
• Install With: 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

Frequently Asked Questions

What size joist is the HU312 designed to support?

The HU312 is designed for a nominal joist size of 3x12, making it suitable for heavy-duty framing applications that require a larger member size.

What type of nails should be used to install the HU312?

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 for proper installation.

What gauge steel is the HU312 made from, and how is it protected against corrosion?

The HU312 is made from 14-gauge steel and features a Zinc Galvanized (G90) coating, which provides extra corrosion resistance for long-lasting performance in demanding environments.

What advantage does the "U" design of the HU312 provide?

The "U" design allows for flexibility of placement on the header, giving installers more versatility during framing and helping to simplify the installation process.

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