The Simpson U66 Face-Mount Joist Hanger is a heavy-duty connector engineered by Simpson for reliable, flexible joist-to-header connections in wood-framed construction. Formed from 16-gauge steel with a G90 zinc galvanized finish, this face-mount hanger is sized for nominal 6x6 lumber and is compatible with 6x8 members, making it a versatile solution for heavier structural framing applications. Trusted by engineers and contractors alike, it is manufactured to meet the demands of projects where structural integrity and efficient installation are equally critical.

Key Features

• Speed prongs locate the hanger on the header - allow for quick, accurate positioning before nailing, reducing installation time and improving placement precision on the job site.
• Flexible face-mounted joist-to-header installation - accommodates a range of framing conditions, giving installers greater versatility when connecting joists to headers in wood-frame structures.
• Sized for nominal 6x6 lumber, compatible with 6x8 members - supports heavier dimensional lumber connections, making this hanger suitable for demanding structural framing applications.
• Formed from 16-gauge steel - provides the strength and rigidity required for load-bearing joist connections in residential and commercial wood-framed construction.
• G90 zinc galvanized coating - delivers extra corrosion resistance, helping the hanger hold up in environments where moisture exposure is a concern.

Why This Product

• Built for heavier lumber connections - with support for nominal 6x6 and 6x8 member sizes, this hanger handles the larger dimensional lumber common in decks, pergolas, and structural framing where lighter hangers are not adequate.
• Faster, more accurate installation - the integrated speed prongs let you set the hanger in the correct position on the header before driving a single nail, reducing guesswork and helping maintain consistent alignment across a full framing project.
• Corrosion-resistant finish for lasting performance - the G90 zinc galvanized coating provides extra protection against rust and corrosion, making this hanger a dependable choice where long-term durability matters.
• Engineered and tested to perform - Simpson connectors are manufactured to high quality standards and are the preferred choice of engineers and contractors for projects that must meet building code requirements.

Specifications

• Model Number: U66
• Gauge: 16
• Width (W): 5-1/2 in.
• Height (H): 5 in.
• Bearing (B): 2 in.
• Coating / Finish: Zinc Galvanized, G90
• Member Size: 6x6, 6x8
• Installation Fasteners: Install with 10d or 16d common nails in the header and 10d common nails in the joist (sold separately)

Options

• Contact us for Configurable Options and Special orders
• Refer to technical bulletin for ease of ordering a Custom U hanger

Load Tables / Values / Installation

• Face-Mount Hangers - Solid Sawn Lumber (DF / SP) Tables
• Face-Mount Hangers - Solid Sawn Lumber (SPF / HF) Tables
• Face-Mount Hangers - Rough Lumber (DF / SP / SPF / HF) Tables
• Face-Mount Hangers - I-Joists, Glulam and SCL Tables

Frequently Asked Questions

What size lumber is the Simpson U66 designed to support?

The U66 is designed for a nominal 6x6 joist size and is also compatible with 6x8 member sizes, making it a versatile choice for heavier lumber connections in wood-framed construction.

What fasteners should be used to install the U66 joist hanger?

The U66 should be installed with 10d or 16d common nails driven into the header, and 10d common nails driven into the joist for a secure, code-compliant connection.

What is the purpose of the speed prongs on the U66?

The speed prongs are a built-in feature that allow the installer to quickly and accurately locate and position the hanger on the header before nailing, saving time and improving installation precision.

Why is the G90 galvanized coating important?

The G90 zinc galvanized coating provides an extra layer of corrosion resistance compared to standard coatings, helping the hanger maintain its structural integrity over time in environments where moisture exposure is a concern.

Downloads and Resources

• Face-Mount Hangers - Solid Sawn Lumber (DF / SP) Tables
• Face-Mount Hangers - Solid Sawn Lumber (SPF / HF) Tables
• Face-Mount Hangers - Rough Lumber (DF / SP / SPF / HF) Tables
• Face-Mount Hangers - I-Joists, Glulam and SCL Tables

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