The Simpson HL55 Heavy L-Shaped Angle is a heavy-duty structural connector engineered by Simpson Strong-Tie to reinforce right-angle connections in timber framing and wood construction. Formed from 7-gauge steel with a G90 zinc galvanized finish, this heavy angle is built to resist uplift and diagonal forces where two framing members meet at a 90 deg. angle. Versatile by design, it promotes standardization and construction economy while remaining fully compatible with Simpson Strong-Tie structural hardware, making it a trusted solution for both professional contractors and engineers who demand consistent, code-compliant performance.

Key Features

• Right-angle timber connection support - reinforces structural joints where two wood framing members meet at a 90 deg. angle, keeping connections tight and aligned under load
• Uplift and diagonal force resistance - engineered to counter the lateral and vertical forces that can compromise wood connections over time, adding measurable structural integrity to framing assemblies
• 7-gauge steel construction - the heavy-gauge steel body provides substantial load-bearing capacity suited for demanding timber framing and structural applications
• G90 zinc galvanized coating - the G90 galvanized finish delivers extra corrosion resistance, helping the connector hold up in moisture-exposed or outdoor framing environments
• Compatible with Simpson Strong-Tie structural hardware - designed to work within the broader Simpson Strong-Tie connector system, supporting standardization across a project and simplifying hardware selection
• Installs with 1/2 in. diameter bolts - a straightforward bolted installation method means secure, repeatable fastening without specialty tools or hardware

Why This Product

• Engineered and tested for structural confidence - Simpson Strong-Tie connectors are engineered and tested to perform, giving builders the assurance that this heavy angle will deliver consistent results when installed to guidelines, whether on a home project or a code-compliant structure
• Heavy-gauge build for demanding timber work - at 7-gauge steel, this connector is purpose-built for heavy framing connections that lightweight angles cannot adequately support, making it the right choice when structural integrity is non-negotiable
• Corrosion-resistant for long-term durability - the G90 galvanized finish goes beyond basic protection, helping the connector resist corrosion in applications where exposure to moisture is a real concern, extending the service life of the connection
• Promotes construction economy through standardization - because this heavy angle is compatible with Simpson Strong-Tie structural hardware, it supports a standardized approach to framing connections that reduces complexity and keeps projects moving efficiently

Specifications

• Manufacturer Part Number (MPN): HL55
• Brand: Simpson Strong-Tie
• Width 1: 5-3/4 in.
• Width 2: 5-3/4 in.
• Length: 5 in.
• Overall Size: 5-3/4 in. x 5-3/4 in. x 5 in.
• Gauge: 7-Gauge Steel
• Coating / Finish: Zinc Galvanized, G90
• Country of Origin: United States

Approved Applications

• Connecting timber framing members where two members meet at a 90 deg. angle
• Reinforcing right-angle connections in wood construction
• Resisting uplift and diagonal forces in structural wood connections
• Projects requiring standardization and construction economy with compatible Simpson Strong-Tie structural hardware
• Home projects and structures requiring compliance with building codes

Installation

Install the Simpson HL55 Heavy Angle with 1/2 in. diameter bolts. This connector is engineered and tested to deliver consistent performance when installed according to Simpson Strong-Tie guidelines. For best results, use genuine Simpson Strong-Tie compatible structural hardware.

Frequently Asked Questions

What size is the Simpson HL55 Heavy Angle?

The HL55 measures 5-3/4 in. x 5-3/4 in. x 5 in., making it a substantial heavy-duty connector suited for timber framing and structural right-angle connections.

What hardware is used to install the HL55?

The HL55 is installed with 1/2 in. diameter bolts, which provide a secure fastening method appropriate for the heavy-gauge steel construction of this connector.

What type of steel and coating does the HL55 use, and is it suitable for treated lumber?

The HL55 is made from 7-gauge steel and finished with a G90 zinc galvanized coating. The G90 galvanized finish provides extra corrosion resistance, making it suitable for use in exposed environments and applications involving treated lumber.

What structural purposes does the HL55 serve?

The HL55 is designed to help connect timber and reinforce right-angle connections while resisting uplift and diagonal forces in wood connections. It is also compatible with Simpson Strong-Tie structural hardware, promoting standardization and construction economy across framing projects.