The Simpson TA9Z-R 8-1/4 in. 12-Gauge ZMAX Galvanized Staircase Angle is a structural connector from Simpson built specifically for staircase framing applications that demand both strength and long-term durability. Designed to replace time-consuming stringer notching, this staircase angle preserves the full depth and load-bearing capacity of stair stringers while creating a reliable, secure connection. Its ZMAX zinc coating provides extra corrosion resistance beyond standard galvanization, making it a practical choice for exterior stair framing and installations involving pressure-treated lumber. The narrow profile also makes it equally capable as a heavy-duty 90 deg. connector wherever tight spaces call for a compact angle bracket.

Key Features

• Eliminates complicated stringer notching - preserves the full structural depth of stair stringers, reducing the risk of weakening them during installation
• Engineered for structurally sound staircase framing - provides a code-friendly, reliable connection between stringers and framing members without improvised joinery
• Also ideal for heavy-duty 90 deg. connections where a narrow angle is needed - versatility beyond stair framing means this connector handles demanding right-angle joints in tight framing conditions
• Made from 12-gauge steel - heavy-gauge construction delivers the rigidity and load capacity required for structural framing connections
• ZMAX galvanization offers extra corrosion resistance for exterior and treated-wood applications - the thicker zinc coating stands up to moisture and the chemicals present in pressure-treated lumber, extending the service life of the connection
• Installs with Strong-Drive SDS Heavy-Duty Connector screws - a defined fastener specification takes the guesswork out of hardware selection and helps ensure a properly rated installation

Why This Product

• Protects stringer integrity without extra labor - by eliminating the need for notch cuts, this stair connector keeps stringers at full depth and strength, saving time on the job while producing a more structurally sound staircase than traditional notching methods allow
• Built for the conditions where stair hardware actually lives - ZMAX zinc coating delivers corrosion resistance specifically suited for outdoor stair framing and pressure-treated lumber, going beyond what standard galvanized connectors offer in demanding environments
• Doubles as a heavy-duty right-angle connector - the narrow profile makes this angle bracket useful well beyond staircase applications, giving contractors a single connector that handles structural 90 deg. connections in confined framing situations
• Backed by a trusted name in structural connectors - Simpson has a long-standing reputation for engineering connectors to meet structural requirements, so builders and contractors can specify this product with confidence in its design intent and performance

Specifications

• Model Number: TA9Z-R
• Length: 8-1/4 in.
• Gauge: 12
• Coating: ZMAX
• Finish: ZMAX
• Country of Origin: United States

Approved Applications

• Structurally sound staircase framing connections
• Heavy-duty 90 deg. connections where a narrow angle is needed
• Exterior and treated-wood applications where moisture or corrosion resistance is required

Install With

• Installs with (5) 1/4 in. x 1-1/2 in. Strong-Drive SDS Heavy-Duty Connector screws (Model: SDS25112)

Frequently Asked Questions

Why does the TA9Z-R eliminate the need for stringer notching?

The TA staircase angle is designed to provide a direct structural connection between the stair stringer and framing member, removing the need for traditional notch cuts. Notching can weaken the stair stringer, so using this angle maintains the full depth and strength of the stringer while still creating a secure, code-friendly connection.

What makes the ZMAX coating different from standard galvanization?

ZMAX is a thicker zinc coating that provides extra resistance against corrosion compared to standard G90 galvanization. This makes the TA9Z-R especially well suited for exterior installations and projects involving pressure-treated lumber, where contact with moisture and treatment chemicals can accelerate corrosion on lesser-coated hardware.

What fasteners are required to install the Simpson TA9Z-R?

The TA9Z-R installs with (5) 1/4 in. x 1-1/2 in. Strong-Drive SDS Heavy-Duty Connector screws (Model: SDS25112).

Can the TA9Z-R be used for applications other than staircase framing?

Yes. In addition to staircase framing, the TA9Z-R is also ideal for heavy-duty 90 deg. connections where a narrow angle is needed, making it a versatile connector for a range of structural framing projects.