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A21 Illustration
A21 Illustration
A23 Illustration
A23 Illustration

The A21 and A23 Reinforced Angle Brackets provide a way to make a straight angle of 90° connection. The A21, A23 L shape angles are load rated, providing the correct thickness and number of fasteners. These angles also have well-defined fastener locations, and testing ensures that the tabulated load values account for connection eccentricities. 

Material

Carbon Steel 1.3mm thick

Finish

Z275 Galvanised

Features & Benefits
  • Removes the guesswork for making perfectly square connections
  • Reinforces 90-degree connections
  • Stronger than angled nailing or screw fastening
  • Staggered fastener pattern reduces the chances of timber splitting
Installation
  • Use all specified fasteners
Model No. Table

Model No.

Dimensions (mm)

Fasteners
(No. – Length x Dia., mm)

Country

Design Capacity (kN)

W1

W2

Base

Post

F15

F2

A21

50

40

2 – 38 x 3.75

2 – 38 x 3.75

AU

k1 = 1.14

k1 = 1.14

1.03

0.43

NZ

k1 = 1.0

k1 = 1.0

0.97

0.41

A23

50

40

4 – 38 x 3.75

4 – 38 x 3.75

AU

k1 = 1.14

k1 = 1.14

1.33

1.77

NZ

k1 = 1.0

k1 = 1.0

1.33

1.66

  1. Design Capacity is the lesser of (1) the Characteristic Capacity multiplied by the Australian Capacity Factor, or the NZ Strength Reduction Factor (φ), and applicable the k modification factors following AS 1720.1 and NZS 3603 and (2) the Serviceability Capacity which is the load at 3.2mm joint slip. Design Capacity is the minimum of test data and structural joint calculation.
  2. For Australia, the Capacity Factor (φ) is 0.85 for nails and screws for structural joints in a Category 1 application. Reduce tabulated values where other Category applications govern. For NZ, the Strength Reduction Factor (φ) is 0.80 for nails in lateral loading.
  3. Duration of Load Factor (k1) is as shown. Reduce Duration of Load Factor where applicable. Capacities may not be increased.
  4. Timber species for joint design is seasoned Radiata Pine, which is Australia Joint Group JD4 per AS 1720.1 Table H2.4 and New Zealand Joint Group J5 per NZS 3603 Table 4.1.
  5. Connectors are required on both sides to achieve F1 loads in both directions.
  6. For simultaneous loads in more than one direction, the connector must be evaluated using the Unity Equation. See General Note 'e' on page 15.
 
Brochures & Catalogues
Technical Data & Docs

Technical Data Sheets

PDF icon Technical Data Sheet - A21 & A23

Warranty

Warranty

CAD Library
Masterspec
Alternative Products

Alternative Products

E5_Reinforced Angle Bracket

E5 Reinforced Angle Bracket is suitable for structural applications in framing and timber-frame houses for general connecting of timber at 90° angles. Typical applications include fixing trusses, studs, purlins, beams and posts.

GA1

To provide more consistent, straight corners, Simpson Strong-Tie offers a wide variety of angles in various sizes and thicknesses to handle light-duty jobs or projects where a structural connection is needed.

The A21 and A23 Reinforced Angle Brackets provide a way to make a straight angle of 90° connection. The A21, A23 L shape angles are load rated, providing the correct thickness and number of fasteners.

A34

The versatile A34 and A35 Reinforced Angle Brackets provide a way to make a straight angle of 90° connection. The A35 Angle Bracket’s exclusive bending slot allows instant, accurate field bends for two and three-way ties.

Inspiration
Request a Demo

Request a Demo/Sample

Experience the innovation design of Simpson Strong-Tie's products and how we can help you build safer, stronger structures. Please fill out your details and submit the form below. We’ll be in touch to schedule a time to talk and give you a personal demo of Simpson Strong-Tie products.

Request a Demo/Sample

Experience the innovation design of Simpson Strong-Tie's products and how we can help you build safer, stronger structures. Please fill out your details and submit the form below. We’ll be in touch to schedule a time to talk and give you a personal demo of Simpson Strong-Tie products.

Structural Connections

 

Unmatched Quality from the Truss to the Foundation

With nearly 60 years of field and R&D experience, Simpson Strong-Tie® timber connectors are manufactured to the industry's highest standards. From framing angles to straps to heavy-duty joist hangers, we offer the most diverse product line so that you have the right product for the job.

Simpson Strong-Tie® connectors offer unmatched quality with laboratory and field testing, and are backed by our uncompromising commitment to customer service. As the company that built the connector industry, you can count on Simpson Strong-Tie® to work closely with builders, engineers and building officials to deliver innovative, building code-compliant solutions to help build safer, stronger structures economically. Download the Timber Connectors NZS 3604 Catalogue.

Timber Connectors

From testing to service to availability, everything we do is engineered to ensure your project's success. With every product, you know you are getting the quality, value, service and on-time delivery that we have built our reputation on for the past 60 years.

From straps and ties to joist hangers and much more, Simpson Strong-Tie® structural connectors increase the strength and safety of timber-frame structures. Each connector is unique to Simpson Strong-Tie and is designed for specific applications without the need to adapt metal plating to suit a connection. Download the Timber Construction Connectors Catalogue.

Steel Frame Connectors

From fully tested and engineered connectors and clips Simpson Strong-Tie® provides comprehensive structural solutions for cold-formed steel construction. From steel-to-steel connections to full-scale lateral solutions and curtain wall connectors, we remain committed to developing new technology that helps to advance the cold-formed steel industry.

Find out how Simpson Strong-Tie timber connectors can help you build the right way every day. Download the Cold-Fromed Steel Construction Connectors Catalogue.