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Advanced Wind Loading and Cladding Pressure Analysis: Compliant with AS/NZS 1170.2 Wind Zones


This paper introduces Computational Fluid Dynamics (CFD) as an advanced tool for precise wind loading and cladding pressure analysis, specifically tailored to comply with the wind zone classifications of the Australian/New Zealand Standard AS/NZS 1170.2. Wind loading and cladding pressure calculations are critical aspects of building design, influencing structural integrity, occupant safety, and regulatory compliance. We explore the benefits of CFD over traditional methods and its alignment with AS/NZS 1170.2 wind zones, offering comprehensive insights into wind flow behaviour and pressure distribution in different geographic regions. By embracing CFD services and considering specific wind zones, architects, engineers, and construction professionals can optimise their designs, ensuring buildings withstand varying wind intensities while meeting regulatory guidelines.

1. Introduction:

Wind loading and cladding pressure analysis are fundamental considerations in building design, affecting structural integrity and occupant safety. Computational Fluid Dynamics (CFD) presents an innovative approach for precise assessments of wind effects on buildings and cladding systems. This paper highlights the unique capabilities of CFD, its alignment with the Australian/New Zealand Standard AS/NZS 1170.2 wind zones, and its potential to transform wind loading and cladding pressure calculations, specifically tailored to diverse geographic regions.

2. Wind Loading and Cladding Pressure Analysis with CFD:

CFD employs numerical simulations to model airflow around buildings, enabling a comprehensive understanding of wind loading and cladding pressures. By solving fluid dynamics equations, CFD accurately predicts wind flow behaviour, pressure coefficients, and loads on building facades.

Wind velocity contours over a tower

3. Advantages of CFD Services:

  • Detailed Insights: CFD captures intricate flow patterns, providing a thorough analysis of wind behaviour and its impact on cladding surfaces, accounting for localised effects and pressure fluctuations.

  • Versatility: CFD accommodates various building shapes, heights, and cladding materials, making it adaptable for diverse architectural designs and configurations.

  • Cost-Effectiveness: Compared to wind tunnel testing, CFD offers a more efficient and cost-effective approach to analyse wind loading and cladding pressure distributions.

  • Design Optimisation: With CFD, design professionals can identify high-pressure zones and optimise cladding systems to enhance performance and resilience.

Static pressure and cladding pressure contour on the building facade

4. AS/NZS 1170.2 Wind Zones:

AS/NZS 1170.2 classifies regions into different wind zones based on wind speed and intensity. CFD analysis tailored to these wind zones ensures that buildings are designed to withstand specific wind conditions prevalent in their respective geographic locations.

Wind velocity vectors

5. Application and Use Cases:

  • High-Rise Buildings: CFD is particularly valuable for tall structures, providing insights into wind loads and cladding pressures that traditional methods may not adequately capture in different wind zones.

  • Coastal and Inland Areas: CFD analysis tailored to AS/NZS 1170.2 wind zones accounts for the varying wind intensities experienced in coastal and inland regions.

  • Cyclonic Regions: Regions prone to cyclonic events require special consideration, and CFD provides crucial insights to optimise building designs in these high wind intensity zones.

Tower 3D Geometry

6. Seamless Integration:

Our CFD services seamlessly integrate into the wind loading and cladding design process, with a focus on compliance with AS/NZS 1170.2 wind zones. Collaborating with stakeholders, we tailor CFD solutions to address specific project requirements, ensuring an optimised and code-compliant design for diverse geographic locations.

Cladding Pressure data for a Tower according to AS/NZS 1170.2

7. Conclusion:

By leveraging CFD services for wind loading and cladding pressure analysis, specifically aligned with AS/NZS 1170.2 wind zones, professionals in the construction industry gain a competitive edge in designing safe and resilient buildings. The comprehensive insights, versatility, and cost-effectiveness of CFD empower designers to create structurally robust structures while adhering to wind zone classifications and regulatory guidelines. Embracing CFD technology alongside compliance with AS/NZS 1170.2 wind zones showcases a commitment to innovation, safety, and regional adaptability, elevating architectural designs to new heights of performance and sustainability.


  1. Standards Australia and Standards New Zealand. (2011). AS/NZS 1170.2: Structural design actions - Part 2: Wind actions. Sydney, NSW: Standards Australia.

  2. Australian Building Codes Board (ABCB). (2019). Building Code of Australia (BCA) - Volume One and Two. Canberra, ACT: Australian Government.

  3. Australian Building Codes Board (ABCB). (2019). National Construction Code (NCC) - Volume One and Two. Canberra, ACT: Australian Government.

  4. Choi, K., Cho, S., & Lee, I. (2019). Wind Load and Cladding Pressure Calculations on a Tall Building Using CFD Simulation. Energies, 12(20), 3981.


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