Wind Load Calculator – IS 875 Part 3, 2015

Accurate wind load calculation is a non-negotiable step in structural design for any building in India. The Wind Load Calculator by Green Arch World is a structured Excel tool that simplifies this process by following the methodology laid out in IS 875 Part 3, 2015 — the Indian Standard code of practice for design loads due to wind.

What’s Included

• Excel file compatible with Microsoft Excel 2016 and above
• Pre-loaded basic wind speeds for major cities across India as per IS 875 Part 3 Annexure
• Dropdown-driven inputs for terrain category, structure class, and risk coefficient
• Step-by-step calculation of design wind speed (Vz) and design wind pressure (pz)
• All input cells clearly highlighted — red font, grey background — for quick identification
• All non-input cells locked to prevent accidental edits

How to Use

1. Download the Excel file after purchase
2. Select your city to auto-populate the basic wind speed (Vb)
3. Choose terrain category, topography factor, and structure class from the dropdowns
4. Review the k1, k2, k3 risk and multiplier factors — cross-reference with your copy of IS 875 Part 3
5. Design wind speed (Vz) and design wind pressure (pz) are automatically calculated

Key Notes Before Using

• This tool uses Excel’s ‘IFS’ function — verify your Excel version supports it (Excel 2016 and above)
• Always cross-reference inputs with IS 875 Part 3, 2015 to confirm accuracy
• The tool is intended to assist qualified structural engineers and architects — not a substitute for professional judgement

Who Is This For?

• Structural engineers calculating wind loads for building design submissions
• Architects verifying wind load assumptions during schematic design
• Civil engineering students learning IS 875 Part 3 methodology
• Construction professionals preparing structural design documentation for Indian projects

For a custom wind load analysis or structural design consultation for your project, contact us at mail@greenarchworld.com.

Also read: Wind Load Calculation – Based on IS 875 Part 3, 2015