Wind Topography Factor (K₃) Calculation | IS 875 Part 3:2015 Explained

In this video, we learn how to calculate the Wind Topography Factor K₃ for different topographic conditions as per IS 875 (Part 3):2015. This is a very important parameter in wind load calculation, especially when structures are located near hills, ridges, cliffs, or sloping terrains. The concepts are explained in a simple, step-by-step manner with practical understanding and solved examples. 🔹 What you will learn in this video: What is Topography Factor K₃ and why it is important Wind flow over hills, ridges, and escarpments Upwind and downwind conditions explained clearly Hill case and cliff/escarpment case Step-by-step calculation of K₃ as per IS 875 Solved examples for better understanding 📌 Earlier videos in this series: 1️⃣ Design Wind Pressure (Pd) Calculation    • Design Wind Pressure (Pd) Calculation | IS...   2️⃣ Wind Load Calculation for Rectangular Buildings    • Wind Load Calculation for Rectangular Buil...   3️⃣ Wind Load Calculation on Pitched Roof – Part 1 🔗    • Wind Load on Pitched Roof- Part 1 | Truss/...   4️⃣ Wind Load on Pitched Roof – Part 2 (Overhang & Monoslope) 🔗    • Wind Load on Pitched Roof—Part 2 | Overhan...   📘 This video is especially useful for: Civil Engineering students Practicing engineers involved in wind load design 💡 By the end of this video, you will be able to confidently calculate the K₃ factor for different real-life topographic conditions and apply it correctly in wind load analysis. If you find this video helpful, don’t forget to: 👍 Like | 💬 Comment | 🔔 Subscribe #IS875 #WindLoad #TopographyFactor #K3Factor #CivilEngineering #StructuralEngineering #GATE2026 #WindEngineering #DesignEngineers #EngineeringMadeEasy