As per IS 875 Part 3, the design wind speed Vz at height z is computed using the basic wind speed V_b multiplied by:
Choose the correct answer
A risk factor k1 only
Risk factor k1, terrain/height/size factor k2, and topography factor k3
Wind pressure coefficient Cp only
Height factor only
Correct Answer
B. Risk factor k1, terrain/height/size factor k2, and topography factor k3
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IS 875 Part 3: Vz = Vb x k1 x k2 x k3. k1 = risk coefficient (design life), k2 = terrain, height and structure size factor, k3 = topography factor. Design wind pressure p_z = 0.6 Vz^2 (N/m2).
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