Calculate the design wind pressure if the basic wind speed is 44 m/s, risk coefficient is 1, topography factor is 1, terrain is with closely spaced buildings and height of building(class A) = 20m .(a) 1285 N/m^2(b) 1580 N/m^2(c) 1085 N/m^2(d) 1185 N/m^2This question was addressed to me during an internship interview.This key question is from Determination of Wind Loads & Load Combinations topic in division Structural Analysis, Loading and Load Combinations of Design of Steel Structures

Calculate the design wind pressure if the basic wind speed is 44 m/s,

1.	Calculate the design wind pressure if the basic wind speed is 44 m/s, risk coefficient is 1, topography factor is 1, terrain is with closely spaced buildings and height of building(class A) = 20m .(a) 1285 N/m^2(b) 1580 N/m^2(c) 1085 N/m^2(d) 1185 N/m^2This question was addressed to me during an internship interview.This key question is from Determination of Wind Loads & Load Combinations topic in division Structural Analysis, Loading and Load Combinations of Design of Steel Structures
Answer» Correct option is (d) 1185 N/m^2 For explanation: Vb = 44m/s, k1 = 1, K3 = 1, for terrain with CLOSELY spaced buildings, height of building=20m, class A: k2=1.01 (from IS 875 Part 3) VZ = k1k2k3Vb = 1×1.01x1x44 = 44.44 m/s pz = 0.6Vz2 = 0.6x(44.44)2 = 1184.95 N/m^2.

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