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Question
For design of a roof truss, if the design wind velocity is 20 m/s, what is the design wind pressure?
A.
400 N/m2
B.
40 N/m2
C.
240 N/m2
D.
200 N/m2
Answer ( Option C)

240 N/m2

Solution

Design wind pressure (PZ) 
PZ = Design wind pressure in N/m2 at height Z.
∴ PZ = 0.6 × 202 = 240 N/m2

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