The external wind pressure acting on a roof depends on
A. Degree of permeability of roof
B. Slope of roof
C. Both (A) and (B)
D. None of the above
Answer: Option B
Solution (By Examveda Team)
The external wind pressure acting on a roof is influenced by several factors related to the geometry and characteristics of the roof surface.One important factor is the slope of the roof. The angle or pitch of the roof changes the way wind flows over the surface, which affects the magnitude and direction of the pressure acting on it.
Another factor is the degree of permeability of the roof. If the roof allows air to pass through openings or gaps, the airflow pattern and pressure distribution around the roof surface can change.
Therefore, the external wind pressure depends on both the slope of the roof and the permeability characteristics of the roof.
Hence, the correct answer is Option C: Both (A) and (B).
This Question Belongs to Civil Engineering >> Design Of Steel Structures
he slope of the roof (B) alone also is not enough to determine the wind pressure.
Both the slope and the permeability of the roof affect how wind pressure acts.
✅ Correct answer: C. Both (A) and (B)
Degree of permeability will be needed only if the total pressure acting on the wall is asked
Here both b upto (25mm rivet) and C (more than 25mm rivet) option also satisfy the bolt hole dia. So, consider most appropriate answer should be gross dia of hole is A