4 zones
5 zones
6 zones
7 zones
Answer is Right!
Answer is Wrong!
The correct answer is:
A. 4 zones
As per IS : 875, for the purposes of specifying basic wind velocity, the country has been divided into 4 zones.
The zones are:
- Zone I: Plains
- Zone II: Hills
- Zone III: High Hills
- Zone IV: Very High Hills
The basic wind velocity is the mean hourly wind velocity at 10 m above the ground. It is used in the design of structures to resist wind loads.
The basic wind velocity is determined by the following factors:
- The geographical location of the structure
- The height of the structure
- The type of structure
- The occupancy of the structure
The basic wind velocity is specified in IS : 875. The values of the basic wind velocity for different zones are given in the following table:
Zone | Basic wind velocity (km/h)
——- | ——–
I | 30
II | 35
III | 40
IV | 45