As per IS 1893, the Zone Factor (Z) for a building located in Zone V is taken as
- A0.1
- B0.16
- C0.24
- D0.36Correct
Solution
Concept
Seismic Zone Factor (IS 1893)
Formula
N/A
Step-by-step solution
1. Review the seismic zone factors specified in IS 1893. 2. Recall that Zone V represents the highest seismic risk region and is assigned a Zone Factor (Z) of 0.36. 3. Select Option D as the correct answer.
Explanation
As per IS 1893, India is divided into four seismic zones (II, III, IV, and V) to estimate earthquake risk. Zone V represents the area with the highest risk of severe ground shaking. Each zone is assigned a Zone Factor (Z), which represents the peak ground acceleration expected during a maximum earthquake. For Zone V, the highest risk area, the Zone Factor (Z) is specified as 0.36.
Shortcut
To quickly remember the Seismic Zone Factors (Z) under IS 1893: - Zone II = 0.10 - Zone III = 0.16 (Increase of 0.06) - Zone IV = 0.24 (Increase of 0.08) - Zone V = 0.36 (Increase of 0.12)Memory Rule: Note the step increases in decimals—6, 8, 12 (or associate Zone V directly with 0.36 as 6 squared / max risk).
Common mistake
A common mistake is confusing the Zone Factor values among different seismic zones, such as selecting Option C (0.24) by mistaking Zone V for Zone IV, or selecting Option A (0.10) / Option B (0.16) by confusing Zone II or III factors.
Correct answer: D) 0.36