GATE 2026 AR — Planning – Question 14

Building Construction, Materials, and Structural Systems · Fire protection · 1 mark · Multiple choice

Under the National Building Code of India 2016, the minimum fire resistance of service ducts and shafts is how many minutes?

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Correct answer: (C) 120

Explanation

The stated NBC 2016 requirement is 120 minutes, or two hours, so C. Enclosing vertical service routes with the required fire resistance helps limit rapid fire and smoke spread between floors. This is the enclosure rating asked in the source, not an evacuation-duration calculation.

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