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Q: The minimum head room over a stair must be:
  • A. 200 cm.
  • B. 205 cm.
  • C. 210 cm.
  • D. 220 cm.
Correct Answer: Option C - The minimum head room over a stair must be 210 cm. (and not less than 2.05 m) • Number of step are not more than 12 and not less than 3 in a flight. • Angle of inclination 250 to 40⁰.
C. The minimum head room over a stair must be 210 cm. (and not less than 2.05 m) • Number of step are not more than 12 and not less than 3 in a flight. • Angle of inclination 250 to 40⁰.

Explanations:

The minimum head room over a stair must be 210 cm. (and not less than 2.05 m) • Number of step are not more than 12 and not less than 3 in a flight. • Angle of inclination 250 to 40⁰.