DAY 30 WORKSHEET ITI (Stair )

The maximum travel distance permitted between two staircases in a building (as per KMBR 2019) is —

• 40 m

• 50 m

• 60 m

• 80 m

For residential buildings, the maximum riser height and minimum tread width as per KMBR 2019 are —

• 17 cm and 28 cm

• 15 cm and 30 cm

• 19 cm and 25 cm

• 20 cm and 25 cm

The minimum hand-rail height prescribed for a standard stair in KMBR is —

• 75 cm

• 90 cm

• 100 cm

• 120 cm

According to NBC, the minimum tread width (without nosing) for a general stair is —

• 250 mm

• 275 mm

• 300 mm

• 350 mm

A fire-escape stair should not exceed ________ risers per flight, and each riser shall not be less than ________ cm.

• 14, 17

• 12, 18

• 16, 19

• 18, 20

TRUE OR FALSE

Escalators may be used instead of staircases, provided their width is not less than 1 m.

• True

• False

TRUE OR FALSE

As per NBC, in a one-family dwelling, the maximum riser height may be increased to 200 mm.

• True

• False

Assertion (A): Every building with more than three floors must have at least two staircases, one of which may be a fire-escape. Reason (R): This is to provide safe evacuation during emergencies and avoid excessive travel distance.

• Both A and R are true, and R is the correct explanation of A

• Both A and R are true, but R is not the correct explanation of A

• A is true, R is false

• A is false, R is true

Minimum width of stair in any building (as per KMBR 2019) = (a)   cm.

As per KMBR, the minimum width of fire-escape staircase = (a)   m.