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WorksheetsDAY 30 WORKSHEET ITI (Stair )
Total questions: 15
Worksheet time: 8mins
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.
The height of hand-rail for fire-escape stairs shall be between ________ cm and ________ cm.
100 cm and 120 cm
120 cm 100 cm and 120 cm
Minimum clear head-room required in any staircase = (a) m.
The number of risers for a floor = ________ / ________; and number of treads = risers – 1.
(a)
Match the Following
| A. Min stair width | 1. 30 cm |
| B. Max riser height | 2. 1 m |
| C. Min tread width | 3. 15 cm |
| D. Fire-escape stair width | 4. 120 cm |
A–4, B–3, C–1, D–2
A–4, B–1, C–3, D–2
A–4, B–3, C–2, D–1
A–4, B–1, C–3, D–2
VI. Match the Following – Set 2 (NBC Provisions)
| A. Min tread without nosing | 1. ≤ 16 per flight |
| B. Max riser height | 2. 190 mm (for dwelling) |
| C. Max risers per flight | 3. 150 mm |
| D. Min head-room | 4. 2.2 m |
A–3, B–2, C–4, D–1
A–3, B–1, C–2, D–4
A–3, B–2, C–1, D–4
A–2, B–3, C–1, D–4
