Quiz on Criteria for Structural Safety of Tall Concrete Buildings ( BIS Code 16700:2023)
1. According to IS 16700:2023, what is the defined height range for a ‘Tall Building’?
A. Greater than 50 m, but less than or equal to 200 m
B. Greater than 50 m, but less than or equal to 250 m
C. Any building with a height greater than 100 m
D. Any building with more than 15 floors
2. What is the maximum inter-storey lateral drift ratio permitted under serviceability loads (e.g., wind load with a 20-year return period)?
A. 1/250
B. 1/400
C. 1/500
D. H/500
3. As per the standard, what is the minimum grade of concrete that shall be used in tall concrete buildings?
A. M 25
B. M 30
C. M 35
D. M 40
4. For residential buildings, what is the maximum permissible peak combined horizontal acceleration (aMax) under wind loads with a 10-year return period for serviceability?
A. 0.15 m/s²
B. 0.18 m/s²
C. 0.25 m/s²
D. 0.003 rad/s
5. In structural analysis for strength design, what is the effective moment of inertia (Ieff) that should be considered for beams?
A. 0.70 Ig
B. 0.50 Ig
C. 0.35 Ig
D. 0.25 Ig
6. The thickness of a structural wall shall not be less than which of the following?
A. 150 mm or hi/25, whichever is larger
B. 160 mm or hi/20, whichever is larger
C. 200 mm or hi/15, whichever is smaller
D. 180 mm or hi/20, whichever is larger
7. For a tall building with a raft foundation that is not resting on hard rock, what is the minimum required embedded depth?
A. 1/10 of the height of the building
B. 1/15 of the height of the building
C. 1/20 of the height of the building
D. 1/25 of the height of the building
8. A ‘Key Element’ is an element whose failure would cause a disproportionate collapse. This collapse area is defined as being greater than:
A. 50 m² or 10 percent of the storey area, whichever is lesser
B. 70 m² or 15 percent of the storey area, whichever is lesser
C. 100 m² or 20 percent of the storey area, whichever is greater
D. 70 m² or 15 percent of the storey area, whichever is greater
9. For a building with a height of 100 m located in seismic zone V, what is the minimum design base shear coefficient?
A. 1.6 %
B. 1.75 %
C. 2.4 %
D. 1.1 %
10. When designing for the ‘backstay effect’ in buildings with a podium, what is the minimum specified thickness for the backstay diaphragm floor slab?
A. 125 mm
B. 150 mm
C. 200 mm
D. 250 mm
11. The standard is not applicable for buildings in the near-field of seismogenic faults. What distance defines this ‘near-field’?
A. 5 km from a fault
B. 10 km from a fault
C. 15 km from a fault
D. 20 km from a fault
12. For a “Structural Wall + Framed Tube” system in Seismic Zone IV, what is the maximum permitted slenderness ratio (Ht/Bt)?
A. 8
B. 9
C. 10
D. 12
13. The lateral strength of any given storey in a tall building must not be less than what percentage of the strength of the storey immediately above it?
A. 70 percent
B. 80 percent
C. 90 percent
D. 100 percent
14. To ensure torsional stability, the natural period of the building’s fundamental torsional mode of vibration should not exceed:
A. The fundamental translational period
B. 0.9 times the smaller of the fundamental translational periods
C. 1.2 times the smaller of the fundamental translational periods
D. 0.7 times the second translational period
15. For a precast floor system in Seismic Zone III, what is the minimum required thickness for the structural concrete topping?
A. 50 mm
B. 75 mm
C. 100 mm
D. No topping is required
16. The standard recommends using mechanical couplers to extend longitudinal bars in RC columns of the lateral load resisting system when:
A. The building is in Seismic Zone V
B. The bar diameter is 16 mm or higher
C. The bar diameter is 20 mm or higher
D. The concrete grade is above M60
17. Site-specific wind tunnel studies are mandatory for buildings when their natural period is greater than:
A. 3 seconds
B. 5 seconds
C. 8 seconds
D. 10 seconds
18. To ensure stability against second-order P-Δ effects, the inter-storey drift stability coefficient (θ) must be less than or equal to:
A. 0.10
B. 0.20
C. 0.25
D. 0.33
19. In all seismic zones, how should the stiffness of flat slab-column frames be considered in the analytical model for lateral load resistance?
A. It shall be ignored
B. Modelled with 25% of its gross stiffness
C. Modelled with 50% of its gross stiffness
D. It should be fully included in the model
20. In a tall building with a podium, if the tower has a plan irregularity like re-entrant corners, seismic forces for designing collector elements must be amplified by a factor of:
A. 1.2
B. 1.5
C. 2.0
D. 2.5
21. A moment frame structure providing lateral load resistance must have at least two planar frames, each with a minimum of:
A. 2 bays
B. 3 bays
C. 4 bays
D. 5 bays
22. What is the maximum longitudinal reinforcement percentage allowed in a coupling beam that has a span-to-depth ratio of less than 1.0?
A. 0.6 percent
B. 1.0 percent
C. 1.2 percent
D. 1.5 percent
23. For structural walls in Seismic Zones IV and V, the minimum transverse reinforcement shall not be less than:
A. 0.20 percent of gross cross-sectional area
B. 0.25 percent of gross cross-sectional area
C. 0.40 percent of gross cross-sectional area
D. 0.50 percent of gross cross-sectional area
24. In a framed-tube structural system, the spacing of columns should preferably be no more than:
A. 3 m
B. 4 m
C. 5 m
D. 6 m
25. A factor of safety of 2.5 shall be provided against overturning and sliding under which load condition?
A. Unfactored design wind load and gravity load
B. 1.5 times design earthquake load and unfactored gravity load
C. Design wind load and 1.5 times gravity load
D. 2.5 times design earthquake load and unfactored gravity load
26. For raft foundations on soil, the maximum vertical settlement is limited to 125 mm, provided the maximum angular distortion of the raft does not exceed:
A. 1/250
B. 1/400
C. 1/500
D. 1/750
27. When designing non-structural elements, what is the importance factor (Ip) for components containing hazardous materials?
A. 1.5
B. 2.0
C. 2.5
D. 3.0
28. All tall buildings in Seismic Zone V are required to be instrumented. In which other zones is this instrumentation mandatory for buildings over 150 m?
A. Zone II only
B. Zones III and IV
C. Zone IV only
D. All other zones
29. Which of the following conditions would require a tall building’s design to be reviewed by a Structural Design Review (SDR) panel?
A. The building’s plan aspect ratio is 4.5
B. The minimum concrete grade used is M30
C. The building has a transfer structure in its lateral load resisting system
D. The building height is 245 m in Seismic Zone II
30. To control the evolution of high heat of hydration in mass concrete elements like thick shear walls, the thermal gradient within the concrete mass should not exceed:
A. 15 °C
B. 20 °C
C. 25 °C
D. 30 °C
Answer Key
-
B
-
C
-
B
-
B
-
C
-
B
-
B
-
B
-
C
-
B
-
B
-
B
-
C
-
B
-
B
-
C
-
B
-
B
-
A
-
B
-
B
-
A
-
B
-
C
-
D
-
C
-
C
-
B
-
C
-
B
-
Disclaimer
We are not responsible for the accuracy of job postings on our website. Website users/visitor must verify information independently before taking action. We are not liable for any loss or damage resulting from the use of this information.