As per IS 875 (Part 2) – 1987, what is the minimum imposed load that needs to be considered for living rooms ?
- Audl = 3 kN/m²; concentrated load = 4·5 kN
- Budl = 4 kN/m²; concentrated load = 2·7 kN
- Cudl = 2·5 kN/m²; concentrated load = 2·7 kN
- Dudl = 2 kN/m²; concentrated load = 1·8 kNCorrect
Solution
Concept
Minimum imposed loads on floors
Step-by-step solution
1. For residential buildings (dwelling houses), all living rooms, bedrooms and similar spaces: UDL = 2.0 kN/m². 2. The concentrated load is 1.8 kN.
Explanation
IS 875 Part 2 gives 2 kN/m² and 1.8 kN for living rooms of residential buildings. Corridors, stairs and balconies are designed for higher intensities.
Why the other options are wrong
Values of 3, 4 and 2.5 kN/m² are higher than the minimum specified for living rooms; they apply to other occupancies and areas such as corridors and assembly floors.
Shortcut
Living rooms: 2 kN/m² and 1.8 kN.
Common mistake
Taking the corridor load of 3 kN/m².
Correct answer: D) udl = 2 kN/m²; concentrated load = 1·8 kN