As per IS 875 (Part 2), for the design of a residential building, the imposed load on the floors of dwelling units is generally taken as
- A1.5 kN/m2
- B3.0 kN/m2
- C2.0 kN/m2Correct
- D5.0 kN/m2
Solution
Concept
Imposed Load for Residential Buildings (IS 875 Part 2)
Formula
N/A
Step-by-step solution
1. Identify the question regarding the specified design imposed load for residential dwelling unit floors as per IS 875 (Part 2). 2. Recall that IS 875 (Part 2) prescribes a standard live load of 2.0 kN/m² for residential dwelling units. 3. Select Option C as the correct choice.
Explanation
As per IS 875 (Part 2), the standard minimum design live load (imposed load) specified for regular rooms and dwelling units in residential buildings is 2.0 kN/m². Option C (2.0 kN/m²) is the correct code-prescribed value to account for the typical weight of occupants, furniture, and daily household activities safely.
Shortcut
To easily remember the imposed load for residential dwelling units, use the memory rule "Resi-TWO-ntial": - Resi-TWO-ntial = 2.0 kN/m²: Associate residential dwelling unit floors with "2" (2.0 kN/m²). - Corridors/Stairs = 3.0 kN/m²: Higher traffic areas need 1.0 kN/m² extra (2 + 1 = 3).
Common mistake
A common mistake is selecting option A (1.5 kN/m²) by confusing the imposed load for accessible roofs with that of residential dwelling floors. Another frequent error is selecting option B (3.0 kN/m²) by confusing the standard room load (2.0 kN/m²) with the higher values specified for residential corridors, staircases, or kitchens.
Correct answer: C) 2.0 kN/m2