Q235
The maximum ratio of span to depth of a slab simply supported and spanning in two directions, is
A.
25
B.
30
C.
35
AnswerD.
40
Answer: Option C
Solution
Answer: Option C
Solution:
Reason: As per IS 456:2000, the basic span-to-effective depth ratio for a simply supported slab spanning in two directions is 35 when mild steel reinforcement (Fe 250) is used.
For HYSD bars: The value is multiplied by a modification factor of 0.8, giving 0.8 × 35 = 28.
Purpose: This limit controls deflection and ensures adequate stiffness of the slab under service loads.