search
arrow-left Previous
Next arrow-right
Q: According to IS 456-2000 recommendations, for heavily reinforced concrete members, as in the case of ribs of main beams, the nominal maximum size of the aggregates should usually be restricted to:
  • A. 10 mm
  • B. 20 mm
  • C. 5 mm
  • D. 15 mm
Correct Answer: Option C - As per IS 456 : 2000 Cl 5.3.3.1 for heavily reinforced members as in the case of ribs of main beams, the nominal maximum size of aggregate should usually be restricted to 5 mm less than the minimum clear distance between the main bars or 5 mm less than the minimum cover to the reinforcement whichever is smaller.
C. As per IS 456 : 2000 Cl 5.3.3.1 for heavily reinforced members as in the case of ribs of main beams, the nominal maximum size of aggregate should usually be restricted to 5 mm less than the minimum clear distance between the main bars or 5 mm less than the minimum cover to the reinforcement whichever is smaller.

Explanations:

As per IS 456 : 2000 Cl 5.3.3.1 for heavily reinforced members as in the case of ribs of main beams, the nominal maximum size of aggregate should usually be restricted to 5 mm less than the minimum clear distance between the main bars or 5 mm less than the minimum cover to the reinforcement whichever is smaller.