The Minimum Number of Main Steel Bars Provided in R.C.C.

By Aina Parasher|Updated : July 15th, 2022

The minimum number of main steel bars provided in R.C.C.-

  1. Rectangular columns is 4.
  2. Circular columns is 6.
  3. Octagonal columns is 8.
  4. All the above.

Answer: D. All the above

The minimum number of main steel bars provided in R.C.C. is 4 for rectangular columns, 6 for circular columns and 8 for octagonal columns.

Solution

The main steel bar in RCC should be such that it ensures the bonding between concrete and steel. 

As per IS 456: 2000 clause 26.5.3.1 minimum longitudinal steel reinforcement for the column is 0.8% of the gross area of the column section. And maximum longitudinal steel reinforcement for the column is 6 % of the gross column area.

  • In rectangular column, a minimum of 4 longitudinal bars are required.
  • In circular column, a minimum of 6 longitudinal bars are required.
  • In octagonal column, a minimum of 8 longitudinal bars are required.

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