Permissible stresses in concrete and steel reinforcement

The allowable stresses for direct toward different grades of concrete are as follow :-

  • M15 grade of concrete = 4.0
  • M20 grade of concrete = 5.0
  • M25 grade of concrete = 6.0
  • M30 grade of concrete = 8.0
  • M40 grade of concrete = 10.0
  • M45 grade of concrete = 11.0
  • M50 grade of concrete = 12.0