Shear Strength of Reinforced Concrete Beam

1.Maximum shear stress for M20 concrete is:
2.Shear reinforcement is needed to prevent propagation of:
3.An RC beam of rectangular cross-section having width 285mm and an effective depth of 388mm is provided with shear reinforcement. The maximum spacing of vertical shear stirrups:
4.As per IS 456-2000 the maximum permissible shear stress τc,max is based on: