The allowable stress in axial tension for rolled I-sections and channels, is taken as

ANS:B - 1500 kg/cm2

Allowable stress/Permissible stress:

Axial stress in tension and compression = 0.60fy.
Bending stress in tension and compression = 0.66fy.
Maximum Permissible Bearing stress (at supports)or bending stress in column base = 0.75fy,
Maximum Permissible average shear stress = 0.40fy,
Maximum shear stress = 0.45fy.