The permissible bending stress in the slab base of steel columns for all grades of steel is limited to

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UKPSC AE Civil 2013 Official Paper I

Answer 1

Permissible stresses in steel structure members:

S.No.	Types of stress	Permissible stress (MPa)	Factor of safety
1	Axial Tensile stress	0.6 fy	1.67
2	Maximum axial compressive stress	0.6 fy	1.67
3	Bending tensile stress	0.66 fy	1.515
4	Maximum bending compressive stress	0.66 fy	1.515
5	Average shear stress	0.4 fy	2.5
6	Maximum shear stress	0.45 fy	2.22
7	Bearing stress	0.75 fy	1.33
8	Stress in slab base	185	-

∴ The permissible bending stress in the slab base of steel columns for all grades of steel is limited to 185.