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A square steel slab base of are 1 m2 is provided for a column made of two rolled channel sections. The 300 mm × 300 mm column carries an axial compressive load of 2000 kN. The line of action of the load passed through the centroid of the column section as well as of the slab base. The permissible bending stress in the slab base is 185 MPa. The required minimum thickness of the slab base is
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- 110 mm
- 89 mm
- 63 mm
- 55 mm
Correct Option: D
Projection at sides,
| a = b = | = 350 mm | 2 |
| w = | area |
| = | = 2 N/mm2 | (1000)2 |
Thickness of slab,
= 55 mm
