Two columns Ca and Cb spaced 3 m centre to centre are subjected to axial loads of 600 kN and 800 kN, respectively. IF good soil for foundation with safe bearing capacity as 200 kN/m2, is available at 2 m depth below the ground level, identify the type of foundation that is suitable and economical. Assume width of footing restricted to 2 m.
1
Grillage foundation
2
Mat foundation
3
Isolated footing
4
Pile foundation