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In case of soft soil, a line is drawn from the edge of bottom of old footing at an angle of ___________ with the horizontal.

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In case of soft soil, a line is drawn from the edge of bottom of old footing at an angle of ___________ with the horizontal.

(a) 45°

(b) 60°

(c) 90°

(d) 30°

I had been asked this question by my school teacher while I was bunking the class.

This intriguing question originated from Foundations Based on Different Conditions topic in chapter Foundations of Construction & Building Materials

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Correct choice is (d) 30°

Best explanation: The horizontal spacing between two footing in case of average soil is adjusted by keeping the angle of inclination is 45°. The horizontal spacing of to footing its adjusted in such a way that the edge of bottom of new footing is not intersected by this line.

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