sc Cc [Ho(1 eo)] log [(sขvo sv)sขvo]
sc (0.83)[(2 m)(1 1.1)] log [(150 kPa 37 kPa)150 kPa] 0.076 m 7.6 cm
Part 2)
Using the following value for H Ho 2 m
Turning the rectangular foundation into an equivalent round foundation, or:
Area (B)(L) (20 m)(30 m) 600 m2
14 pB2 600 m2 or B 28 m