Question: A 10 m 6 m mat foundation is placed at 2.0 m depth in sand where the average value of N 60 is 23.

A 10 m × 6 m mat foundation is placed at 2.0 m depth in sand where the average value of N₆₀ is 23. Determine the allowable net pressure that would limit the settlement to 75 mm, using Eqs. (9.47) and (10.14).

Eqs. (9.47)

N60 (B + 0.3 F 25 Inet (kN/m²) (for B > 1.22 m) 0.08 В

Eqs. (10.14)

N60 (B + 0.3 F 25 Inet (kN/m) (for B > 1.22 m) 0.08

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