A braced cut, 5m wide and 7.5 m deep is proposed in a cohesionless soil deposit having effective cohesion c’=0 and effective friction angle,$\phi$’=360. The first row of struts is to be installed at a depth of 0.5 m below ground surface and spacing between the struts should be 1.5 m. If the horizontal spacing of struts is 3 m and unit weight of the deposit is 20 kN/m3, the maximum strut load will be
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