Design the steel plate lagging $($i$.$e$.$ the plate thickness$)$ for a soldier pile system where the site

has Dense Sandy Silt.

Soil Unit Weight $=$ Go look this up in the class materials provided

Cohesion c $=225$ psf

Internal Angle of Friction $=$ Go look this up in the class materials provided

Soldier Pile Spacing $=12\text{'}$ O$.$C$.$

A$36$ Steel where $Fb=0\mathrm{.}6Fy$

Factor of Safety $=2\mathrm{.}5$