Axial Geotechnical Resistance Design of Driven Piles
= Unconfined compression strength of the soil in tsf. Note that Q. U. is input in tsf and q. S. is output in ksf. If Q. U > 3 tsf and N > 30, treat as granular and use Hard Till equations. • Nominal Unit Side Resistance (q S) of rock, shall be calculated using the equations below for the type of rock encountered: q S = 12.0 ksf. for Shale . q ...