BC22•BeBased on Insitu Tests:oSome insitu tests allow direct correlation to bearing capacity, potentially superioroSPT is a calibrated method developed by Meyerhof (1974) and modified by Bowles (1996)and uses chart below.N used in equations is an average over range of 0.58 above footingto 2B below footing.Method includes a factor for depth (O/B).For B in feet:qa,ksf=(N551wdifBs4ft2.5]'where Kd=(1+O.331t-)S1.33o123456FIgure4-7Allowable bearing capacity for surface-loaded footingswith settlement limited to approximately 2S rom. Equation used is shownGnfigure.800700600SOlI300200100IN,sII1IIIIII4.=o.os4=N"e+O.3Y(1+o.33~)-~·0.08 B B~for, 0 SDSBandB>1.2 mi"~""'----f\..........--N=40,"..........r----~35"'-I"
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International System of Units, United States customary units, SPT, allowable bearing capacity, insitu tests