Could someone clarify a comment given in a soils report about the factor of safety? A soils report gives cast-in-place pile a allowable bearing capacity is in undisturbed silt till of 360 kPa. Later in the report it states that "normally a factor of safety of 3 should be allowed in calculations of safe loading value of end bearing piles and to ensure that settlements remain within the previously noted limits".
Do I take 3 x 360 = 1080 kPa and compared that against my factored loads (limit states design), or used unfactored load and compare it against 360 kPa?
Thank you in advance for your support!
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