SPT Average N60 Value

The SPT average N60 value is a stepped average of SPT N60 values in the SPT_N60_1 or SPT_N60_2 fields in the CPT_DATA table for each defined depth interval step.

The average of the N60 values is calculated for each depth interval step, and the result is recorded in the SPT_ Average_N60_1 or SPT_Average_N60_2 fields in the CPT_DATA table for each row in that interval step.

The depth interval distance is defined on the SPT_N60_Average_Interval field on CPT_POINT_CORRELATION_PARAMETERS and CPT_PROJECT_CORRELATION_PARAMETERS tables, and is in metres.