ISPT: Standard Penetration Test Results

  • Class: Samples, Amalgamated Specimens and Laboratory Test Scheduling
Heading Unit Type Example Description
LOCA_ID   ID 327-16A Location identifier
ISPT_TOP m 2DP 13.5 Depth to top of test
ISPT_SEAT   0DP 14 Number of blows for seating drive
ISPT_MAIN   0DP 35 Number of blows for main test drive
ISPT_NPEN mm 0DP 450 Total penetration for seating drive and test drive
ISPT_NVAL   0DP 35 SPT ‘N’ value
ISPT_REP   X 6,8/8,9,9,9 N=35 SPT reported result
ISPT_CAS m 2DP 12 Casing depth at time of test
ISPT_WAT m XN 2.50 or Dry Depth to water at time of test
ISPT_TYPE   PA S Type of SPT test
ISPT_HAM   X AB1234 Hammer serial number from manufacturer
ISPT_ERAT % 0DP 60 Energy ratio of the hammer
ISPT_SWP mm 0DP 25 Self-weight penetration
ISPT_INC1   0DP 6 Number of blows for 1st Increment (Seating)
ISPT_INC2   0DP 8 Number of blows for 2nd Increment (Seating)
ISPT_INC3   0DP 8 Number of blows for 1st Increment (Test)
ISPT_INC4   0DP 9 Number of blows for 2nd Increment (Test)
ISPT_INC5   0DP 9 Number of blows for 3rd Increment (Test)
ISPT_INC6   0DP 9 Number of blows for 4th Increment (Test)
ISPT_PEN1 mm 0DP 75 Penetration for 1st Increment (Seating Drive)
ISPT_PEN2 mm 0DP 75 Penetration for 2nd Increment (Seating Drive)
ISPT_PEN3 mm 0DP 75 Penetration for 1st Increment (Test)
ISPT_PEN4 mm 0DP 75 Penetration for 2nd Increment (Test)
ISPT_PEN5 mm 0DP 75 Penetration for 3rd Increment (Test)
ISPT_PEN6 mm 0DP 75 Penetration for 4th Increment (Test)
ISPT_ROCK   YN N SPT carried out in soft rock
ISPT_REM   X Borehole topped up with water prior to test Remarks
ISPT_ENV   X Raining Details of weather and environmental conditions during test
ISPT_METH   X BS EN ISO 22476-3 : 2005 Test method
ISPT_CRED   X UKAS 0000 Accrediting body and reference number (when appropriate)
TEST_STAT   X Checked Test status
FILE_FSET   X FS11 Associated file reference (eg test result sheets)

Notes - 2

  • If the test was extended to 100 blows (as described in ISO 22476-3), then data variable under ISPT_ROCK should be ‘Y’. To avoid ambiguity, in cases where the test was not extended the ISPT_ROCK data should be ‘N’ (see Section 8.2).
  • Where appropriate or requested, SPT equipment calibration certificates could be referred to in the FILE field.