engfanatic.tumcivil.comRecord number of blows with groove closes by 0.5 inch. Repeat Steps 2 to 7 at...
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engfanatic.tumcivil.comRecord number of blows with groove closes by 0.5 inch. Repeat Steps 2 to 7 at least 4-5 times to obtain number of blow between 15 and 35. Calibration: Height