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Penetration Borings

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muuddfun

muuddfun

Geotechnical
Joined
Feb 4, 2008
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Do any of you have information on how to interprete some old caltrans penetration borings, done with a no. 2 Mckiernan-Terry air hammer at 115 psi? The logs show a record of penetration in seconds per foot. They terminate at 300 seconds per foot. Any way to convert this to SPT?

All I could find about the Mckiernan-Terry hammers was for pile driving hammers. Do any of you know about any others?
 
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