It may seem odd on this site, but we present the Delmag Guide to Driving Sheet Piles, which Delmag (a one-time competitor of Vulcan’s) put out many years ago. It’s a nice and comprehensive guide to the subject for impact hammers; it’s a subject that’s not always well understood.
Diesel hammers (in Europe at least, more often in the US these days) are run with leaders behind the hammer, as was the case with the Nilens hammers and also with the Russian diesel hammers. Some examples of each of these are shown below.
For vibratory hammers, some information about this is here: Installation and Extraction of Metal Sheet Piling.
vulcanhammer.info 
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