Most residences do not require pile foundations, but some do, generally because of the combination of the size of the house and the geotechincal stratigraphy (read soft.) In Vulcan’s history this is generally associated with the New Orleans area, but recently a Vulcan #2 was used to drive residential piling in Connecticut. The whole post about this (with video of the #2 in action) is here but above is an areal shot of the rig ready to start driving the timber piles.
vulcanhammer.info 