have to place temporary supports while you do the excavation. In
this case the finished project included a steel I-beam to carry
the weight of the house. The plumbing lines as well as heating and
cooling ducts must also be supported.
months we had removed 120 dump truck loads of material to create
a 2,000 square foot basement addition. The basement has eleven foot
high ceilings, a one foot thick slab, with 48 bell bottom piers,
sunk ten feet deep with ten inch thick walls.