Helical Piers - Underpinning

Underpinning is used to stabilize foundations or to retrofit an existing building to increase load capacity, Piles are installed at intervals around the perimeter at affected locations. Independent of the structure, the piles are extended to depths, which attain the installing torque correlated to the required load bearing capacity.

Special brackets are located where needed around the perimeter and secured to the concrete foundation. A pile is then torqued into the soil and connected to each bracket. The brackets permit lifting by hydraulic jacks. Tightening the nuts on the vertical bolts of the bracket locks off the load.