Helical pier

Seismic upgrades
and retrofit

Helical piers and brackets are an efficient means of providing additional  compressive capacity to spread footings in some soil conditions.  Piers can be installed in limited space with hand held equipment if necessary. 

Limitations to helical pier in uplift loading may however restrict usage for seismic applications.  Uplift resistance is not possible with bracket assemblies due to the attachment of the bracket to the footing.

Helical piers with connections into new footings may also be less desirable for some cyclic loading applications where uplift resistance is necessary.   Connections between extensions may be undesirable for some assemblies as the bolted joints may allow significant movements upon load reversals with little resistance.

Quick Reference

Helical piers

Micro piles