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(304) 865-4841


P.O. Box 522, Luna Pier, MI 48157,

Construction Office Located in Vienna, WV

Copyright 2017 - 2019 Structural Foundations, Inc., all rights reserved.

Licensed general contractor # WV056746


Available as a subcontractor in most states and localities

Validated Performance

  • Third-party validated performance
  • Withstood 100% of design loads

The National Wind Technology Center (NWTC), a department of the National Renewable Energy Laboratory (NREL), conducted a Cooperative Research and Development Agreement (CRADA) on our custom foundation installation for a 50kW wind turbine in Colorado. The CRADA was prepared by Dave Corbus and Jason Cotrell, and released May 17, 2004. It also evaluated the viability of our installation for large and small wind turbines. Significantly:


“[The] bearing foundation is unique among wind turbine foundations in that the foundation strength is proven during the installation process as the hydraulically applied installing load is the same as the uplift and bearing capacities. Another unique feature of the foundation is the ability to increase the natural bearing capacity of the soil, the installation test was designed to show the system’s ability to greatly increase this bearing capacity within the load bearing zone of influence.”


“The confined compressive strength of the soil was increased 3.4 times during installation of the foundation.”


“Further testing would not be required, as the bearing foundation system exceeded all of the design requirements. It is recommended that the bearing foundation system be considered for use in appropriate wind turbine applications.”