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APPENDIX 2F
MODEL SPECIFICATIONS
Chapter 2
Helical Foundation Systems
7.3 Except where noted otherwise on the project Plans, all piles shall be installed to provide an
ultimate torque-correlated capacity based on an ASD or LRFD analysis. For ASD, a minimum
factor of safety of 2 applied to the service or nominal loading shall be required. When an LRFD
analysis is required, the Owner shall provide applicable pile design information including but not
limited to; factored loads, resistance factors and/or the required ultimate pile capacity. Factors
of safety (ASD) or resistance factors (LRFD) may require modification to meet specific deflection
criteria stated on the Plans or drawings.
7.4 The required ultimate torque-correlated capacity shall be verified at each pile location by
monitoring and recording the final installation torque and applying default torque correlations per
ICC-ES AC358. Site specific torque correlation factors may be determined by field compression
load testing as specified in Section 14.
7.5 Except where noted otherwise on the project Plans, each pile shall be designed to meet a
corrosion service life of 50 years in accordance with ICC-ES AC358.
7.6 The pile design shall take into account group efficiency from pile spacing, pile buckling potential,
soil stratification, and strain compatibility issues.
8
QUALIFICATIONS OF INSTALLING CONTRACTOR AND DESIGNER
8.1 The Installing Contractor and/or Pile Designer shall submit to the Owner, a proposal including the
documentation required in this Section. Work shall not begin until all the submittals have been
received and approved by the Owner. All costs associated with incomplete or unacceptable
submittals shall be the responsibility of the Installing Contractor.
8.2 Evidence of Installing Contractor’s competence in the installation of helical piles shall be
provided to the Owner’s satisfaction and may include any or all of the following:
8.2.1 Pile manufacturer’s certificate of competency for the installation of helical piles,
8.2.2 A list of at least three projects completed within the previous three years wherein the
Installing Contractor installed helical piles similar to those shown in the project Plans.
Such list to include names and phone numbers of those project representatives who
can verify the Installing Contractor’s participation in those projects, and/or
8.2.3 A letter from the pile manufacturer or manufacturer’s representative expressing ability
and intent to provide on-site supervision of the pile installation.
8.3 A listing of all safety violations lodged against the Installing Contractor within the previous three
years and the current status or final resolutions thereof. Descriptions of safety improvements
instituted within the previous three years may also be submitted, at the Installing Contractor’s
discretion.
8.4 Evidence of Pile Designer’s competence shall be provided to the Owner’s satisfaction and may
include any or all of the following:
8.4.1 Registration as a Professional Engineer or recognition by the local jurisdictional authority,
