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p 148
APPENDIX 2F
MODEL SPECIFICATIONS
Chapter 2
Helical Foundation Systems
10.3 Top elevation of the helical piles shall be within 2 inches of the design vertical elevation.
11
PILE INSTALLATION
11.1 Installing Contractor shall furnish and install all helical piles per the project Plans and approved
pile design documentation. In the event of conflict between the project Plans and the approved
pile design documentation, the Installing Contractor shall not begin construction on any affected
items until such conflict has been resolved.
11.2 The Installing Contractor shall conduct their construction operations in a manner to insure the
safety of persons and property in the vicinity of the work. The Installing Contractor’s personnel
shall comply with safety procedures in accordance with OSHA standards and any established
project safety plan.
11.3 The Owner shall request marking of underground utilities by an underground utility location
service as required by law, and the Installing Contractor shall avoid contact with all marked
underground facilities.
11.4 The portion of the construction site occupied by the Installing Contractor, including equipment
and material stockpiles shall be kept reasonably clean and orderly.
11.5 Installation of helical piles may be observed by representatives of the Owner for quality assurance
purposes. The Installing Contractor shall give the Owner at least 24 hours’ notice prior to the
pile installation operations.
11.6 The helical pile installation technique shall be such that it is consistent with the geotechnical,
logistical, environmental, and load carrying conditions of the project. The lead section shall be
positioned at the appropriate site survey stake location as determined from the plan drawings.
11.7 The helical pile sections shall be advanced into the soil in a continuous manner at a rate of
rotation less than 25 revolutions per minute (rpm). Sufficient crowd shall be applied to advance
the helical pile sections at a rate approximately equal to the pitch of the helix plate per revolution.
The rate of rotation and magnitude of down pressure shall be adjusted for different soil conditions
and depths. Extension sections shall be provided to obtain the required minimum overall length
and minimum torsional resistance as shown on the project Plans.
12
TERMINATION CRITERIA
12.1 The minimum final torsional resistance and/or any required pile length and embedment depth
criteria, as specified in the Pre-Construction Submittals, must be satisfied prior to terminating
the pile installation. In the event any helical pile fails to meet these production quality control
termination criteria, the following remedies may be suitable if authorized by the Owner:
12.1.1 If the installation fails to meet the minimum torsional resistance criterion at the minimum
embedment length:
12.1.1.1 Continue the installation to greater depths until the torsional resistance criterion
is met, provided that, if a maximum length constraint is applicable, continued
installation does not exceed said maximum length constraint, or
