Technical Manual

Inc.

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.

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.

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