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APPENDIX 2F
MODEL SPECIFICATIONS
Chapter 2
Helical Foundation Systems
4.2.1 Documentation of at least five years of production experience manufacturing helical
anchors,
4.2.2 Documentation that the manufacturer’s helical anchors have been used successfully in
at least five engineered construction projects within the last three years,
4.2.3 Product acceptance by the local building code official(s) having jurisdiction over the
project, and/or
4.2.4 Current ICC-ES product evaluation report or complete description of product testing
and manufacturing quality assurance programs used to assess and maintain product
quality and determine product mechanical strength and geotechnical capacity.
5
ACCEPTABLE PRODUCTS FOR TENSION ONLY APPLICATIONS
5.1 Solid Square Shaft Helical Anchor Models HA150 and HA175 manufactured in accordance with
the requirements of Sections 5 and 7 of this specification.
5.1.1 Solid round corner square shaft helical anchors may be used for tension only applications.
5.1.2 Helix plates shall meet the following geometry and spacing criteria to minimize soil
disturbance:
5.1.2.1 True helix-shaped plates that are normal to the shaft such that the leading and
trailing edges are within
¼
inch of parallel.
5.1.2.2 Helix pitch is 3 inches ±
¼
inch.
5.1.2.3 All helix plates have the same pitch.
5.1.2.4 Helix plates have generally circular edge geometry.
5.1.2.5 Helix spacing along the shaft shall be between 2.4 and 3.6 times the helix
diameter.
5.1.2.6 Helix plates are arranged along the shaft such that they all theoretically track
the same path as the proceeding plate.
6
ACCEPTABLE PRODUCTS FOR COMBINED COMPRESSION AND
TENSION APPLICATIONS
6.1 Hollow Round Shaft Helical Pile/Anchor Models HP237, HP287, HP288, HP350, HP450, HP662
and HP700 manufactured in accordance with the requirements of Sections 6 and 7 of this
specification.
6.1.1 Hollow round shaft helical piles/anchors shall be used in applications of alternating
compression and tension loads. During compression loading, round shaft helical piles/
anchors are generally more resistant to bending or buckling over solid square shaft
counterparts due to superior cross-sectional properties and coupling details.
6.1.2 During compression loading, pile/anchor shaft sections shall be in full, direct contact
within couplings so as to remove coupling bolts and coupling welds from the “in-service”
axial load path.