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© 2014 Foundation Supportworks
®
,
Inc.
All Rights Reserved
p 175
APPENDIX 2F
MODEL SPECIFICATIONS
Chapter 2
Helical Foundation Systems
3.1.26 Service Loads: See “Nominal Loads” above.
3.1.27 Ultimate Soil Nail Capacity: The helical soil nail capacity based on the least capacity
determined from applicable ultimate limit states for mechanical and geotechnical
capacity.
4
APPROVED HELICAL SOIL NAIL MANUFACTURERS
4.1 Foundation Supportworks
®
, Inc., 12330 Cary Circle, Omaha, NE 68128; Phone: (800) 281-8545;
Fax: (402) 393-4002.
4.2 Due to the special requirements for design and manufacturing of helical soil nails, the soil nails
shall be obtained from Foundation Supportworks
®
, Inc., or other qualified manufacturer with an
approved equivalent product. A request to substitute any other manufactured helical product
must be submitted to the Owner for review not less than seven (7) calendar days prior to the bid
date. The request must include:
4.2.1 Documentation of at least five years of production experience manufacturing helical soil
nails,
4.2.2 Documentation that the manufacturer’s helical soil nails have been used successfully in
at least three 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
5.1 Solid Square Shaft Helical Soil Nail Models HS150 and HS175 manufactured in accordance with
the requirements of Sections 5 and 6 of this specification.
5.1.1 Helix plates shall meet the following geometry and spacing criteria to minimize soil
disturbance:
5.1.1.1 True helix-shaped plates that are normal to the shaft such that the leading and
trailing edges are within
¼
inch of parallel.
5.1.1.2 Helix pitch is 3 inches ±
¼
inch.
5.1.1.3 All helix plates have the same pitch.
5.1.1.4 Helix plates have generally circular edge geometry.
5.1.1.5 Helix spacing along the shaft shall be between 2.4 and 3.6 times the helix
diameter.
5.1.1.6 Helix plates are arranged along the shaft such that they all theoretically track
the proceeding plate.
5.2 Wall Reinforcement, Anchorage, Bearing Plates, Nuts and Washers.