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APPENDIX 2F
MODEL SPECIFICATIONS
Chapter 2
Helical Foundation Systems
7.6.5 Brackets: New construction bracket HP450NCB8 shall be used for both tension and
compression applications with the HP450 shaft. Bracket finishes are either plain steel or
hot-dip galvanized in accordance with ASTM A123. Bracket hardware finishes are zinc
coated in accordance with ASTM B633.
7.7 Model HP662 Helical Pile/Anchor System
7.7.1 This section is for general information purposes only. Larger diameter product lines,
such as Model HP662, are typically customized on a project specific basis.
7.7.1.1 Central Steel Shaft: The central steel shaft of the lead and extension sections
are 6.625-inch outer diameter by 0.280-inch nominal wall thickness, hollow
structural section in conformance with ASTM A500 Grade B or C with a minimum
yield strength of 60 ksi and a minimum tensile strength of 70 ksi. The shaft finish
is either plain steel or hot-dip galvanized in accordance with ASTM A123.
7.7.1.2 Shaft Coupling Material: The shaft coupling material consists of 6.000-inch
outer diameter by 0.375-inch nominal wall thickness, hollow structural section
in conformance with ASTM A513 Type 5, Grade 1026 with a minimum yield
strength of 70 ksi and a minimum tensile strength of 80 ksi. The shaft coupling
finish is either plain steel or hot-dip galvanized in accordance with ASTM A123.
7.7.1.3 Helix Plate Material: The helix plates are factory welded to the lead or extension
shaft sections. Helix plates with outer diameters of 10, 12 or 14 inches are either
0.375 or 0.500-inch thick; 16-inch diameter helices are 0.500-inch thick. Helix
plates are manufactured with ASTM A572 Grade 50 steel with a minimum yield
strength of 50 ksi and a minimum tensile strength of 65 ksi. The helix plate finish
is either plain steel or hot-dip galvanized in accordance with ASTM A123.
7.7.1.4 Shaft Coupling Hardware: The lead and extension shaft sections are coupled
with four (4) bolts and nuts per coupled shaft section. The coupling hardware
consists of 1.750-inch standard hex bolts conforming to SAE J429 Grade 5
and standard hex nuts. The bolts and nuts are zinc coated in accordance with
ASTM B633.
7.8 Model HP700 Helical Pile/Anchor System
7.8.1 This section is for general information purposes only. Larger diameter product lines,
such as Model HP700, are typically customized on a project specific basis.
7.8.1.1 Central Steel Shaft: The central steel shaft of the lead and extension sections
are 7.000-inch outer diameter by 0.362-inch nominal wall thickness, hollow
structural section in conformance with ASTM A252 Grade 3 with a minimum
yield strength of 60 ksi and a minimum tensile strength of 70 ksi. The shaft
finish is either plain steel or hot-dip galvanized in accordance with ASTM A123.
7.8.1.2 Shaft Coupling Material: The shaft coupling material consists of 7.750-inch
outer diameter by 0.313-inch nominal wall thickness, hollow structural section
in conformance with ASTM A513 Type 5, Grade 1026 with a minimum yield
strength of 70 ksi and a minimum tensile strength of 80 ksi. The shaft coupling
finish is either plain steel or hot-dip galvanized in accordance with ASTM A123.
