Model 350 Helical Pile System

Technical Specifications

  • Outside Diameter (O.D.) = 3.5″
  • Wall Thickness = 0.313″
  • Pile Shaft Yield Strength = 60 ksi (min.)
  • Coupling Hardware: (4) 1″ Grade 8 Bolts with Nuts
  • Available Helix Blade Diameters = 8″, 10″, 12″, and 14″
  • Helix Blade Thickness = 0.375″
  • New Construction Bracket: ¾” x 6″ Square A36 Plate (for allowable compression capacities up to 60.0 kips)

Bracket Specifications

  • Bracket: Weldment manufactured from 0.25″, 0.375″, and 0.50″-thick steel plate.
    Yield strength = 36 ksi (min.), tensile strength = 58 ksi (min.).
  • External Sleeve: 3.50″ OD x 0.216″ wall x 30″ long with sleeve collar welded to one end.
    Yield strength = 50 ksi (min.), tensile strength = 62 ksi (min.).
  • Bracket Cap: 5.0″ wide x 9.0″ long x 1″ thick plate with confining ring welded to one side.
    Yield strength = 50 ksi (min.), tensile strength = 65 ksi (min.).
  • All-Thread Rod: 0.75″ diameter x 16″ long, zinc plated. Grade B7, tensile strength = 125 ksi (min.).

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