Helical Plates

  • All plates are fabricated with Grade 50 steel while most everyone else uses A-36 grade for the helix plate material.
  • Plate sizes vary from 6″ to 16″ in diameter and have a thickness of 3/8″ or 1/2″ depending on job requirements.
  • The # and sizes of helical plates may be varied to match soil conditions to the required anchor capacity.
  • The normal pitch of each helix is 3 inches and to ensure that each of them develops full capacity, each succeeding plate is located above the preceding plate a distance equal to 3 times the diameter of the preceding plate.