page_title: Screw piles
hierarchical_section_title: Screw piles
caption_attribution_description: English: Photo of screw piles (helical anchors) staged for installation at Alameda High School.
context_page_description: Screw piles, sometimes referred to as screw anchors, screw-piles, helical piles, and helical anchors are a steel screw-in piling and ground anchoring system used for building deep foundations. Screw piles are manufactured using varying sizes of tubular hollow sections for the pile or anchors shaft.
  The pile shaft transfers a structure's load into the pile. Helical steel plates are welded to the pile shaft in accordance with the intended ground conditions. Helices can be press-formed to a specified pitch or simply consist of flat plates welded at a specified pitch to the pile's shaft. The number of helices, their diameters and position on the pile shaft as well as steel plate thickness are all determined by a combination of:
  The combined structure design load requirement
  The geotechnical parameters
  Environmental corrosion parameters
  The minimum design life of the structure being supported or restrained.
  Screw pile steel shaft sections are subjected to design parameters and building codes standards for the region of manufacture.
context_section_description: Screw piles, sometimes referred to as screw anchors, screw-piles, helical piles, and helical anchors are a steel screw-in piling and ground anchoring system used for building deep foundations.  Screw piles are manufactured using varying sizes of tubular hollow sections for the pile or anchors shaft.
  The pile shaft transfers a structure's load into the pile.  Helical steel plates are welded to the pile shaft in accordance with the intended ground conditions.  Helices can be press-formed to a specified pitch or simply consist of flat plates welded at a specified pitch to the pile's shaft. The number of helices, their diameters and position on the pile shaft as well as steel plate thickness are all determined by a combination of:
  The combined structure design load requirement
  The geotechnical parameters
  Environmental corrosion parameters
  The minimum design life of the structure being supported or restrained.
  Screw pile steel shaft sections are subjected to design parameters and building codes standards for the region of manufacture.
  The helices are majorly in the round in shape, can be prepared using metals or concrete, the helices that welded over the steel shaft are also called flights or Helical Flights, helical flights can be of varying sizes depending upon the requirement of surface.
  These helical flights are joined/welded through various technologies , one such technology is called inertia welding , strongest joints are made through inertia welding technology  for helical piles , which allows it to bear maximum possible load for any types of foundation.
  There are only a few differences between helical anchors, helical piles and helical piers but the terms are often used interchangeably. 
  Helical Anchors are an extendable method of a steel shaft wielded with helical bearing plates. Plies/Piers both refer to profound base elements that withstand or transfer vertical/horizontal loads. Anchors are piles utilized only in uplift/tension software like restraining wall tiebacks or vertical ground anchors made to resist overturning forces
  Remember Tension forces are those that pull materials apart and Compression is the one that squeezes material together Piles are usually Composed of steel, wood, etc, can be small in diameter and also does not use concrete in their construction Piers are made up of concrete just and can be made in large diameter.
  Helical anchors are employed in tension/uplift applications, can be set up vertically or horizontally. Horizontally, they frequently put behind retaining walls and called tiebacks, Vertically, they are known as anchor piles, base anchors, ground anchors, ground anchors or soil anchors
caption: Helical anchors.
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