What We make Helical Piles Domestic and Commercial Helical Piles ranging from 7.5T to 100T SWL capacity. Extensions Domestic and Commercial Pile Extensions with Slip or Flanged Connection options. Custom Top Plates Custom Top Connection Plates made to your project specifications, compatible with AA Steel Works adjustable slip on sleeve allowing a zero onsite welding connection. Underpinning Brackets Engineered, Cost Effective Underpinning solutions using Helical Pile Technology