Hi there....piling was established as a requirement for the build, with the bedrock layer somewhere between 4 and 8m down. The piling plan was agreed by the OrBorTor My builder had the necessary equipment to drill the pile holes he made cages and inserted, then poured the concrete to form the pile - the piles were cast, not driven so... circular piles, dug, fabricated, placed and cast by my builder to the plan approved by the OrBorTor Engineer