Rotary Auger Bored Piling are constructed with a short solid stemmed auger attached to a telescopic Kelly bar, once the design depth has been reached the Kelly bar / auger is removed from the bore and the pile reinforcement is placed ready for concreting, once concrete has been introduced the pile is completed. Where unstable ground or ground water is encountered this piling system can install temporary / permanent lining tubes to allow sufficient support for the pile bore during the concreting process.