This method is good for limited site access and limited headroom. For works, we will use rigs ranging from a 2-Ton, door entrance drivable rig which can drill piles from 150mm up to 300mm in diameter maximum depth 15m, up to a 15-Ton piling rig which can drill from 300mm diameter up to 450mm in diameter down to 20m. Augers came on 1m -1.5m section and are installed manually metre by metre down. This solution will work for clay or chalk grounds, the borehole needs to stay formed and open with no water strikes and gravels. This method is vibration free.