The vast majority of foul sewers are 150mm diameter and are usually laid at depths between 3m and 5m deep. Often there is a foul water pumping station in the scheme to pump the waste to an appropriate outfall. These pump stations are usually the deepest construction on the development and it is not unusual for them to be up to 7m – 8m deep.
For any excavations at this depth, it is necessary to utilise a specialist earthwork support system. Field And Civil Engineering regularly install these on their customers behalf and ensure that safety is consistently made number one priority across any given project.