CPM offer a range of reinforced precast concrete manhole units specially designed for sinking by the caisson method from 2000mm diameter to 4000mm internal diameter in varying depths
This is achieved by using a shaft sinking plate system and is made in accordance to BS EN 1917:2002 and kitemarked where relevant to BS 5911-3:2002 (2100mm-3000mm diameter).
The system has a variety of advantages including the minimal site labour costs, the speed and ease of install and the fast, clean accurate construction.
On top of this the system is designed to be suitable for weak soils, high-plasticility clays, silts, sands and gravels.
Visit the Marshalls CPM website for more information on Caisson Shaft Sinking Systems