CPM produce large circular chambers for manhole or segmental construction, manufacturing precast concrete chamber rings up to 3000mm that comply with BS EN 1917:2002 and BS 5911-3:2002, as well as 3660mm and 4000mm diameter which are not covered by the British Standard but comply with all the relevant provisions of the British Standard and Eurocodes.
To go with these CPM produce a variety of cover slabs with a standard access that complies with the British Standard as well as a variety of special accesses manufactured to customers requirements.
These can either be in a one piece cover slab or a segmental depending on the diameter and whilst they are not covered by the British Standard our qualified engineers in the technical team at are on hand to give advice with design and installation.
Visit the Marshalls CPM website for more information on Large Circular Chambers (manhole or segment construction)