Project Description


Johnny McCollum – Northern Ireland

028 7954 9045

Trevor Beddow – Great Britain

01530 240000

Michael Hassan – Republic Of Ireland

07809 553040

Gary Donnelly – Scotland

07989 348045

The DN4000 chamber ring is supplied with standard tongue and groove joint, connecting bolts and butyl rubber sealant for jointing purposes. The units are designed for use with the FP McCann ladder system.


  • Water Treatment plants
  • Stormwater Attenuation Systems
  • Storage Tanks
  • Catchpit

Single units (half ring) are lifted using 3 no. threaded lifting loops connected into threaded lifting sockets, that are cast into the units, all of which must be used. Assembled units (full ring) are then lifted using 4 threaded lifting loops.

The 4 metre chamber section comes as a two-part unit, which allows for ease of transport and handling.


Heavy-duty cover slabs are manufactured in two sections, supplied with standard openings. Standard cover slabs are designed to withstand 30 units of Type HB loading, applied in accordance with BS 5911. If required, cover slabs can be designed to withstand 45 units of Type HB loading. For special opening cover slabs, an engineering drawing and steel specification may be required in order to achieve the desired loading requirement.