STAKKAbox™ is a range of patented pre-formed Structural Access Chambers (or duct boxes) which have been designed for use in both footway and carriageway installations. The finished chambers provide access to underground ducting and / or storage equipment.

The STAKKAbox ™ Underground Chamber has a high strength to weight ratio, due to its unique patented twin wall design with internal vertical and horizontal support ribs. Each Underground Chamber consists of 155mm deep ring sections which are stacked on top of each other to form chambers of varying depths. Each ring section is castellated to positively interlock with the unit above and below. A wide range of section sizes are available with duct entry holes and solid wall sections. All STAKKAbox™ sections fall below the recognised one man weight lifting limit.