• Dutco Tennant LLC, PO Box 233, Dubai, U.A.E.
Fortress Civil Infrastructure
Fortress Roads & Utilities

STAKKAbox™ Fortress is a range of modular and structural preformed access chambers, suitable for use in carriageway and footway environments.

The Fortress system is molded in HDPE and possesses excellent strength to weight properties.

Supplied in 150mm deep twinwall rings, the system provides contractors with a means of constructing access chambers quickly and inexpensively, whilst offering improved build quality, reduced defects and enhanced site safety performance.

Built by stacking sections to required depth, each part weighs under 25kg, making it suitable for a single person to lift under manual handling guidelines.


  • Fast and Easy to Install
  • Sectional & Twin Wall Design
  • Flexible During Installation
  • Smooth Outer Walls with Lip to ‘Key In’
  • Flat Pack Option