The STAKKAbox™ Fortress range of network access chamber systems is strong yet lightweight, structural, scalable, and suitable for use within multiple sector applications. The Fortress chamber system has been designed to significantly reduce the costs of network access chamber installations.
With its twinwall design and individual sections, the Fortress solution is lightweight, meaning it can be manually lifted and stacked one on top of the other to reach the specified depth required.
How it's Built
STAKKAbox™ Fortress chambers are built by combining four interlocking sidewall pieces to form a chamber ring section. These ring sections are 150mm deep and are then stacked on top of each other to reach the specified depth required. Providing contractors with a means of constructing access chambers quickly and inexpensively while offering improved build quality, reduced defects, and enhanced site safety performance. When constructing an ULTIMA Connect chamber, you must remember to start with a full ring section of either left or right corner pieces. You can then build up from this using alternative corner pieces per ring section until the specified depth of the chamber is reached.
STAKKAbox™ Fortress is manufactured in nitrogen-foamed High Density Polyethylene (HDPE), of which up to 90% is recycled material.
HDPE possesses excellent strength to weight properties, and its twinwall design gives it strength, with Fortress being extensively tested to ensure that it meets loading requirements up to D400 in a variety of installation environments.
Fortress chamber sizes have been designed to be reflective of the most commonly used access chamber sizes. Fortress chambers are constructed from standard component parts, allowing for greater flexibility during transportation and installation.Download our product size guide for chambers for more details on available sizes
Using Fortress access chambers can help to save even more time, with their adaptability to onsite conditions with standard tools to overbuild or bench existing network utilities, introduce duct entries for cable entry, and allow for top-section level adjustment.
Their range of accessories for installers to simply place, connect up tubes or ducts, backfill, and walk away makes them the ideal solution for a range of installation environments.
STAKKAbox™ Fortress is suitable for meeting installation environments rated to D400 under EN124.
Ideal for areas imposing wheel loads, such as carriageways and roads open to commercial vehicles, whilst still enabling both scalability and adaptability to varying underground utilities.