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Large Network Access Chambers

Being the only scalable network access chamber system for underground utilities access, the offers a truly modular solution that can be constructed to the specification of large chambers and varying site requirements by a range of connectable components and accessories.

It's truly unique adjustability to customers' requirements regarding size, lead time, and installation environments makes it the ideal solution for a range of installations and sites with restricted access and a need for speedy installation. Available with a wide range of cover options to meet the loading and size needs of your site, STAKKAbox™ offers the ideal solution.

What is a STAKKAbox™ ULTIMA Connect Access Chamber?

Used globally within a range of sectors, environments and weather conditions, the STAKKAbox™ ULTIMA Connect access chamber offer a lightweight, structural, and scalable solution for the access and management of underground cables and utilities networks.

Available in any size, they are easily installed on-site, either built in-situ or delivered pre-built. Stackable in 150mm sections, STAKKAbox™ UTLIMA Connect access chambers can be built to the desired depth and extended by simply adding more components. Designed to be adaptable onsite, the STAKKAbox™ ULTIMA Connect range range offers an added level of flexibility that cannot be achieved via traditional methods such as brick and concrete. With their ability to be drilled and cut for duct entries, overbuilding or benching is easily achieved around existing or new utilities with hand power tools.

Using STAKKAbox™ extensive range of accessories can save installers even more time, with a range of compatible steps, cable management, MULTIduct™ spigots, duct entries and chamber bases available.

Completing the access and security of underground utilities Cubis’ range of access covers seamlessly integrates with the STAKKAbox™ range which has been designed to meet any size and load rating requirements from A15 to F900 under EN124 standards.

Why Choose STAKKAbox™ ULTIMA Connect?


Suitable for meeting and exceeding installation environments rated to F900 under EN124. Ideal for areas imposing high wheel loads, e.g. docks, aircraft pavements.

Flat Pack Delivery

STAKKAbox™ ULTIMA Connect can be shipped flat pack in component format. Reducing lead times, the number of vehicles required, and the need for specialist lifting equipment.

No Limit on Size

The STAKKAbox™ ULTIMA Connect chamber system is the only solution that can be built to any size required*. A range of cover options is available from A15 to F900 loadings. *This depends on site and application suitability. Please speak to a member of our team for further details.

Fast Reinstatement and Easy to Install

Comprised of lightweight components, ULTIMA Connect ensures safer manual handling and speed of installation. Once the chamber is built, full installation can be completed, vastly reducing installation times compared to traditional methods of equipment or plant installation.

Frame Options

With a wide range of frame options to suit varying installation environments, Cubis’ frames offer greater flexibility for varying ground conditions, with adjustability in height and camber to meet the surrounding ground level. Bolt-in frames and sub-security options offer protection for networks against damage or theft.

No Limit on Size

Our range of access covers enables clients to build to any size required*. With different cover options available, including composite, concrete, ductile, and recessed. *This depends on site and application suitability. Please speak to a member of our team for further details.

Load Rating

Suitable for meeting and exceeding installation environments rated from A15 to F900 under EN124. Our range of access covers is ideal for areas imposing high wheel loads, e.g., docks, aircraft, roads, and pavements.

Clear Opening and Safe Access

Our range of access covers provides greater access to underground utilities with easy-to-remove covers and cross-beams, making a much larger clear opening space for safe access for operatives, both during and after installation. STAKKAbox™ access chamber range for ease of installation.

Large Access Covers

Large Access Covers

Cubis’ access covers provide a complete underground network access system. Designed for varying installation environments, our range of cover options can meet any size and load rating requirements to complete the underground network access system needed for your project.

Developed from a range of materials to optimise and deliver the technical needs across a range of applications and utilities, seamlessly integrating with the STAKKAbox™ UTLIMA Connect access chamber system, accessories, and cable protection products, Cubis’ system approach provides a full utilities network offering to its customers.

How STAKKAbox™ ULTIMA Connect Can be Utilised to Offer Greater Sustainable Solutions to Your Project

How STAKKAbox™ ULTIMA Connect Can be Utilised to Offer Greater Sustainable Solutions to Your Project

The use of modern materials to manufacture recyclable, lightweight, adjustable, and space-saving products such as STAKKAbox™ ULTIMA Connect offers greater sustainable solutions for accessing utilities within a range of sectors and environments. Minimising the need for heavy lifting equipment during installation and maximizing shipping capacity through its component parts, with the aim of reducing the number of vehicles, offers a way to avoid excess carbon emissions. This is also enhanced by the range of benefits the ULTIMA Connect provides, such as reduced excavation and the need for imported materials when installing large chambers due to their structural properties that allow for dug material for backfill and greater adjustability with in-situ duct entries being quickly and safely formed on site with hand power tools.

As a business, we are dedicated to working responsibly, and our drive to manufacture and deliver sustainable products and solutions to our customers is at the forefront of business. Our product range has been externally verified by The International EPD® System. To provide an Environmental Product Declaration (EDP) that summaries the environment impact of the product throughout their Life Cycle Assessment (LCA).

Digitalisation of Access Chamber Systems

Digitalisation of Access Chamber Systems

Our digital technical library (BIM) provides an advanced service that enables customers to explore, customise and familiarise themselves with the wide range of STAKKAbox™ ULTIMA Connect chamber sizes we offer. The BIM library has been developed to help designers quickly and seamlessly configure products, tailoring them to meet the exact needs of their projects. Creating greater accuracy at an early design stage means that potential errors or risks can be avoided and the most energy-efficient measures can be implemented throughout the project lifecycle; this helps to minimise negative environmental impact and eliminate waste.

If you can’t find the size you require, don’t hesitate to reach out to one of our team members today.

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