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STAKKAbox™ Modula

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

The Modula system is moulded in PP and possesses excellent strength to weight properties.

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Features & Benefits

Fast and Easy to Install

STAKKAbox™ chambers are significantly faster to install than conventional alternatives, with complete installations typically taking up to one hour. This results in reduced costs for the installer. No specialist equipment or plant is required in order to install the chamber and there is no need for specialist box builders.

Sectional & Twin Wall Design

Chambers are built to required depth by adding 150mm sections. Due to the twinwall design, individual sections are light meaning they can be manually lifted. Each access chamber possesses vertical and horizontal ribs,  resulting in a product that is strong vertically and on the sidewall. Most installations do not require specialist backfills, reducing installation costs.

Flexible During Installation

Chambers can be adapted to suit on-site conditions with standard tools to overbuild over existing networks, Introduce duct entries for cable entry and for top-section fine adjustment.

Smooth Outer Walls with Lip to ‘Key In’

Gaps in the outer wall will negatively impact the effectiveness of compaction around the chamber. STAKKAbox™ chambers have smooth outer walls and an outer lip which keys into the backfill.

Manufactured from Recycled Material

Specifying STAKKAbox™ Modula helps end users reach sustainability targets due to the material being largely composed of high-grade recycled material. In addition, Modula is completely recyclable at the end of its life.

Variability in Size

STAKKAbox™ Modula can be used to create a large number of sizes due to its component design. This provides access chambers with clear opening from 150 x 150 up to 1200 x 1200.

Flat Pack Option

Modula can be supplied in 'flat pack' format to make shipping more efficient.



The STAKKAbox™ Modula system is moulded in talc-filled recycled Polypropylene (PP) which possesses excellent strength to weight properties. Each section is ribbed internally to improve loading performance.


Available Sizes

Information on sizing

STAKKAbox™ Modula can be used to create a large number of sizes due to its component design. This provides access chambers with clear opening from 150 x 150 up to 1200 x 1200. Ring sections are built by combining corners (which provide 75mm or 150mm to the sidewall length) and sidewall pieces. Sidewall pieces measure 100mm, 150mm, 300mm, 375mm, 450mm and 600mm.

Download our product size guide for chambers in order to gain more information on available sizes.


Load Rating

STAKKAbox™ Modula is suitable for installation in environments rated to B125 under EN124.


Pre-drilled for Ease of Connection

Easily knocked out duct caps on all 4 sides of each Modula ring section allow for quick installation at different depths and remove the need for power tools de-skilling the installation for the contractor.


Options & Accessories

STAKKAbox™ Modula can be supplied with the following accessories: