ADS StormTech News

February 2022

Design flexibility is at the heart of optimised performance

When designing a stormwater attenuation system, it's important to consider not only the hydraulic requirements, but the site conditions, the construction process, the necessity for maintenance, the environmental concerns and the technical, legal and client constraints

The flexibility of the system is thus central to the solution - can the design be optimised to meet the relevant conditions and controls? One of the most important benefits of ADS StormTech - the worlds preferred stormwater attenuation system - is its adaptability, meaning engineers can produce the most effective design, whatever the circumstances.

This is particularly true when minimising the construction depth of the attenuation system. This largely depends on two factors: minimum cover depth and the height of the stormwater storage system. Shallow systems may help avoid contact with high groundwater, and lower dig depth can reduce dewatering costs and installation delays in saturated ground. Shallow systems can also minimise the cost of excavation, muck-away and embedment/backfill, including fewer transport movements to and from the site. Reducing the depth may also enable the invert depth of the entire upstream drainage system to be raised, resulting in additional cost savings.


StormTech SC310, SC740 and MC3500 chambers have 450mm min cover depth under HGV traffic loads. Pipes and crates normally need c600mm - 800mm min cover depth.

For crates, if the depth of cover available is less than the minimum recommended by the manufacturer, a protective concrete slab is frequently placed above the crate system. This is expensive and time-consuming to construct and makes it impossible to access the system from above after installation.

Find Out More


ADS StormTech is available in a wide range of chamber sizes, which means that it has enormous flexibility to meet the required attenuation volume and flow rates, the constraints of the site, the installation footprint and depth, and the position of inlets and outlets. Layouts can be adapted to suit local conditions, even going beyond the published construction guidelines. For example, deep installations or poor soil strength may be accommodated by altering the spacing between the chambers, the depth of the foundation material and the degree of compaction of the embedment stone.

Find Out More


StormTech meets in full the requirements of ASTM F2787, ASTM2418 and ASTM F2922 and Section 12.12 of the AASHTO LRFD Bridge Design Specifications safety factors for live and permanent earth loads. These Standards provide the basis of product quality and of safe structural design. Further assurance is provided in the UK through rigorous independent testing and assessment within the scope of BBA certification.

Find Out More



StormTech's unique design means you can stop and start chamber runs whilst maintaining uninterrupted flow through the system and providing the required storage volume. This means it can be configured around obstacles such as lighting columns and makes it easy to optimise systems for all conditions.

The hydraulic performance of the system can be easily matched to the design requirements and optimised through the StormTech Design Tool. This is free to use and provides quick and effective system design. It can be integrated with CAD and other design, engineering and specification documents.

Find Out More
Find Out More


StormTech is manufactured by ADS, America's largest manufacturer of corrugated thermoplastic drainage pipes and a specialist in water management systems. StormTech has a long and successful track record with over 40,000 system installations using in excess of 2.5m units.

To book a CPD seminar or to contact ADS UK call 0203 442 0607 or click here