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Examples are provided where collapses of HDPE pipes suggest that contractors may not be the only liable party. Some clients and designers are also failing to understand the risks and can be also liable if they do not specify and monitor sufficiently robust solutions.A copy can be downloaded from 

Describes why the correct structural classification of different pipe materials and designs is essential to ensure that the appropriate design method is used.  Only by establishing if a pipe is “rigid”, “semi-rigid” or “flexible” can the performance of the pipeline be reliably anticipated, when properly installed using suitable embedment. It also explains the importance of comprehensive and rigorous in-situ testing on new material combinations and product designs to ensure that...

This new case study publication offers information on a recent stormwater detention project at Akron-Canton Airport, Ohio, USA, where contractors and designers decided to change their specification and opt for concrete pipes as preferred material over HDPE in order to save on size and design requirements and occupy a smaller footprint for the installation.The use of concrete pipes helped save considerable time, money and resource. A copy of the Case Study can be downloaded from