Polypipe CGU worked with Met Consulting Engineers on the project, which involved undertaking structural calculation drawings which were submitted to Yorkshire Water for approval. By analysing the site’s ground conditions, the experts at Polypipe CGU were able to value engineer the pipe to a stiffness classification of 3.0kN/m². Ensuring the most appropriate stiffness class of pipe for a specific project is one of the unique benefits of the Ridgistorm-XL system and ensures that pipes are neither over nor under engineered.
The design also required a series of bespoke fittings to complement the Ridgistorm-XL attenuation tank, including a T-junction, a 90° bend and elbows suitable for man entry. As the fittings were pre-fabricated in Polypipe CGU’s in-house fabrications department, the installation time on site was significantly reduced.
The Ridgistorm-XL pipes and fittings were also jointed using Polypipe CGU’s unique patented electro-fusion jointing process, which provides superior joint integrity. Another benefit of this welding method is that the need for operatives to work in confined spaces is vastly reduced, providing excellent on-site health and safety benefits to the contractor.
Mark Rowden, Ridgistorm-XL Project Manager, said: “This project called for a bespoke drainage solution from the start and was particularly challenging for the team. We understood, however, that with the drainage solution subject to a Section 104 Agreement, there was absolutely no room for error in the project specifications, and we’re delighted with the results.”
The attenuation tank will be used to help reduce peak flow at the housing development by spreading it over a longer period of time.