Traditionally, Abnormal Load Applications to Local Authorities in Ireland were for loads below 180 tonnes, and usually below 150 tonnes. In recent years, energy sector requirements mean requests for the movement of exceptionally heavy abnormal loads have increased significantly, and are expected to continue. Numerous loads programmed to be moved over the coming years are far in excess of 180 tonnes, with some large generators identified by the energy sector as up to 570 tonnes.
This puts significant pressure on Ireland’s road and bridge infrastructure. Modern bridge structures have been designed to accommodate loading of 180 tonnes; numerous ‘legacy’ bridges have a design loading significantly lower than 180 tonnes. Consequently, additional structural assessment requirements apply to heavy loads and particularly loads over 180 tonnes to help protect road assets and the safety of road users.
Despite large loads such as transformers being ordered 2-3 years before delivery, developers and promoters, have to date, little or no early engagement in advance consultation with stakeholders and have submitted late requests to transport these exceptional loads. Some exceptional loads are being ordered with no consideration for route selection and no guarantee they can be delivered to their destinations. This is currently causing unnecessary project delay and risk.
As a result, Department of Transport Circular RW18/2024 was issued to clarify this assessment process, which is needed both to protect state infrastructure and to assist applicants in the management of exceptionally heavy abnormal loads. The circular sets out the process for compliance with structural assessment standards and provides applicants with additional clarity. The Department of Transport keeps all circulars under review and issues notifications where updates or clarifications are required.
Through stakeholder engagement with the Road Sector and Energy Sector a Local Authority Central Support Unit has been identified to coordinate delivery of its infrastructure going forward. This would include the assessment and delivery of exceptional abnormal loads with adequate dedicated expert technical resources in place to manage the process over the coming years. The Department of Climate, Energy and the Environment is currently considering resource and funding requirements for this Central Support Unit.
