The complexity of the installation work for absorber pile installations has certain implications for the tender specifications and for the contractor to be selected for a given project. For reasons of responsibility and warranty, systems of this type should always be awarded to one contractor. The ideal interface is the manifold/header installed ready for operation. It should be contractually agreed that the building contractor is responsible for ensuring cooperation on site during the installation and for safeguarding the installation during interruptions due to construction progress. The installations must either be part of the contract or the contractor must be held entirely liable in the contract, while adverse conditions, items to be supplied and hindrances to work operations must be stated in the specifications so that these can be provided for. The local site management must also be held responsible. On no account can the design engineer accept the responsibility for and guarantee the proper functioning of the installation. In order to ensure that the systems are given due consideration during the planning and construction phases and guarantee 100% operational soundness, it is vital that both consultants and contractors give them a proper level of priority. For further information (PDF file) on execution, please click here * ). * ) To view PDF files you will need the Adobe Acrobat Reader. If you do not have this software, you can download the Acrobat Reader here free of charge.