The engineer is responsible for the design of any engineering aspects of theproject that require rational assessment or design. Typically these are aspects that are not covered by the “deemed-to-satisfy” provisions of the Building Regulations. These could include investigation of site conditions, selection ofappropriate types of construction and the specification of materials, design ofstructural elements (foundations, beams, suspended slabs, high boundary and/orretaining walls, etc.) or services (ventilation, water, electrical, mechanical, fire andother installations) . The engineer should inspect the work for which he assumesresponsibility and certify that the design has been correctly implemented.