Mutares-backed Donges Group, a construction engineering company completed the acquisition of Building Services unit of Ruukki, a supplier of metal-based components to construction and engineering industries. Financial terms were not disclosed. “Our strategy is to pursue profitable growth in our product businesses Residential Roofing and Building Components. We’re pleased to have found a new owner who is better positioned to develop Building Systems, which is of a project-type of business,” Sami Eronen, Ruukki President.