Problematic issues in forensic structural engineering analysis of attributing work at construction sites to ongoing and heavy maintenance

 The article is dedicated to solving issues posed to forensic experts while forensic structural engineering analysis (research), to determine the belonging of repair and construction work performed at construction facility (conducted or planned) to heavy or ongoing maintenance. Solution of issues encountered by forensic experts while conducting forensic structural engineering analyses as to attributing to a particular type of work (ongoing, heavy maintenance) is relevant for the theory and practice of forensic examinations and expert researches. Legislative acts, regulatory documents and other sources of information used when carrying out this type of research and being the basis for formation of final conclusions on performed researches have been analyzed.  Discrepancies, uncertainty and complexity of data contained in these regulatory and information sources, their controversial nature, which complicates the choice of reference for these data and their use in solving expert tasks; and in particular cases it makes it impossible for forensic experts to formulate conclusions while forensic structural engineering analysis of these issues. Relying on the analysis of legislative acts, requirements for regulatory documents, as well as forensic expert practice, it has been concluded that it is needed to systematize and develop uniform methodological approaches to solve current tasks in forensic structural engineering to attribute types of repair and construction work to a specific classification.