On optimizing the rationing of stone structures durability

Stone structures design regulatory documents were analyzed. It is shown that the current edition of SP 15.13330.2020 “Masonry and reinforced masonry structures” implicitly expresses structures durability requirements. They mainly come down to requirements for raw materials frost resistance and practically do not take into account operating conditions and methods of structures protecting. Proposals have been made to optimize SP 15.13330 by highlighting the section “Durability”, introducing a classification of masonry operating “microconditions” and a concept of secondary protection measures excepting unconditional prohibitions on materials usage only based on physical properties.