The article discusses the key problems of resource and damageability of crane beams over a long period of operation. A classification of the most dangerous defects in crane beams is proposed, taking into account not only the location of the defect, but also the mechanism of its development, as well as possible causes of its occurrence. The focus is on the effect of periodic loading on the initiation and growth of fatigue cracks. The article analyzes international research in order to identify methods and methodologies used to ensure the safety and reliable operation of the objects under study. It is shown that special attention should be paid to periodic examination for the purpose of early detection of cracks of various etiologies and timely adoption of the necessary measures. It has been revealed that the most effective approach to ensuring reliable and safe operation of the object under study throughout its life cycle is the collaboration of modern calculation methods, including fracture mechanics, and experimental techniques during periodic inspections, which will allow the crane beam zones to be ranked according to the likelihood of a defect occurring and reduce risk of sudden brittle failure.

Keywords: crane beam, crack, brittle fracture, fracture mechanics, shear deformation, normal separation, finite element method, ranking by fracture risk, maintenance, stress-strain state