Analysis of a Crane Runway Failure

In recent years the pressure on economy of design for all civil engineering structures has been more and more increasing. In case of steel structures cost saving measures have led to reduction of their own weight and thus as well to their total stiffness. Insufficiently rigid structures are usually influenced by unfavorable effects, which some of them cannot be anticipated at the beginning of their design. In these cases less or more important failures occur. An example of such failures is a two bay industrial steel hall equipped by four runway cranes. Operation of these cranes have caused failures of load bearing joints. The object of this paper is analysis of cause of failure of this structure.