Collapse of halls made from cold-formed steel sheets

Paper describes a bearing structure shaped as a cylindrical shell, designed from cold-formed 1 mm thick steel sheets, according to so called ABM system. The transversal shaping (folding) and longitudinal forming (a circular arch) of ABM profile is executed in situ. The structure is offered for halls with spans reaching even 25 m. The work presents analysis of safety of two such objects whose execution was stopped and two other in Gdansk (Poland) and Tuszyn (Poland) that have collapsed.