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.

► Collapse of two arch halls, made out of corrugated steel plate, is presented.
► Halls have the form of an arch, span 24 m and height 8.1 m.
► 1 mm thick plate, cold formed into ABM panel, height 110 mm, is the main bearing element.
► The slenderness of the arch is 318.
► Snow load is detected as the main cause of the collapse.