Analysis of longitudinal skylights structure made of rectangular tubes in industrial hall

Based on the example of an existing industrial hall, an analysis of the behaviour of longitudinal skylights made of rectangular tubes with different types of beam-to-column bolted erection joints has been performed. The following types joints of tubular members has been investigated: existing according to execution design, recommended and implemented during its overhaul. The analysis has been undertaken due to the faulty design of an industrial hall's longitudinal skylights made of rectangular tubes which caused cracking of skylight wired glass panes. The static behaviour of the skylights as space structures interacting with the roof structure was subjected to analysis. Also the behaviour of the joints between the tubular members of the faulty and correct (recommended) skylight structures, and that of the hall's joints after their stiffening were analysed. Finally, conclusions and recommendations concerning the repair and proper design of skylights of this type, with a special focus on skylight joints, are presented.