- Understanding and predicting sandwich structure behavior in fire has been of particular interest to researchers for a long time. Sandwich panel joints are playing an important role since they not only connect sandwiches to a bearing structure, but also play a key role in stabilization of the whole building. This paper presents an investigation of a sandwich panel behavior. The sandwich panel consist of two steel layers and PIR core between them and is connected to a HEA 160 flange with the help of a screw. Using ABAQUS software, this connection is modelled and deformation fields with temperature distribution area are analyzed. The modelling process includes many stages associated with each other: static, heat transfer and sequential analysis that includes both previous analyses.