Reducing heat loss through thermal bridges in LSTS by optimizing frame design

Light steel thin-walled structures are increasingly used in modern construction due to their key advantages, such as fast assembly and reduced costs resulting from the lightweight nature of the elements. However, a continuous steel frame leads to the formation of numerous thermal bridges, which reduce the overall thermal resistance of the structure. This study investigates the influence of design solutions on heat loss through frame fragments. Two frame configurations are analyzed, differing primarily in stud spacing and the method of floor-to-wall connection. The structural analysis was carried out using SCAD software, while heat loss was assessed by 3D temperature field modeling in ELCUT. The results show that, with comparable steel consumption, the optimized frame reduces the effect of thermal bridging and significantly lowers the required insulation thickness. Key findings indicate that increasing stud spacing and modifying the force transfer method in LSTS can considerably improve the thermal performance of the building. This work highlights the importance of optimizing structural solutions to enhance the energy efficiency of LSTS buildings.