... of door leaf, load-bearing column, hinge, top track system, bottom track system, driving system, transmission, sealing system and automatic ... wire, safety parameter between 6 and 10;5. Top track is steel frame composite structure;6. Electrical component can ... 24m/s;9. Electrical cabinet protection grade reaches IP55 Prefabricated House Door ApplicationFolding doors, with foldable door leaves, make ...