Prefabricated modular buildings, of metal or primarily of metal, for aircraft vertical take-off and landing operations; vertiports, of metal or primarily of metal; vertiport structures, of metal or primarily of metal, for take off and landing of aircrafts; vertiport structures, of metal or primarily of metal, for airflow regulation, noise reduction and fire suppression during take off and landing of an aircraft; structures of metal, or primarily of metal, for aircraft vertical take-off and la...