Abstract: A method and girder structure for attachment of ceiling-suspended equipment in operating theatres, X-ray-and examination rooms with joists and intermediate ceiling in hospitals, clinics and surgeries, a permanent load-carrying structure being attached to the ceiling of the room, a girder structure which is broad in relation to its height being attached to the joists, with its lower edge flush with the intermediate ceiling, said structure being provided with pipes and ducts for gases, fluids and exhaust in one channel and electric cables in another channel, an equipment for operating table lighting, anaesthesia, artificial ventilation, surgical distribution boards and X-ray equipment being displaceably secured to the girder structure which is also used for joint earthing of the ceiling-suspended equipment.