The carriage with trailer carriage and transport bars is mainly used in gravitational operation in the construction industry for lifting, transporting, lowering and moving of long and heavy parts such as e.g. pressure pipes and gas pipelines, or also for transporting concrete and gravel. The transport bars also prevents the load twisting and twisting of the mainline cable is also not possible even if the lowered load is left hanging for some time. The retracted load is locked in both the carriage and in the trailer carriage, so that the load is doubly protected against falling during the run. The trailer carriages are used with our standard HY-4 and HY-7 carriages for maximum load capacities of 5 t for the HY-4 and 10 t for the HY-7. The carriages are also controlled using our radio-telephones. The system with carriages, trailer carriages and transport bars is recognised as being very reliable and the costs for service and maintenance compared to motor-driven skyline crane are very low. The transport bar is available in two different lengths, 2.5 m and 3.5 m.