HS4209 Inner-climbing tower crane is installed inside of the building. Without adding the standard section, this crane can climb with the rise of the building. Also it could work as a tower crane with foundation, so it could work in the beginning of the building. And don’t necessary to work when the building reach to 2 or 3 storeys, So it could work at the whole-circle work range, low cost, complete safety device , good appearance and applicability, it can not only satisfy general civil constructions in small-medium cities, but also can satisfy high-rise buildings in large-medium cities.