This paper describes a new construction method by which the top floor is erected first, then the other floors while pushing up the top floor by the height of the new floor one by one with oil jacks, to construct a building. This working method was tentatively applied in 1990, and satisfactory results were obtained. So, further improvements were made to the construction method and facility, and were applied in 1994. This paper first introduces the concept and working procedure of this process and then its application to a multi-story office building.
