Upper board and raised access floors system with the same

Improve the strength and provides a raised floor system comprising a top plate and a top plate having a reduced thickness. Access floor system according to an embodiment of the present invention includes a top plate having an upper plate and a lower plate which face each other's place. It said upper plate and is there disposed reinforcing ribs which form an open area between the lower plate, an empty space, the honeycomb is disposed. The top of this structure is supported by the support plate, the support plate is provided to enable height adjustment by the leveling bolt is installed on the support of rubber. Tops, reinforcements, honeycomb, strength