Patent ID: 8434275
Filing Date: 2013-05-07
Classification: E04F

Abstract:
1. A double floor structure comprising: a plurality of support legs to be placed on a lower floor; and a plurality of beams which are arranged in a plurality of rows and constitute an upper floor; wherein each of the support legs includes an upper member supporting the plurality of beams from a lower side, a lower member arranged below the upper member, and an intermediate member arranged between the upper member and the lower member, and each of the upper member, the intermediate member, and the lower member is formed of a metal extruded shape, and is to be positioned in such a manner that an extrusion direction coincides with a vertical direction, the upper member including a bottom surface that faces the lower member and a top surface that is opposite the bottom surface, the upper member defining a hollow with an inner diameter that extends from the bottom surface to the top surface so as to receive the intermediate member.