a floor section assembly having a post anchor built into one of the floor panels for use with portable sectionalized flooring suitable for a volleyball court or the like is disclosed . the post anchor includes a base assembly attached to the undersurface of one of the panels and is coupled to a plurality of adjacent panels by tubes attached to the undersurface of the panels and coupled together by a rigid member extending through aligned tubes . this structure provides a broad base of support for the post carrying a volleyball net which can absorb moments placed on the post without the need for connecting the post to the base on which the flooring is assembled .