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In a modular wall and floor structure, the edges of wall panels have upwardly directed hooks projecting outwardly from their opposite vertical edges. Short lengths of multisided hollow extrusion have a downwardly opening longitudinal slot in each side which slots receive the panel hooks of adjacent

In a modular wall and floor structure, the edges of wall panels have upwardly directed hooks projecting outwardly from their opposite vertical edges. Short lengths of multisided hollow extrusion have a downwardly opening longitudinal slot in each side which slots receive the panel hooks of adjacent panels for connecting such panels to form an exhibit array. Adjacent ends of overhead beams are connected to each other and to the upper ends of the panels by downwardly directed beam hooks received in upper longitudinal slots in the lengths of extrusion. The lower portions of the connected or unconnected panels can be clamped between modular floor components.

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A modular floor system comprising a plurality of floor components each of which includes a base of equilateral triangle shape and a sheet material top of substantially the same shape supported by said base with the edges of said top substantially coplanar with the sides of said base, spacers secured

A modular floor system comprising a plurality of floor components each of which includes a base of equilateral triangle shape and a sheet material top of substantially the same shape supported by said base with the edges of said top substantially coplanar with the sides of said base, spacers secured to said floor components for maintaining each of said components with at least one of its sides spaced from, parallel to and in alignment with a side of another of said components, each of said spacers being of a height at least as great as the combined heights of an adjacent floor component base and the top supported thereby for preventing shifting of such top relative to such base, said spacers and said floor components forming a plurality of gaps of hexagon cross section at the apexes of floor components, and a plurality of plugs of hexagon cross section substantially filling said gaps.