Importance

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Abstract

A floor panel having a substantially planar upper tread surface comprises a cast grating having first and second pairs of substantially planar, external sidewalls with upper side edges of the sidewalls approximately coinciding with the upper tread surface; a pair of substantially planar slats spaced closely adjacent to each other and extending from the first pair of opposite sidewalls across the frame, with the central, longitudinal planes of the slats being oriented substantially perpendicular to the upper tread surface of the floor panel and substantially parallel to each other, and further with upper side edges of the slats approximately coinciding with the upper tread surface, wherein the spacing between the slats is such that a fastener can be frictionally engaged between the slats for secure attachment to the slats; a plurality of substantially planar ribs extending from the first pair of opposite sidewalls across the frame, and being spaced apart from each other and from the pair of slats; and a plurality of substantially planar cross ribs extending from the second pair of opposite sidewalls across the frame, and further being spaced apart from each other and forming common intersections with the ribs and said pair of slats.

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First Claim