Cellular floor headertrough

Claim 1

A HEADERTROUGH COMPRISING A LONGITUDINALLY EXTENDING TROUGH-LIKE MEMBER FORMED FROM A HORIZONTAL BOTTOM WALL INTERCONNECTED WITH A PAIR OF SPACED VERTICAL SIDE WALLS, THE LONGITUDINALLY EXTENDING TOP MARGINAL PORTION OF EACH OF SAID SIDE WALLS BEING PROVIDED WITH LONGITUDINAL RIM STRIPS FORMED FROM A HORIZONTAL PLATE PORTION TERMINATING ALONG THE OUTER MARGIN THEREOF IN AN UPSTANDING RIM-LIKE PORTION, A SERIES OF HORIZONTALLY EXTENDING COVER PLATE SECTIONS SPANNING THE TOP PORTION OF SAID TROUGH-LIKE MEMBER WITH OPPOSITE SIDE MARGINS OF SAID COVER PLATE SECTIONS OVERLYING THE HORIZONTAL PLATE PORTIONS OF SAID RIM STRIPS BUT TERMINATING SHORT OF SAID RIMLIKE PORTIONS, AND SPACED PARALLEL LONGITUDINAL COVER PLATE LIKE PORTIONS, AND SPACED PARALLEL LONGITUDINAL COVER PLATE SECTION SEATING MEANS BETWEEN SAID COVER PLATE SECTIONS AND SAID RIM STRIP HORIZONTAL PLATE PORTIONS, EACH OF SAID SEATING MEANS INCLUDING A HORIZONTAL PLATE-LIKE BODY PORTION PROVIDED ALONG ONE LONGITUDINAL SIDE MARGIN ONLY THEREOF WITH A VERTICALLY DIRECTED MARKER RIB WHICH TERMINATES ABOVE THE TERMINAL EDGE OF SAID RIM STRIP RIMLIKE PORTIONS, THE BOTTOM SURFACE OF THE BODY PORTION OF SAID SEATING MEANS BEING FLAT AND THE TOP SURFACE OF SAID SEATING MEANS BEING FLAT INWARDLY OF SAID MARKER RIB FOR SELECTIVE REVERSIBLE POSITIONING OF SAID BODY PORTION BETWEEN SAID COVER PLATE SECTIONS AND SAID RIM STRIP HORIZONTAL PLATE PORTIONS FOR PLACING THE MARKER RIB THEREOF IN UPRIGHT PROJECTING RELATION BETWEEN A SIDE MARGIN OF A COVER PLATE SECTION AND AN ADJACENT RIM-LIKE PORTION AND IN DOWNWARDLY PROJECTING PROTECTED RELATION INWARDLY OF AN INNER EDGE OF A RIM STRIP HORIZONTAL PLATE PORTION WHEREBY THE MARKER RIB, IN DOWNWARDLY PROJECTING RELATION, IS PROTECTED DURING HANDLING.