having a first face and a second face the corrugated sheet has alternating ridges and open ended channels extending across each of the first face and the second face between the first portion and the second portion the first portion has a first collection channel adapted to collect liquids from the open ended channels of the middle portion when flow is along the first face in a first direction the second portion having a second collection channel adapted to collect liquids from the open ended channels of the middle portion when flow is along second face in a second direction application_number US 31818905 A description exemplary embodiments of the invention which are non limiting will now be described with reference to fig1 through fig8 referring to fig1 an embodiment of the present invention 10 is illustrated a chemical process tower 12 is fitted with a plurality of trays 14 each tray having a top side 16 a bottom side 18 and apertures 20 extending between bottom side 18 and top side 16 tray 14 extends for a portion of the width of tower 12 a majority of an edge 22 of tray 14 is adjacent an inside surface 24 of walls 26 of tower 12 a weir 28 is situated along the remaining edge 30 of tray 14 and on the other side of said.