Abstract: A floor panel having a substantially planar upper tread surface comprises a cast grating havingfirst 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; anda plurality

Abstract: A device attachable to a suspended floor member (i) for collecting materials which fall through grid openings in the floor member and (ii) for controlling the rate of airflow through the grid openings in an adjustable manner. The device includes a spill container for positioning under the grid openings of the floor member in a coordinated position such that a venting path is provided for permitting airflow past the spill container from above the floor member while retaining the capacity to collect liquids and particulate matter flowing through the grid openings. Adjustable dampening structure is coupled with the spill member to provide selection of differing vent openings to control rate of airflow through the structure.

Abstract: A modular wall system including a plurality of wall panels removably attached between a floor and a ceiling by a head track assembly and a floor track assembly respectively. The wall panels include a core material covered on each face by a thin metal skin and are of sufficient strength and rigidity to allow their placement between the head and floor track assemblies without the requirement of stud members or the like. The head track and the floor track assemblies both comprise gasket elements which prevent the passage of microcontamination around the panel members, and the side surfaces of each panel member contains a gasket which abuts and seals against an adjacent panel member to prevent the flow of microcontaminants around the sides of the panel. The floor track assembly also comprises a fastening member which securely holds the bottom of the wall panel to prevent relative movement therewith.

Abstract: A floor panel having a substantially planar upper tread surface comprises a cast grating havingfirst and second pairs of substantially planar, external sidewalls with upper side edges of the sidewalls approximately coinciding with the upper tread surface;a plurality of substantially planar ribs extending from the first pair of opposite sidewalls across the frame, and being spaced apart from each other;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;wherein the ribs and cross ribs form subdomains between intersections of the respective ribs and cross ribs, the ribs and cross ribs contained within one of said subdomains being left out to form an opening through the floor panel which is larger in size than other openings representing smaller subdomains within the floor panel, said larger opening including a perimeter notch formed at an upper edge of t

Abstract: A modular wall system including a plurality of wall panels removably attached between a floor and a ceiling by a head track assembly and a floor track assembly respectively. The wall panels include a core material covered on each face by a thin metal skin and are of sufficient strength and rigidity to allow their placement between the head and floor track assemblies without the requirement of stud members or the like. The head track and the floor track assemblies both comprise gasket elements which prevent the passage of microcontamination around the panel members, and the side surfaces of each panel member contains a gasket which abuts and seals against an adjacent panel member to prevent the flow of microcontaminants around the sides of the panel. The floor track assembly also comprises a fastening member which securely holds the bottom of the wall panel to prevent relative movement therewith.