Angular sections form frames which can be fitted together in the frame plane in modular fashion. Legs of the sections are formed so that through two interconnected legs of adjacent frames notches of T-shaped cross-section result, into which hammer head-shaped ends of pull rods can be introduced. By means of the pull rods, ledges can be pressed against filter and/or light fixture housings, which in this manner are pressed against legs of the profiles on the opposite housing side, adjacent frames thus make it possible in a correspondingly compact model to attach filters and light fixtures without the distance between two adjacent filters or between a filter and a light fixture occupying a width that would impair the flow profile of the air issuing from the filters.
A device for the support of ceramic catalyst monoliths especially of square cross section as well as for the combination of several of such monoliths into one package. It is formed of an elastic gasket attached on one or both monolith ends and a metal frame attached on the gasket under pressure. The frame has recesses on two adjacent lateral surfaces, and at the two opposite lateral surfaces it has projections which can engage interlockingly into the recesses of adjacent frames.
A device for the containment of ceramic catalyst monoliths particularly of four cornered cross sectional area as well as for the combination of a plurality thereof into a package. The device includes elastic gaskets arranged on one of the ends of the monoliths and partitions for the form fitting containment of the elements into a cassette.
A filter plenum module has upper and lower peripheral frame extrusions providing vertically opposite and facing channels receiving side panels secured with fastenings traversing the inner flanges of the channels to engage the panels. Top closure panels are received on horizontal flanges of the top peripheral frame. Fastening and caulking are thus applied all from the inside, as the modules are constructed. Top panels are interconnected by reinforcing beams carried exclusively by the panels. These beams provide the principal support for the grid beams supporting the filter units. The peripheral beams also carry terminals that can be selectively placed to support the plenum assembly, according to the conditions available in the ceiling structure at the point of installation. Angle members are inserted in receptacle channels at the mitered corners of the peripheral beam extrusions for initial alignment.
A tubular structural member, such as a horizontal box beam or vertical column, includes a set of elongated flange members of reinforced pultruded plastics material, and each flange member has longitudinally extending U-shaped opposite edge portions defining slots. Generally flat composite web members have opposite edge portions projecting into the slots, and epoxy adhesive rigidly secures the interfitting edge portions to form a tubular box-beam or multi-sided column. The web members may have curved or tapered opposite edge portions to form a beam with camber or a tapered column having a polygonal cross-sectional configuration. Reinforcing plates or ribs may be adhesively bonded to the flange and/or web members according to the structural loading on the member.
A clean room ceiling structure includes a support structure and filter units with a filter frame and a filter secured in the filter frame. The filter frames are connected to the support structure. The filter units have sealing fluid grooves for sealing the filter units relative to the support structure.
