when the servicing units are assembled side by side fig6 shows at the lower level main structural uprights 115 and a beam 116 spanning between the uprights with other vertical structural members 72 supporting the beam 116 between its ends these main structural members 70 115 and 116 can be replaced or configured as needed for the size and arrangement of the facility being assembled fig9 shows one preferred structural assembly for a unit 24 of the system in a partly assembled frame 112 the frame is shown without the decking or platform components 80 34 36 78 30 38 etc those are shown primarily in fig1 and 11 which should be considered in conjunction with fig9 and fig5 as shown in fig9 the vertical structural components 72 preferably have some form of pad or foot 118 at the lower end of each such member for bearing against the building floor as seen in fig5 and 9 the upper or a level is supported at the deeper or wall end of the unit by beams 70 a and 74 a with the work platform 80 on which the cabinets 98 and 100 are located spanning between those horizontal beams additional horizontal beams or joists can span between the beams 74 a.