The present disclosure relates to shelving systems and methods that are adaptable to a number of applications, including building heating, ventilation, and air conditioning (“HVAC”) systems, shelving units for holding children's games and toys, closet organizers with hangers and shelves, storage systems in a garage or workshop, storage shelves over a garage door, and as a shelving unit for audio and visual equipment. The shelving unit includes a means for attachment to an overhead member, such as a steel beam, wood rafter, wood joist, wood beam, or ceiling, a generally J or L shaped bar, the ability to raise or lower the J or L shaped bar to provide for storage at different heights, an extension member removably coupled to the J or L bar, and wherein the extension member has a length that provides for storage space of different widths. In another aspect, an inverted shelving stand is provided. In still a further aspect, a U shaped swiveling hanging unit is provided.