A rack has a frame and a plurality of shelves. Each shelf has an enclosing frame member that has two first sides connected by two second sides, a connecting bar that connects the first sides at about the center of the first sides, a plurality of slots provided on the inner surfaces of the second sides, and a plurality of slats, each slat having opposing ends that are fitted into opposing slots at the second sides, and with each slat being connected to the connecting bar. At least one connector is provided for removably connecting each shelf to a portion of the frame.

A modular skid assembly is disclosed. The modular skid assembly includes a skeletal framework configured to house electrical equipment components and support power cables routed between the electrical equipment components, wherein the skeletal framework is configured to house electrical components in two parallel rows with an aisle between the two parallel rows, the skeletal framework including an upper superstructure, a lower superstructure, and one or more vertical columns connected between the upper superstructure and the lower superstructure. The upper superstructure includes a first horizontal support and a second horizontal support. The upper superstructure includes a lower cable tray having a plurality of tray supports fixed to at least one of the first horizontal support and the second horizontal support and extending over the aisle from the first horizontal support towards the second horizontal support. The lower cable tray includes a plurality of rungs fixed to a first of the plurality of tray supports and a second of the plurality of tray supports.

Provided is a used packaging box organizing frame including a front frame located at a front to prevent used packaging boxes from falling in a front direction, a rear frame located at a rear spaced apart from the front frame to prevent the used packaging boxes from falling in a rear direction, and connection pipes configured to connect the front frame and the rear frame and support lower portions of the used packaging boxes to be located on a horizontal surface spaced apart from the ground, wherein the front and rear frames include pipes and connection members having insertion holes into which ends of the pipes are inserted. The pipes are formed by being inserted into the insertion holes of the connection members. The connection pipes include an outer pipe with a large diameter, and an inner pipe with a small diameter slidably inserted into the outer pipe.

A rack assembly has two support frames and at least one shelf that are secured to the support frames by connecting assemblies. Each connecting assembly comprises a well secured to a medial surface of each vertical tube of the support frame, and a hook that extends from each end of each shelf, with each hook having an opening extending therethrough. The connecting assembly also includes a connector that is seated inside each well, each connector having a top plate that has an elongated opening, the connector also having a body that is sized and configured to fit inside a well, the body defining two wings with a space between the wings, and wherein each wing has a bump positioned in the center of the inner surface of each wing that faces the space. Each hook is inserted through the elongated opening of a corresponding connector with the bump on each wing fitted inside the opening of the hook to retain the hook inside the body of the connector.

A rack has a frame and a plurality of shelves. Each shelf has an enclosing frame member that has two first sides connected by two second sides, a connecting bar that connects the first sides at about the center of the first sides, a plurality of slots provided on the inner surfaces of the second sides, and a plurality of slats, each slat having opposing ends that are fitted into opposing slots at the second sides, and with each slat being connected to the connecting bar. At least one connector is provided for removably connecting each shelf to a portion of the frame.

A crossmember is disclosed that includes an elongate rod portion and two latching claws. The rod portion has a central longitudinal axis, a first longitudinal end and a second longitudinal end substantially opposite the first longitudinal end. The first latching claw is arranged at the first longitudinal end of the rod portion and the second latching claw is arranged at the second longitudinal end of the rod portion. The first latching claw and the second latching claw each include a gripping portion shaped to correspond to a rod-shaped element and are designed to be mounted on the rod-shaped element without tools. The gripping portion of the first latching claw is offset from the gripping portion of the second latching claw with respect to the central longitudinal axis of the rod portion.

Beams and posts are disclosed. The beams and posts may be used for racks or shelving. The beams and posts may be formed by folding a sheet of metal. For example, the beams and posts may be non-volumous or hollow. Optionally, a portion of the wall of the beam or post is thickened, for example, by folding over the metal back and forth. Optionally, the thickened portion runs the length of the beam or post. In some embodiments, a fastener (e.g., a loop and/or hook) is formed in the thickened portion of the wall. For example, the fastener formed by punching out of the wall. Optionally, the fasteners are used to connect the posts to the beams.

A rack has a frame and a plurality of shelves. Each shelf has an enclosing frame member that has two first sides connected by two second sides, a connecting bar that connects the first sides at about the center of the first sides, a plurality of slots provided on the inner surfaces of the second sides, and a plurality of slats, each slat having opposing ends that are fitted into opposing slots at the second sides, and with each slat being connected to the connecting bar. At least one connector is provided for removably connecting each shelf to a portion of the frame.

A rack has a frame and a plurality of shelves. Each shelf has an enclosing frame member that has two first sides connected by two second sides, a connecting bar that connects the first sides at about the center of the first sides, a plurality of slots provided on the inner surfaces of the second sides, and a plurality of slats, each slat having opposing ends that are fitted into opposing slots at the second sides, and with each slat being connected to the connecting bar. At least one connector is provided for removably connecting each shelf to a portion of the frame.

A rack assembly has two support frames and at least one shelf that are secured to the support frames by connecting assemblies. Each connecting assembly comprises a well secured to a medial surface of each vertical tube of the support frame, and a hook that extends from each end of each shelf, with each hook having an opening extending therethrough. The connecting assembly also includes a connector that is seated inside each well, each connector having a top plate that has an elongated opening, the connector also having a body that is sized and configured to fit inside a well, the body defining two wings with a space between the wings, and wherein each wing has a bump positioned in the center of the inner surface of each wing that faces the space. Each hook is inserted through the elongated opening of a corresponding connector with the bump on each wing fitted inside the opening of the hook to retain the hook inside the body of the connector.