Support and related shelf

A support apparatus comprising:

• at least one rigid frame member;
• at least one shelf member having a longitudinal axis and an end surface coincident with the axis;
• a first coupler pair including first and second couplers mounted to the end surface and a second coupler pair including third and fourth couplers mounted to the frame member within a coupling plane, the second pair delineating at least one clearance region within the coupling plane, the couplers operative to selectively mount and dismount the shelf member to the frame member;
• the couplers including first and second pins and first and second slot delineators, the first and second delineators defining first and second pin support surfaces and forming first and second passageways from the first and second support surfaces, respectively, each passageway wide enough for one of the pins to pass through;
• when the shelf member is mounted to the frame member, the pins are essentially parallel to the axis and bearing against the support surfaces, the passageways defining paths which are essentially perpendicular to the axis, are within the coupling plane and which open into the clearance region, wherein:
• with the first and second pins received on the first and second support surfaces, respectively, the shelf member is supported in a first position and the paths are essentially perpendicular to the axis, within the coupling plane and open into the clearance region so that the shelf member is dismountable from the frame member by moving the shelf member essentially perpendicular to the axis such that the pins pass through the paths and the first and second couplers pass into the clearance region.