Some different methods of racking and shelving include free-standing units with multiple set levels, adjustable levels, or anchored levels, as well as wall- or ceiling-mounted metal racks. It is also possible to create combination systems that include configurable wall-mounted and free-standing units to meet different space requirements.
One common type of shelving method involves the use of a standard case system, wherein the structure has solid walls anchored to a solid base and top layer, often with a backing plate or sheet. Within the case are several horizontal shelves that run the full width, or half the width in the case of larger shelves, typically attached to the sides with pegs or locking mechanisms. Some case shelving methods also allow for adjustable center shelves, though the base and top must remain stationary to ensure structural integrity. Variations on these systems include the use of poles at the four corners rather than solid walls to create a sense of open space.
Wall-mounted shelves are another common racking method that involves affixing support beams to a wall using special screws to match the wall material. These rods include adjustable tracks that allow shelves of various lengths and heights throughout the system. Similarly, ceiling-mounted shelving racks drop down from the top of the room and provide single levels of storage high above the ground.