These split-post boltless shelving units have wire decking with openings that allow air to circulate through it for ventilation. Water can pass through the decking if sprinkler systems turn on. The decking installs over the shelving units’ beams to distribute the weight of items placed on the decking across the beams. Split-post boltless shelving units can be assembled vertically to create a tall shelving unit or horizontally to create a short shelving unit that can double as a workbench