An apparatus (600) for use in unpacking or packing shipping containers (700) includes at least one barrier part which provides a barrier to wheeled powered material handling equipment (1105). The barrier part can be positioned substantially transversely across an interior of a shipping container (700) at a desired position along the length of the interior of the shipping container, to provide a working area (1120) within the shipping container in which personnel may work on foot, and substantially impede or prevent entry of wheeled powered material handling equipment into the working area. The apparatus may be provided with an arrangement to substantially maintain its location in the desired position against forces resulting from impact by the powered material handling equipment operating within the shipping container.