Pallet extensions provide support for items of cargo beyond either the short or the long sides of a pallet, allowing increased volume to be achieved. The extensions are designed to suit the contour of wide-bodied aircraft. Each extension consists of a panel or shelf extending upwards and outboards within an envelope bounded by the ULD contour (see Figures 1, 2, 3, and 4). The panel or shelf is secured in this position by means of chains, cables, or structural members attached to the rails of the adjacent sides of the pallet edge.