Abstract: A cover for an opening in a cargo container comprises a flexible curtain secured at the top of the opening to the container. The curtain has at its sides and lower portion peripheral tunnels accommodating at least one peripheral strand, and at its back inclined tunnels accommodating at least two bracing strands, and has at its lower portion spaced apart fittings, including each guiding and attachment means for the strands, and a first part of a two-part over-center clip. Said first part is engageable with the second part of the clip, the second part being attached to the container within or adjacent the opening.

Abstract: A joint for a sheet and a structural element, which may itself be a sheet. The sheet is along its portion to be joined to said element shaped to have an elongate, substantially trough-shaped part and the element has a complementarily shaped profiled part engageable with the trough-shaped part. The joint includes removable clamping means for taking up forces which, in use, act in a direction tending to disengage said parts. The parts are so shaped that one of the parts is snugly interengageable with the other part such that, where the parts are in contact with each other, loads transmitted, in use, between the sheet and the element are transmitted substantially by compression, that the parts are interengageable by simple insertion of one of the parts into the other, and that the clamping means are, in use, stressed substantially only in tension.