A clamping apparatus for clamping a sheet to a supporting structure of an agricultural storage apparatus. The clamping apparatus comprises a first clamping section and at least one second clamping section and is attached to a wall of the supporting structure. The, or each, second clamping section comprises a lever section and a catch section pivotably attached to the lever section. In use, a section of the sheet is clamped between the first clamping section and the catch section of the, or each, second clamping section thereby securing the sheet to the supporting structure.
