A polytunnel arrangement is described that comprises a plurality of legs arranged in a row, the legs together supporting an elongate gutter element 24, the arrangement further comprising a brace 26 secured to the gutter element at a location intermediate a pair of the legs, the brace limiting deflection of the sides of the gutter element. The brace may define at least one rope anchor point 28. The brace may also provide support for an elongate shaft located within the channel defined by the gutter member and the brace may incorporate a bracket 30 through which the shaft extends.
