Abstract: Apparatus for applying sheet material to framework elements comprises elongate support means for sheet material and means for attachment of said support means to framework elements, in which the elongate support means comprise a base member having upstanding stud members for engagement in use with pre-formed holes formed in the sheet material and a capping member for applying over said base member to apply out-of-plane tensioning deformation to said sheet material, in which the capping member includes groove formations for receiving the edge of sheet material formed as a keder.

Abstract: A roofing structure assembly comprises elongate roofing material support members including means for attachment to roofing scaffold members and a flexible roofing material engageable with said support members, in which the support members include means for tensioning the roofing material between adjacent support members in use.The roofing material is preferably supported above the scaffold members and is tensioned by applying invented channel section capping members over the support members to apply out-of-plane deformation to the roofing material.