Abstract: A support assembly primarily designed to be connected in supporting relation to a scaffold and structured, through placement of its various components, to move the scaffold assembly along an inclined surface such as on a roof. The support assembly includes a frame and preferably at least two support wheels extending outwardly from said frame and into movable engagement with the inclined surface so as to support the frame thereon. A platform for interconnection to the scaffold element is movably and adjustably positioned on the frame by means of a platform positioning assembly which, through its interconnection to the platform, defines the platform's angular orientation relative to the plane.