Abstract: One or more elongated roller assemblies may be selectively mounted at a variety of positions along the inner edge of a scaffold platform. The inner and outer edges of the platform each include a series of correspondingly spaced apertures therethrough which receive the support rods or shafts of the roller assemblies. When the roller assemblies are emplaced the rollers lie between the inner edge of the platform and the vertical wall of the building along which the scaffolding is moving, and the mounting or support rods extend entirely through the platform and act as reinforcement of the assembly.