Abstract: In a frame scaffolding system a guard rail is provided. The guard rail is intended to be positioned adjacent an upper layer of the frame scaffolding, but is initially positioned adjacent a lower layer of the frame scaffolding and can be manoeuvred into position by personnel standing on the lower layer. Vertical members of the scaffolding system are provided with guiding and support assemblies, and the guard rail has elements which co-operate with the guiding and support assemblies. The guard rail is thus guided during movement between the initial lower position and the terminal upper position. Support elements are also provided to support the guard rail at at least one intermediate position between the initial position and the terminal position to facilitate the lifting procedure.