TG20:13 provides a range of compliant scaffolds, which can be boarded at any number of lifts, but only two platforms can be used as working platforms at any one time.TG20:13 provides compliant scaffolds for a limited range of cantilever scaffolds, loading bays, static towers, use of rakers, bridges and protection fans.The above list is not exhaustive and any scaffold that is not a standard configuration or does not comply with published manufacturers' guidelines will require a specific design produced by a competent person. any scaffold structure not mentioned above that falls outside the 'compliant scaffold' criteria in TG20 or similar guidance from manufacturers of system scaffolds.masts, lighting towers and transmission towers.sealing end structures (such as temporary screens).system scaffolds outside manufacturers guidance.radial / splayed scaffolds on contoured facades.towers requiring guys or ground anchors.staircases and fire escapes (unless covered by manufacturers instructions).temporary roofs and temporary buildings.access scaffolds with more than the 2 working lifts 2.all shoring scaffolds (dead, raking, flying).Scaffold structures that normally require bespoke design To ensure stability for more complex scaffolds, drawings should be produced and, where necessary, these may need to be supplemented with specific instructions.Īny proposed modification or alteration that takes a scaffold outside the scope of a generally recognised standard configuration should be designed by a competent person and proven by calculation. This is achieved by following the guidance provided by the NASC in document SG4 'Preventing falls in scaffolding' for tube and fitting scaffolds or by following similar guidance provided by the manufacturers of system scaffolding.įor scaffolds that fall outside the scope of a generally recognised standard configuration the design must be such that safe erection and dismantling techniques can also be employed throughout the duration of the works. to enable recording, referencing and checkingĪll scaffolding must be erected, dismantled and altered in a safe manner. any other information relevant to the design, installation or use of the scaffold.information can be included in relevant drawings if appropriate.details of additional elements such as beamed bridges, fans, loading bays etc, which may be a standard configuration (see note 1 ref TG20:13) or specifically designed.maximum tie spacing both horizontal and vertical and tie duty.platform boarding arrangement (ie 5 + 2) and the number of boarded lifts that can be used at any one time.type of scaffold required (tube & fitting or system).Prior to installation, the scaffold contractor or scaffold designer can then provide relevant information about the scaffold. any restrictions that may affect the erection, alteration or dismantling process.information on the structure/building the scaffold will be erected against together with any relevant dimensions and drawings.nature of the ground conditions or supporting structure.any specific requirements or provisions eg pedestrian walkway, restriction on tie locations, inclusion/provision for mechanical handling plant eg hoist).whether there is a requirement for sheeting, netting or brickguards.type of access onto the scaffold eg staircase, ladder bay, external ladders.maximum working loads to be imposed and maximum number of people using the scaffold at any one time.height and length and any critical dimensions which may affect the scaffold.period of time the scaffold is required to be in place.Typically this information should include: It is a requirement of the Work at Height Regulations 2005 that unless a scaffold is assembled to a generally recognised standard configuration, eg NASC Technical Guidance TG20 for tube and fitting scaffolds or similar guidance from manufacturers of system scaffolds, the scaffold should be designed by bespoke calculation, by a competent person, to ensure it will have adequate strength, rigidity and stability while it is erected, used and dismantled.Īt the start of the planning process, the user should supply relevant information to the scaffold contractor to ensure an accurate and proper design process is followed. This guide is intended to clarify when a scaffold design is required and what level of training and competence those erecting, dismantling, altering, inspecting and supervising scaffolding operations are expected to have. Falls and trips in construction 2007-2010.Controlling physical ill health risks - Key points.Controlling hazardous substances - Key points.Overview - Controlling hazardous substances.