The new entertainment standard, BS EN 17206:2020 titled Entertainment technology.Machinery for stages and other production areas. Safety requirements and inspections was published in June 2020 and replaces the previous entertainment standards BS 7906-1:2005 and BS 7905-1:2001. B.1 General The following use cases (see Table B.1 to Table B.3) are defined to reflect common machinery risk scenarios ranging from relatively low to high. For each use case, guidance on the safety functions to be implemented is given in Annex C. B.2 Upper machinery
SD – Statically determinate load system In statically determinate load systems all loads and reactions (applied loads of the individual axes and therefore of the suspension points) are known. Examples of statically determinate load systems include: loads on individual axes (point load or multi-line winch); distributed loads on two axes.
Recommended safety functions and measures C.1 General The following Table C.1 to Table C.3 contain guidance on the most common safety functions to be considered for a range of machinery movement use cases. For each use case guidance on the safety functions to be implemented is given based on a generic risk assessment. The machinery designer should consider the following non-exhaustive lists of safety functions but is still responsible for performing their own risk assessment and should consider additional safety functions to address specific hazards. Key: — The safety function has no recommendation for or against being used; R The safety function is recommended for this use case; HR The safety function is highly recommended for this use case. If this safety function is not implemented, then the rationale behind not using it should be detailed. C.2 Upper machinery
a Although it is sometimes argued that an Emergency stop is not a safety function, in the context of stage machinery it could be considered part of the operator safety loop. b UC2 – either Loss of Group Synchronisation or Overload Protection shall be provided. c UC4 – either Loss of Group Synchronisation or Overload Protection shall be provided. d Required only where over travel could result in mechanical damage or failure. e Protection against brake failure includes brake air-gap monitoring and similar technologies. Manual inspection of brakes to ensure their safety shall always be undertaken for all classes of machine.