The document is valid for manual counter weight flying systems, underneath which the stay of persons is permitted. This standard applies for theatre stage decor battens in place for performance, meetings, productions, such as theatres, mulit-purpose halls, in film, radio and television.#,,#
DIN 56921-1:1999 history
2010DIN 56921-1:2010 Entertainment technology - Flying systems - Part 1: Manual counterweight flying systems for total loading up to 500 kg
1999DIN 56921-1:1999 Theatre engineering, stage machinery - Flying systems - Part 1: Manual counterweight flying systems for total loading up to 500 kg