This document specifies the minimum requirements necessary to ensure the safe design, calculation, manufacture, assembly, operation, disassembly, inspection and maintenance of the following, but not limited to: indoor and outdoor structures e.g. Stage roofs, stage floors, follow spot towers, PA towers, LED support structures, one-off event structures, hospitality structures, temporary spectator facilities. The above hereafter called event structures which are intended to be installed and dismantled specifically for an event.