The challenge was to demolish a chimney stack with an incredible height of 250 metres. To do so in completely safe conditions, we used the special hydraulic platform 'Red o-Ring' that we designed in-house. An intelligent tool that is mounted on the top of the chimney and descends step-by-step, as the demolition proceeds, retaining all that the demolition work produces within itself. The chimney keeps everything inside, dust included.