Hello Zhitao,Thanks for the feedback. Here we go,1.The legs of the working platform are not in the way of changed cable tray. As per my analysis, these legs have correct position according to the drawing.2.The only point of concern here is, there is already a cable tray underneath the platform which may come in our way. Note: The space between the ground and working platform is fully covered with metallic sheets and its very hard to watch or take pictures.Let me know, if you have any more question.