Snap line and anchor ring positioning → embedding of reinforcement anchor ring → completion of beam slab concrete pouring and reaching strength → I-beam welding of positioning bar, installation of I-beam and fixation with anchor ring → installation of first step large cross bar and fastening with each upright bar → installation of first step small cross bar → installation of first tie bar → installation of second step large cross bar → installation of second step small cross bar → addition of temporary diagonal brace, upper end fastening with second step cross bar → installation of third and fourth step large cross bar and small cross bar → installation of second tie bar → connection of vertical bar → installation of each step large cross bar and small cross bar layer by layer → addition of shear bracing → laying of scaffold Board → hang safety net.
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