Yes, we know how precise, difficult and serious work is to plan a staircase. The experience needed for the planning, calculating and building it is the most important here. The most stairs need a steel or iron net for making the construction more firm and stable for use. The stair bars that a staircase structure needs can be lowerdistribution of rebars or upper distribution of rebars.  See these images and how does it looks on a computer plan.

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