Hi. My name is Roman
Welcome everyone in the new year. I put the sheet into the structure of the stairs. It can be supplemented or improved for sure. Sometimes I used the good work of the participants of this forum and somebody will find some fragments of their work in this sheet. That is why I leave my work for everyone's use. Have fun.
I changed the picture with the parameter designation and added a few functions supporting the calculation of the required reinforcement. I used the EC for the calculations. Have fun.
Very nice. It would be useful to be able to easily pull the coordinates out and plug them into CAD.
I am using Mathcad for checking the algorithm. After checking, you can use an algorithm to write a program in Visual Lisp. Then it is easier, fewer things will surprise you. I have not seen the export to Autocad, but maybe it is somewhere.