Spiral staircase is a construction complex project that requires a serious approach(Useful Spiral Staircases Construction Guide). Such work is usually trusted to professionals. But if you do decide on building a spiral staircase by your own. You need to start with the design and calculations. Determine the type of structure first, which will need a subsequently calculations. The design of the side supports is called “well” in the walls of which are built in stages or spiral string. The role of the casing support is very important and you can use a steel pipe with a diameter 6-8 cm with a wall thickness of at least 5 mm.

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