Also this type of staircases is a typical variation in the range of building staircases. Single stairs are saddled onto bars below and mounted safely with dowels or z-brackets.
The saddling - especially with straight staircases - is a quite simply calculable and unsophisticated construction, that has also optical attractions. This principle is also suitable for spiraled staircases as well as for the combination of different materials such as wood or steel.
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