But in this case, the staircase will look rude.

There are two types of stairs made of oak: straight and rotary.

Balks located under the slope (Kosoura) on which the steps are held can be made of both metal and other species of wood. But in this case, the staircase will look rude. It will be better if all the elements of the stairs are: railing, balusters, steps and kosuurs will be made of one material — oak.