The sheathing of a metal staircase

When lining the metal frame, a tree is used. At the same time, different methods can be used: approaches or their absence, wooden railings, balusters, metal rails. To decorate the steps, you can use such types of wood as pine, larch, oak, beech, ash. For the upper part of the steps, you need to use a material that is resistant to wear (oak, ash, beech).