Hi I am writing to you from India. I am building a house and I would like to build a stair similar to this. However, I am thinking of doing it with wood as I can do a bit of woodworking myself. Will it be possible for you to share the design of this stair so I can build it from scratch?! I can pay for the cost of the design. My questin basically is how does the structural element work if I use wood, how do I fix this to the wall and where does the stair gets its strength?! Thanks. Ranga