Timber Springs Lodge: Floating Stair Update

The initial balance test C-Channels cantilevered from concrete wall with epoxy anchors Cedar treads routed to accept C-Chann.

I write this time to ask for advice on how to pose two steps to make a staircase outside a house under construction. The width of the staircase would be 120 cm. And we have the idea to make it formwork - shack and steps to everything .