Hjelp til å bygge trapp/ Help to build stairs

Jeg trenger litt hjelp til å bygge trapp, Trenger å bygge 4/6 fundament. Ca. 10 m lang trappa. Trappa trinn skal fra metall. En platform må bygges mellom trappa. Bygge trapp som er i bildet. i need help to make outside stairs. Will have to make 4 or 6 fundamentals to support the stairs. The stairs need to be around 10 m. The sides of the stairs needs to be made in wood and the steps needs to be made from metal. a platform needs to be made from metal in between the stairs. Example of stairs is given in picture