Installing stairs
When constructing a flight of stairs, the first step is to install the stringer that will support the staircase. Different kinds of stringers can be used for stairs made of wood, steel or concrete.
Next, determine the correct number of risers and treads. Divide the vertical distance from one floor to the next by the desired riser height. The result will be the number of risers needed. The number of treads is determined by dividing the horizontal distance by the desired tread depth. A nosing can extend each tread to provide for a secure foothold. Also remember that landing must be placed to divide a long staircase into smaller sections.
A handrail is an important safety feature of every staircase. You may need to install a special balustrade to a decorative set of stairs. First, install a newel post at each end to support the balustrade. Then, install the baluster columns and place the handrail / banister on top. Last, if there is a floor beneath it, the spandrel underneath the staircase can be used for storage or some other function. Otherwise, it can be closed off.