Reinforced concrete is considered as the most effective construction materials among all the materials mentioned in the image for building up the stairs.
The reinforced concrete offers the following benefits :-
They contain necessary fire resistance capabilities in large part
They are long-lasting, durable, attractive in appearance as well as simply rendered non-slippery.
They are designed for superior widths, longer spans and any height.
They can take shape in any preferred form to match the need of the architect.
They can be easily cleaned.
The cost of maintenance is very nominal.
They can be pre-cast or cast-in-situ. y p
To modify their look, R.C.C. stairs can be enclosed/finished by thin slabs of stone, marble tiles or terrazzo.