Rebar/Reinforcement that a staircase take is the most complicated job for the construction workers. They have a lot of troubles before they gain the experience and understand the function that it will have in the future, so they could predict possible future problems while the construction. Reinforced Concrete Stairs have lots of benefits:
1. Strong fire resistance capabilities

2. Long-lasting, solid, nice looking and presented non-slippery
3. Conveniently designed for higher widths, higher length and any height

4. Moulded in any type of shape to meet the needs of the architect
5. Easily refined

6. Very nominal or zeroMaintenance Cost
7. Possible Pre-cast or cast-in-situ
8. To modify their look, R.C.C. stairs can be covered/finished with fine slabs of stone, marble tiles or terrazzo finish

Source.

...