If T and R are the tread and rise of a stair which carries a load w per square metre on slope, the corresponding load per square metre of the horizontal area, is

RCC stands for Reinforced Concrete Cement. In a RCC framed structure, the load of the building structure is transferred from slabs to beams, then to the columns and lower columns, and eventually to the foundation. The design of any reinforced concrete structure starts with the understanding and behaviour of the structure to be designed under load.