A civil Engineer spends 4-5years in the University studying to become a civil engineer, after graduation, he spends addition 5-10years to master the skills to enable him take on a structure on his/her own.....
Building Design is divided into two... Structural analysis and structural design...
The 460N/mm2 is the steel strength of a particular bar,and when used in design it would produce the required steel area for that class of strength... Like in Nigeria, it's 460N/mm2 that's readily available so we tend to use it in all our designs except for special placed orders from the steel...
The architect Primary Objective is to make the Building Aesthetically Pleasing, Your Job is to make the building structurally sound....In Limit State design Structural Soundness supercedes Aesthetics. Make the building sound even if it means tweaking the architectural plan a bit in consultation...