Minimum & standard size of concrete slab, beam, column and foundation

What are the minimum and maximum diameter of bar used in slab, beam and column

How to reduce column size in construction

What is the minimum and maximum distance between two column

How to calculate number of steel bars in column

Which is best mm bar used for 1, 2 and 3 storey building

Iron rod/steel size for 9″×12″(230mm×300mm) rcc column

What size beam do I need for a 10 to 12 foot span?

What size beam do I need for a 24 foot span?