depending on how big the size of the structure and also depends on the style that can be resisted by the building, for example the size is often used usually for house blocks 20/25 centimeters and 25/30 centimeters for simple homes, and If for 2-storey house then beams and columns should be bigger than a simple house because the greater the force received by the beams and columns.
depending on how big the size of the structure and also depends on the style that can be resisted by the building, for example the size is often used usually for house blocks 20/25 centimeters and 25/30 centimeters for simple homes, and If for 2-storey house then beams and columns should be bigger than a simple house because the greater the force received by the beams and columns.