Is the size of the five-story 45×45 column suitable?

The column size of a five-story building is 45×45.

If it is a main beam, it depends on the load of the secondary beam supported by it. According to the routine, 6m beam, 200*750 or 240*700, 2 erection bars 14, 4 bottom bars 18 or 20. The number of columns depends on your room. For a house with the same area, the more columns there are, the less stress each column bears. If the conventional bay size is 4-6 meters, the number of columns should be 500 or 600 square columns, with more than 8 columns in the lower three floors, and the reinforcement ratio is 16, and the upper two floors can be reduced to 12. Experience, without calculation, is no problem as a private house. If there are special requirements, it is best to ask a professional designer to calculate.