According to the previous theory of building a house, when the front and back neighbors build a house and the back house is built, the front door cannot be photographed with the roof beam of the front house. Now building a house, usually a bungalow or a building, does not exist this problem.
In feng shui, it is not suitable for beam to top. If this happens, it will affect the owner's career and wealth. From a scientific point of view, the top of the beam will make people feel depressed and indirectly affect people's lives.