Stairs are not missing corners. Generally speaking, there is no corner in the stairwell, because it is with the stairwell that our house can form a complete and square pattern. They belong to people's application and activity space and are actually used. Therefore, the stairwell can't be counted as the corner of the house.
House corner meaning:
1, the house lacks corners, that is, it is not a square house with irregular shape. The missing corner of a building refers to the missing corner on one side of the building, or the missing corner is within two thirds. The house is concave or inclined, irregular square or fuzzy inclined polygon, and its center of gravity is shifted, light and biased, or inclined from left to right, or large in front and small in back.
2. The quadrangles in China's ancient culture were all designed with its square houses, which were the safest and most blessed homes. Where does the word corner of the house come from? Simply put, this is based on the ancient theory that the sky is round and the place is round. But in many modern houses, it is not reflected at all, so the word "missing corner" appears.
3. The corner of the house is centered on the center of the house, and the farthest point connecting the house is drawn as a circle with a radius (including the inner balcony, but excluding the outer balcony and bay window). If the length of the corner-missing part is equal to or greater than the whole radius 1/2, it can be regarded as corner-missing, and if it exceeds 2/3, it can be regarded as serious corner-missing. If it is less than 2/3, it is not the main direction that is missing. For example, the southeast corner of the house is missing, which is the position of the eldest daughter. It doesn't matter much if there is no daughter at home.
Refer to the above? Baidu Encyclopedia-House is short of corners