How about the duplex building 16 floor? What's wrong with duplex buildings?

Duplex buildings are also called duplex houses. Duplex residence generally means that each household adds a mezzanine on the higher floor. The total height of the two floors is much lower than that of duplex houses (3.3m for duplex houses and 5.6m for ordinary duplex houses), and the lower floors are used for daily life, such as cooking, dining and bathing. The upper floor is used for rest, sleeping and storage. The advantages are: (1) the plane utilization coefficient is high, and the use area of the house can be increased by 50% ~ 70% through the interlayer; (2) The indoor partition is a wooden structure, which integrates partition, furniture and decoration, and is not only a wall, but also a floor, bed and cabinet, which reduces the comprehensive cost; (3) The upper floor adopts sliding window, which has good ventilation and lighting. Compared with ordinary houses with the same height and area, the land utilization rate can be increased by 40%. The disadvantages are as follows: (1) The duplex residence has a wide area and a small depth. If the indoor corridor plane combination is adopted, some units will inevitably have poor orientation and poor natural ventilation and lighting; (2) The floor height is too low. If the kitchen is only 2 meters high, it is easy to feel uncomfortable after long-term use; The storage room is very large, but the height is only 1.2 meters, so it is difficult to make full use of it. (3) Because indoor partitions and floors are made of thin wooden boards, the wood cost is high, the sound insulation and fire prevention functions are poor, and the privacy and safety of rooms are poor.