Old communities are usually 3-4 floors. Because this building material can maximize the use of space, many houses in Shanghai in the 1960s and 1970s were houses with thin-walled small beams, which generally did not reach the height of 6 stories, so they should not be houses with thin-walled small beams.
Thin-plate houses with small beams are rare now, but they used to be common in Shanghai. This kind of house is defined as a house built with precast concrete slabs. It is very convenient and fast to build this kind of house, but it also has many shortcomings. For example, the structure of the house is not very solid, the depth of the foundation is relatively shallow, and the stability of the house is relatively poor.