How long will the floor room stop ringing? But it has been ringing for several years, and it is even more horrible at night, which makes the family panic and dare not live at home.

The prefabricated panels needed to build a building are processed in the factory and then transported directly to the construction site for installation, so they are called prefabricated panels. Precast slab is convenient to construct and low in cost, but its seismic performance is not high. Prefabricated boards are no longer advocated. Building structures generally adopt cast-in-place structures, such as multi-storey mixed structures. During construction, the floor slab is poured together with the constructional column and ring beam, which has the advantage of good integrity, that is, it is stronger.