Prefabricated Slabs in Brick-Concrete Structure Houses

Brick-concrete structure houses do not necessarily use prefabricated slabs; they are different concepts, and the use of prefabricated slabs in brick-concrete structure houses has gradually decreased.

Basic Concepts of Brick-Concrete Structures and Prefabricated Slabs

A brick-concrete structure refers to a house where the load-bearing system is primarily undertaken by brick walls, and the floor slabs can be either prefabricated slabs or cast-in-place concrete slabs. Prefabricated slabs are made in advance in factories and then transported to the construction site for direct installation. This method offers fast construction speed and lower costs, but relatively poor seismic performance.

Differences Between Brick-Concrete Structures and Houses with Prefabricated Slabs

Brick-concrete structures focus on the load-bearing method of the house, where brick walls bear the main weight of the house. In contrast, prefabricated slabs focus on the construction method of the floor slabs, which are assembled from prefabricated components. Houses with prefabricated slabs may adopt a brick-concrete structure or other structural forms such as frame structures. Their characteristic is that the floor slabs are assembled from prefabricated components, resulting in many joints and relatively poor integrity. For example, brick-concrete structure houses built in the 1970s to 1990s often used prefabricated hollow floor slabs, which are prone to damage during earthquakes.

Changes in the Use of Prefabricated Slabs in Brick-Concrete Structure Houses

Older houses built before 2003 more commonly used prefabricated slabs, while cast-in-place floor slabs have become prevalent since then. Cast-in-place floor slabs involve concrete pouring on-site at the construction site, offering stronger integrity and better seismic performance. After 2008, the state revised building seismic codes, gradually phasing out prefabricated slabs and promoting cast-in-place floor slabs. This is because, with the development of construction technology and increased requirements for the seismic performance of houses, the advantages of cast-in-place floor slabs have become more apparent.

Precautions When Buying Second-Hand Houses

When buying a second-hand house, pay special attention to the fact that brick-concrete houses built before 2003 may use prefabricated slabs, which have relatively weak seismic performance. When purchasing such houses, it is essential to fully understand the structural form and construction year of the house. If necessary, hire a professional agency to conduct a house safety appraisal to ensure living safety.