What Is a Prefabricated Building?

1. A prefabricated building is one assembled on site from prefabricated parts and components. By the form of prefabricated elements and construction method, it falls into five types: block buildings, panel buildings, box-type buildings, frame-panel buildings, and lift-slab / lift-story buildings.

2. When walls, columns, beams, floors, roofs, and other parts of a building are prefabricated in a factory, shipped to the construction site, and fitted together like building blocks into a complete structure, that is called a "prefabricated building."

Advantages of prefabricated buildings

1. Better quality: Components can be mass-produced to standards, almost unaffected by weather, so quality is more reliable;

2. Energy saving and environmental protection: Less material waste during construction, and much less construction waste on site;

3. Shorter schedule: After components are produced, they are hauled to the site for assembly, cutting some processes and greatly speeding construction;

4. Less labor: Factory production of components reduces labor demand and lowers the physical intensity of on-site work;

5. Fewer formworks: Composite slabs serve as the bottom form for floors, and exterior hung panels serve as one-side formwork for shear walls, saving a large amount of formwork.

Disadvantages of prefabricated buildings

1. Higher cost: Project cost for prefabricated buildings is much higher than for traditional construction;

2. Higher freight: If the component plant is far from the site, transport cost rises;

3. Size limits: Due to production equipment limits, larger components are harder to manufacture;

4. Narrower application: Although the country is strongly promoting them, prefabricated buildings still face tight limits on overall building height and story height;

5. Weaker seismic performance: Integrity and stiffness are somewhat weaker, so resistance to seismic impact is poorer.

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