What is Prefabricated Housing

Prefabricated housing is a form of construction where building components are industrially produced and assembled on-site. It is also known as modular construction, involving the disassembly of buildings into independent modules that are manufactured in factories and then transported to the site for assembly.

I. Core Characteristics
The core of prefabricated housing lies in the combination of "industrial prefabrication" and "on-site assembly." Its construction process is divided into two stages:

1. Factory Prefabrication Stage: Components such as ceilings, floors, walls, and plumbing and electrical systems are produced on factory assembly lines. For example, prefabricated concrete components are molded using computer-controlled molds, with dimensional tolerances for each wall panel controlled to the millimeter level; steel structure modules employ standardized welding processes to ensure structural strength.
2. On-site Assembly Stage: After being transported to the construction site, prefabricated components are assembled into a complete building through methods such as bolting, welding, or grouting. This process is similar to "building with blocks," but it strictly adheres to design drawings and construction specifications to ensure structural stability.

II. Advantages Compared to Traditional Construction

1. Significantly Shorter Construction Time: Taking a 150-square-meter, three-story rural residence as an example, the main structure of a prefabricated house can be completed in 5 days, with fine decoration delivered within 2 months; whereas traditional brick-and-mortar structures require at least 6-8 months. Factory prefabrication and on-site construction proceed simultaneously, greatly reducing the total construction time.
2. High Quality Control: The factory environment avoids the impact of weather and manual operation errors, resulting in more stable component quality. For example, indicators such as the strength of prefabricated concrete components and the thickness of steel reinforcement cover can be precisely controlled through automated equipment; corrosion protection and welding quality of steel structure modules are superior to on-site operations.
3. Outstanding Energy-Saving and Environmental Benefits: Factory prefabrication reduces on-site wet operations (such as concrete pouring), lowering dust and noise pollution; component production can optimize material usage, reducing construction waste. Additionally, some prefabricated houses adopt integrated insulation walls, improving building energy efficiency.
4. Superior Seismic Performance: Regular prefabricated concrete or steel structure houses, through integral connection designs (such as cast-in-place nodes and high-strength bolt connections), can achieve a seismic fortification intensity of up to eight degrees. The seismic performance of steel structure prefabricated houses is more than 50% higher than that of brick-and-mortar structures, making them more suitable for earthquake-prone areas.

III. Limitations
Prefabricated housing places extremely high demands on industrial infrastructure, requiring a complete technical system (such as modular design software), production system (such as automated assembly lines), and industrial clusters (such as component transportation and on-site installation support services) for support. Without these conditions, costs may rise or quality risks may occur.