Prefabricated Housing in Disaster Areas

The application of prefabricated housing in disaster-stricken areas offers advantages but also poses structural safety risks, necessitating scientific planning and strict supervision.

Advantages of Prefabricated Housing in Post-Disaster Reconstruction

The use of prefabricated housing in disaster-stricken areas presents significant advantages. Taking the wildfire crisis in the United States as an example, in January 2025, the Eaton and Palisades wildfires erupted in the Los Angeles area, destroying a large number of buildings. The cityLAB team at the University of California, Los Angeles (UCLA) promoted prefabricated housing in post-disaster reconstruction and released the "Altadena Prefabricated Housing Manual" to provide reconstruction plans for affected residents. The core advantages of prefabricated housing lie in its fast construction speed, low cost, and controllable quality. Manufactured in factories using standardized processes and quickly assembled on-site, it can significantly shorten the housing reconstruction cycle after disasters, helping affected residents resume normal lives as soon as possible. Additionally, the cost of prefabricated housing is lower than that of traditional buildings, helping to alleviate the housing affordability crisis, especially in resource-constrained post-disaster environments.

Structural Safety Risks of Prefabricated Panel Houses

However, the structural safety performance of prefabricated panel houses cannot be overlooked. For instance, on April 11, a prefabricated panel fracture incident occurred in Fengshou Community, Guanba Town, Zhong County, resulting in 2 deaths and 3 injuries. The direct cause was excessive temporary stacking of loads on the second-floor slab, exceeding the bearing capacity of the prefabricated panel and leading to brittle fracture and collapse. This incident exposed three major safety hazards of prefabricated panel houses: First, their earthquake resistance is weak, with uneven quality of cement panels prone to structural damage during natural disasters such as earthquakes. Second, their durability is insufficient, prone to issues like water leakage and cracking, with a service life of only about 40 years, far below modern building standards. Third, the strength of materials and structures is inadequate, making it difficult to withstand complex geological conditions such as natural subsidence and earthquakes.

The Necessity of Scientific Planning and Strict Supervision

To balance the efficiency and safety of prefabricated housing, management must be strengthened in design, production, and construction. During the design phase, load standards and earthquake resistance requirements should be fully considered to avoid overloading. In the production process, the quality of cement panels must be strictly controlled to ensure material strength meets specifications. During construction, operational procedures should be standardized to avoid violations such as temporary stacking. Only through scientific planning and strict supervision can the advantages of prefabricated housing in post-disaster reconstruction be fully realized while ensuring the safety of residents' lives and property.