Prefabricated Panel Houses in Nanjing

Under normal use and with good maintenance, prefabricated panel houses in Nanjing generally do not pose direct dangers, but there are some issues that require attention.

House Safety Rating Situation

According to the data from the nationwide inspection and archiving of prefabricated panel residential buildings completed by the housing and construction department in early 2026, after classifying the prefabricated panel houses in Nanjing according to the "Standard for Dangerous Building Appraisal" (JGJ 125 - 2016), 72% of the buildings were rated as Class A and Class B. Among them, Class A buildings have a structural load-bearing capacity that meets normal use requirements with no dangerous points; Class B buildings have issues with individual components but these do not affect the main structure. Class C buildings account for 25%, and in these houses, some load-bearing structures do not meet the standards, posing local dangers. Less than 4% are Class D buildings, where the load-bearing structures have completely failed, and the entire building could collapse at any time. However, only about 72,000 households across the country truly need to be demolished and rebuilt, which means that most prefabricated panel houses in Nanjing do not require demolition.

Issues Related to the House's Own Characteristics

Prefabricated panel houses have problems such as poor sound insulation, poor thermal insulation, and poor waterproofing. This is because they were originally designed for rapid construction to address housing shortages in the 1980s and 1990s, and safety appraisals do not cover these aspects.

Seismic Performance Situation

Nanjing is located in an area with relatively low seismic activity. However, the seismic performance of prefabricated panel houses depends on the overall structural design and construction quality, and their inherent seismic performance is relatively weak. They rely on the overall structural stability and the firmness of connection joints to enhance their seismic capacity. Regular maintenance and inspections to ensure the firmness of structural connection joints and the timely detection and repair of potential safety hazards can improve seismic performance.

Safety Recommendations

For the safety of prefabricated panel houses in Nanjing, it is recommended to consult a professional structural engineer for an assessment to understand the specific structural conditions and potential risks. Based on the assessment results, reinforcement measures may be required to improve seismic performance and overall stability. In daily use, avoid arbitrarily modifying the house structure or adding excessive loads to prevent affecting house safety.