Prefabricated House - 5 Floors

It is feasible to build a prefabricated house with 5 floors, but multiple factors need to be considered comprehensively.

Building Types and Applicability

Prefabricated cement houses can be constructed with 1 - 5 floors. They are quick to install and durable, featuring a load-bearing capacity of 400 kg/m², a wall deformation coefficient of ≤ 129 kg/㎡, and a roof load-bearing capacity of ≥ 49 kg/㎡. Their service life can reach up to 79 years. Block buildings within prefabricated construction are also suitable for low-rise houses with 3 - 5 floors. These houses can be manufactured in factories and then transported to the site for fixation, followed by furniture arrangement. This indicates that from the perspective of building types and design, prefabricated houses have the capability to be built with 5 floors.

Factors Affecting Service Life

The designed service life of a five-story prefabricated slab building is usually 50 years, which is a theoretical value based on comprehensive considerations of building structural safety, durability, and maintenance costs. However, the actual service life is influenced by multiple factors. In terms of material quality, high-quality reinforced concrete prefabricated slabs can last for more than 30 years, while low-quality ones may only last for about 10 years. Construction quality defects can shorten the service life. A harsh usage environment can also have a negative impact on the building's lifespan. Regular maintenance, on the other hand, can extend its service life. In addition, due to the relatively high floors of five-story prefabricated slab buildings, the prefabricated panels are subject to greater stress, posing significant safety hazards. The load-bearing capacity of the hollow prefabricated components in the middle may be difficult to meet the design requirements, and these buildings face greater structural stress compared to low-rise prefabricated slab buildings, resulting in a potentially shorter service life.

Demolition Policy Situation

The Ministry of Housing and Urban-Rural Development has not issued a unified document stipulating the blanket demolition of prefabricated slab buildings with 5 floors or less. The demolition policy is based on a comprehensive consideration of multiple factors. Prefabricated slab houses that meet the criteria for dangerous buildings or are located in urban core areas and comply with urban village renovation or urban planning requirements may be demolished. Moreover, it is not a comprehensive demolition but a classified approach. The government will provide reasonable compensation and resettlement measures for prefabricated slab buildings that need to be demolished.