Prefabricated Panel Integral House

A prefabricated panel integral house is a type of building constructed primarily using prefabricated panels, characterized by specific structural features, construction history, advantages and disadvantages, as well as renovation policies.

Structure and Types: Prefabricated panels are cement components manufactured in factories. They are created by nailing wooden models, arranging steel bars, and pouring cement. These panels come in two types: solid and hollow. The hollow structure reduces the amount of non-load-bearing concrete, achieving lightweighting while maintaining load-bearing capacity and reducing material consumption.

Construction History: This building form originated in the early 20th century, and many residential buildings constructed in China before 1985 adopted this structure. The construction method involves preparing the foundation in advance. After the prefabricated panels are transported to the site, they are assembled piece by piece using cranes. This approach allows for rapid construction, with a small team able to complete assembly in just a few hours, significantly shortening the construction cycle.

Advantages and Disadvantages:

• Advantages: High construction efficiency and relatively low costs make it suitable for rapid construction needs.
• Disadvantages: Existing prefabricated panel houses generally suffer from weak earthquake resistance, poor sound and thermal insulation, and a lifespan of about 30-50 years, which is much shorter than that of cast-in-place concrete and prefabricated buildings. With advancements in construction technology, cast-in-place concrete and prefabricated buildings are gradually replacing traditional prefabricated panel houses. Prefabricated buildings use modular factory-prefabricated components, such as CMC composite modular buildings, which enhance earthquake resistance through integrated steel-concrete pouring. Their construction period is 30% shorter than traditional methods, and they offer better overall performance.

Renovation Policies: Since 2022, China has implemented renovation policies focusing on repairing and upgrading prefabricated panel houses, with demolition limited to buildings that meet hazardous building standards. Renovations may include structural reinforcement and improvements to sound and thermal insulation to extend the lifespan of the houses and enhance living safety.

Development Trends: With progress in construction technology, prefabricated panel houses are gradually being replaced by cast-in-place concrete and prefabricated buildings. However, existing houses still require reasonable renovation guided by policies to meet modern living needs.