What Does Prefabricated Floor Slab of House Mean

A prefabricated floor slab of a house is a type of floor slab constructed using pre-made concrete components (such as floor slabs) that are manufactured in a factory and then transported to the site for installation.

Types of Prefabricated Floor Slabs

Prefabricated floor slabs mainly come in two types: solid slabs and hollow slabs. Solid slabs have a simple structure and strong load-bearing capacity, but they are relatively heavy. Hollow slabs reduce their self-weight through internal hollow designs, saving materials while maintaining a certain load-bearing capacity, making them more widely used.

Characteristics of Prefabricated Floor Slabs

1. Advanced Technology: Factory production utilizes standardized molds and automated equipment, ensuring precise component dimensions, smooth surfaces, and far superior quality stability compared to on-site pouring.
2. Time-Saving: Component production is carried out simultaneously with on-site foundation construction. During installation, only positioning and connection are required, shortening the construction period by 30%-50%.
3. Lower Cost: Centralized factory production reduces the use of formwork, labor costs, and material waste, resulting in a comprehensive cost reduction of approximately 15%-20% compared to cast-in-place structures.
4. Quality Control: Components are cured in a constant temperature and humidity environment, achieving higher strength compliance rates. Strict inspection procedures are also implemented to avoid quality fluctuations during on-site construction.
5. Environmental Benefits: Factory production reduces on-site dust and noise pollution, and material utilization is high, meeting green building standards.
6. Enhanced Safety: Component production avoids the risks of high-altitude operations, and the installation process is highly mechanized, reducing the probability of safety accidents.
7. Design Flexibility: Customized irregular components and pre-reserved pipeline holes can be produced, supporting complex architectural form designs and meeting personalized needs.

Defects of Prefabricated Floor Slabs

1. Poor Integrity: Components are connected through nodes, resulting in overall stiffness that is weaker than that of cast-in-place structures and prone to cracking.
2. Insufficient Earthquake Resistance: The connection strength at nodes is limited, making them prone to separation under earthquake action. The earthquake resistance level is generally lower than that of cast-in-place structures.
3. Limited Lifespan: The design lifespan of prefabricated slab houses is generally 30-40 years. After this period, structural aging and connector corrosion may occur, requiring reinforcement or demolition.

Application Scenarios

Prefabricated floor slabs are suitable for multi-story residential buildings, schools, hospitals, and other projects sensitive to construction periods and costs. However, they should be used with caution in high-intensity earthquake zones or super high-rise buildings. With technological advancements, new types of prefabricated components (such as prestressed hollow slabs) are gradually improving earthquake resistance and expanding their application scope.