Specifications and Models of Prefabricated House Roof Panels
The specifications and models of prefabricated house roof panels are diverse, covering aspects such as dimensions, load-bearing capacity, and specific models.
Dimensions: In terms of length, the longest for residential use is 4.2 meters, typically increasing in increments of 300mm, such as 3000, 3300, 3600, 3900, and 4200 millimeters. The length of roof panels for rural house construction is also approximately 4200 millimeters. The width is primarily 500mm and 600mm, with some designs featuring four holes at 400mm and five holes at 500mm. The width range for rural house construction roof panels is 490-600 millimeters. Common thicknesses are 120mm and 150mm, while rural house construction roof panels have a thickness range of 80-120 millimeters. Dimension selection should be determined based on a combination of building span, load requirements, and construction conditions.
Load-Bearing Capacity: Residential buildings commonly use Grade 1 and Grade 2 panels. Grade 1 panels can withstand a live load of 1kN/m² and are suitable for areas with smaller loads; Grade 2 panels can withstand 2kN/m² and are used for ordinary residential floors. In the southwest region, the minimum requirement is Grade 4 panels, with a load-bearing capacity of 4kN/m² to adapt to special geological or climatic conditions. According to the 'Beijing Technical Regulations for Prefabricated Building Components,' prefabricated panels are classified into three grades based on load-bearing capacity: light-duty prefabricated panels (≤150kg/m²), medium-duty prefabricated panels (150-250kg/m²), and heavy-duty prefabricated panels (≥250kg/m²). These correspond to different usage scenarios, such as light-duty panels for partition walls and heavy-duty panels for industrial buildings or impact-resistant areas.
Specific Model Examples: Solid panels, such as 2400×1200×100mm, are suitable for small-span areas (e.g., bathroom and kitchen floors); hollow panels, such as 3000×600×150mm, reduce self-weight through a hollow design in the middle and are commonly used as ordinary residential floor panels; shaped panels, such as 4500×900×180mm, are customized for special house layouts (e.g., balcony cantilever panels and stair treads). Additionally, medium-duty hollow panels measuring 2000×1200×160mm in residential floors balance load-bearing capacity and cost-effectiveness; industrial buildings use heavy-duty solid panels measuring 3000×1500×200mm to enhance impact resistance; bridge prefabricated panels in municipal engineering often use prestressed panels measuring 5000×800×250mm to increase span capacity through prestressing technology. Model selection should be comprehensively evaluated based on building function, load requirements, and construction specifications.
