Prefabricated Factory Building Roof Truss
Common types of prefabricated factory building roof trusses include prestressed concrete broken-line, arch, and trapezoidal trusses, which should be selected based on the scenario, performance, and specification requirements.
Prestressed Concrete Broken-Line Roof Truss
Performance Characteristics: It has strong load-bearing capacity, high rigidity, excellent crack resistance, with a compressive strength of up to 100MPa. It has a fire rating of A1, a fire resistance limit of over 2 hours, and a safety rating of Level II. Its structural stability is good, making it suitable for bearing large loads.
Applicable Scenarios: Single-story or multi-story industrial factories, warehouses, chemical factories, etc., especially suitable for places that require hanging cranes or have large roof loads.
Specification Selection: The span ranges from 15 to 30 meters, with common specifications including 15m, 18m, 21m, 24m, 27m, and 30m. The selection should be comprehensively determined based on the building span, skylight settings, and crane tonnage.
Custom Services: Companies such as Jiangxi Luheng Special Concrete Products Co., Ltd. can provide custom services for specifications ranging from 18 to 30 meters, supporting the design of matching components such as gutter plates.
Prestressed Concrete Arch Roof Truss
Performance Characteristics: It mainly bears axial pressure, has high material utilization, and is lightweight. However, its production and construction are complex, and the roof slope varies greatly, requiring precise control of the construction process.
Applicable Scenarios: Large-span public buildings (such as stadiums and exhibition halls) and industrial factories with special appearance requirements, suitable for scenarios that pursue spaciousness and aesthetic appearance.
Specification Selection: The span can reach over 30 meters, with some cases even exceeding 60 meters. Customization is required based on the building's function and aesthetic needs.
Prestressed Concrete Trapezoidal Roof Truss
Performance Characteristics: The roof slope is gentle, facilitating construction and waterproofing treatment. However, its load-bearing performance and economy are slightly inferior to those of the broken-line truss, requiring a balance between cost and practicality.
Applicable Scenarios: Buildings with strict requirements for roof slope or scenarios that require combination with skylight frames, such as the lighting design of some industrial factories.
Specification Selection: The span ranges from 18 to 30 meters, and the selection should be made in combination with the roof drainage requirements and structural stability.
Procurement Considerations
- Clear Parameters: Key parameters such as load rating (e.g., wind load standard value of 0.45kN/m²) and connection method (welding or bolting) should be determined to ensure that the roof truss matches the building structure.
- Enterprise Services: Some companies (such as Shandong Keneng New Building Materials and Shenyang Youyi Components) offer services such as compensation for shortages and damages, and support customization as needed, which can reduce procurement risks.
- Price Reference: Steel roof trusses cost about 4800 yuan per ton, while concrete roof trusses cost about 98-200 yuan per square meter. The specific price varies depending on the material, specifications, and process differences, so it is necessary to compare prices from multiple sources.
