In the design and construction of multi-storey steel building, metal sandwich panels, as a high-quality building material, are favored for their light weight, high strength, thermal insulation, fire resistance, sound insulation and other characteristics. Correct selection and application of metal sandwich panel can not only improve the overall performance of the building, but also effectively reduce construction costs and improve construction efficiency. This article will discuss how to choose metal sandwich panel for multi-storey steel buildings from the aspects of types, performance, selection principles and specific applications of metal sandwich panel.
1. Types and performance of metal sandwich panel
Metal sandwich panels are mainly composed of three parts: metal panels, core materials and glue. Depending on the core material, common metal sandwich panel include polystyrene sandwich panels (EPS), rigid polyurethane sandwich panels (PU), rock wool sandwich panels (RW/SW), etc.
Polystyrene sandwich panels (EPS): have the advantages of thermal insulation, water insulation, convenient construction, low price, etc., but low strength, not resistant to high temperature, easy to produce toxic gases when exposed to fire, and relatively short service life.
Rigid polyurethane sandwich panel (PU): non-conductive, good thermal insulation, high strength, waterproof, airtight, and with a service life of up to 25 years. Although it will extinguish itself when away from the fire, it still needs to be used with caution in areas with high fire protection requirements.
Rock wool sandwich panel (RW/SW): high strength, corrosion resistance, sound absorption, fire resistance, and excellent thermal insulation performance, but it is easy to absorb moisture, and has poor bonding performance with metal, and the price is relatively high.
2. Principles for selecting metal sandwich panels
Understand the building needs: Before selecting metal sandwich panel, it is necessary to clarify the specific needs of the building, such as thermal insulation requirements, fire protection level, waterproof performance, load-bearing capacity, etc. Buildings with different uses have different performance requirements for sandwich panels.
Consider the characteristics of the core material: Choose the appropriate core material according to the building needs. For example, for buildings with high fire protection requirements, rock wool sandwich panels can be selected; for buildings with high thermal insulation requirements, rigid polyurethane sandwich panels are a good choice.
Pay attention to the quality of sandwich panels: Qualified metal sandwich panel should has excellent performance indicators, such as low thermal conductivity, low water absorption, high strength and fire rating. At the same time, products with product quality certificates and fire rating certificates should be selected to ensure reliable product quality.
Consider construction and maintenance: The convenience of construction and later maintenance costs of metal sandwich panels are also factors that need to be considered when choosing. Sandwich panels that are easy to install and have low maintenance costs should be selected to improve construction efficiency and reduce maintenance costs.
3. Specific application of metal sandwich panels in multi-story steel building
In multi-storey steel buildings, metal sandwich panels are mainly used in walls, roofs and other parts.
Wall application: As a wall material, metal sandwich panel can not only provide good thermal insulation effects, but also effectively resist wind pressure and earthquake effects. When selecting, the appropriate sandwich panel thickness and strength grade should be selected according to the height, span and force conditions of the wall. At the same time, attention should also be paid to the waterproof, fireproof and other performance requirements of the wall.
Roof application: As a roofing material, metal sandwich panel need to have good waterproof, thermal insulation and load-bearing capacity. When selecting, sandwich panels with excellent waterproof performance should be selected, and the drainage system of the roof should be reasonably designed. At the same time, the wind pressure resistance and earthquake resistance of the roof should also be considered to ensure the safety and stability of the roof structure.
4. Conclusion
As one of the important materials for multi-storey steel building, the selection and application of metal sandwich panels are directly related to the overall performance and construction efficiency of the building. When selecting, it is necessary to fully understand factors such as building needs, core material characteristics and the quality of sandwich panels, and combine them with the convenience of construction and maintenance for comprehensive consideration. Through the scientific and reasonable selection and application of metal sandwich panel, the overall performance and economic benefits of multi-story steel buildings can be significantly improved.
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