Application of Sprayed coated Aluminum Plate and Roller Coated Aluminum Plate in Building Curtain Wall
The single-layer aluminum sheet for curtain wall is made of pure aluminum series (1100,1060), Al-Mn alloy (3003) and Al-Mg alloy (5052,5754, etc.)
The thickness and the alloy of the spray coated aluminum plate can be selected according to the design requirements, without the process limit. The thickness of Roller coated aluminum plate is not more than 2.5mm.
Here’s the rigidity comparison of 3mm 3003 spray coated aluminum plate and 2.5mm 5754 roller coated aluminum plate.
In the curtain wall structure, the rigidity of the aluminum plate is very important, because in the curtain wall structure of the destruction of aluminum is not broken, but whether the aluminum plate has enough rigidity is lower than the deformation of the external load, the rigidity of the aluminum plate depends on the thickness of the aluminum plate and the structure of the rib
The stiffness coefficient (D) is calculated
D = Et³ / 12 (1-0.33²), t is the thickness, E is the elastic modulus
D3003 / D5754 = 1.75
The rigidity of 3mm thickness 3003 is 1.75 times than the 2.5mm 5754 , from the elastic modulus E value can be seen, equal thickness of 3003 slightly better than 5754 rigidity,
Therefore, many projects, especially high-rise structure and high pressure area select the 3mm spray coated aluminum plate(3003), such as Shanghai Center Square (170 meters high), Dalian Yunshan Building (210 meters high), Shenzhen Airport. In foreign countries more use of pure aluminum, the thickness of 3mm-4mm, roller coated aluminum plate for low pressure conditions, such as the underlying building.