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Storm-proof and energy-efficient construction

Typhoon-proof façades and windows using high‑performance insulating profiles

The requirements imposed on new buildings in China’s cities are stringent. Whether a private home or a skyscraper, all buildings not only have to comply with ecological and energy efficiency standards, their design must also be aesthetically in keeping. But first and foremost, they have to be capable of withstanding locally occurring natural phenomena. Due to their regional geology and climatic location, wide areas of China are vulnerable to both earthquakes and typhoons. Earthquake-proof construction has already been practised for many years using special steel designs. To be safe against the ravages of tropical typhoons, storm-proofed windows and glass façades are vital. This is where aluminium windows have a major role to play: Their outer and inner shell with insulating profiles provide energy-efficient insulation and create a positive-locking assembly.

Superb energy efficiency and wind stability

The functionality, design versatility and material strength of aluminium make windows, glass walls and doors with aluminium frames a highly popular choice with architects. Using coordinated design elements, they support open floor plans and offer an aesthetically pleasing way to link inside and outside spaces. If aluminium frames are assembled and insulated using special insulating profiles such as insulbar® profiles made of engineering high-performance plastic produced by the German inventor and manufacturer Ensinger, they will comply with the strictest energy efficiency and stability requirements of any regional climate zone.

The insulating profiles increase the window’s thermal insulation value, maintain the required room temperature and minimize energy losses over the window’s entire service life. They also help to ensure that glass façades and windows are capable of withstanding even tropical cyclones as a result of their optimized assembly.

Certified safety in compliance with Chinese standards

Under typhoon conditions, windows and façades are exposed to double their normal stress levels. Wind and rain often act on them simultaneously. Storm and wind pressures of this type are frequently underestimated. Deflection combined with driving rain can create forces which result in building damage. Consequently, resistance capacity under the effects of wind is an established part of system testing. This ensures that in the event of a storm, the maximum permitted degree of deflection in windows and façades is not exceeded, the glass does not break and there is no movement of the individual elements within the glass and frame assembly.

This is how window manufacturers in China should have their window and façade systems tested at the Shanghai Research Institute of Building Science Group for wind and typhoon resistance. This type of wind pressure testing subjects the test specimen under the pressure of various performance grading indicators. The test is then completed by checking the relative strength of the main force profiles as to whether they meet the requirements. Then a number of different grades are assigned. For grades 1–9, the wind pressure resistance of doors and windows is tested. The higher the grade, the stronger the wind pressure resistance of the glass and frame.

Grade when testing the storm resistance of window systems: The higher the grade, the stronger the wind pressure resistance of doors and windows

Summary:

Aluminium window systems / window assemblies which are thermally separated by an insulating profile such as insulbar are capable of achieving the highest wind pressure resistance levels. The Shanghai Research Institute of Building Science Group uses wind pressure tests to determine how well window systems and facades are able to withstand storms.

Picture credits: Ensinger GmbH & Ensinger China Co.,Ltd.

Ensinger is exhibiting:

Glasstec
23. – 26. October 2018
Düsseldorf, Germany

VETECO
13.-16. November 2018
Madrid, Spain

BAU
14.-19. January 2018
Munich, Germany

Climate zones in China
Source: China Meteorological Administration

Façades and windows insulated with insulbar® in the Hongqiao Lingkong Garden in Shanghai, China. This region can also experience weather events such as storms.

China has different wind zones which are illustrated in the diagram. More detailed information is available in the standard GB50009-2012.
Source: National Building Structure Load Specification 2012

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