Basic features of windows and doors: wind pressure resistances
Constructions are shelters of human’s survival. Due to varied differences of building locations, height and installation of windows and doors, wind pressure that applied on will be also varied. The interaction of positive and negative wind pressure may cause windows and doors damage and breakdown. It may also cause life dangers because of falling apart. Therefore, wind pressure is a core and basic issue of causing shape changing, damage, leaks of wind, sand and rains.
Wind has a complex impacts on constructions due to floating air. Winter and summer are typhoon seasons. Typhoon attacks cause millions of damages to a city. During the attack, windows are bended and broken down under strong wind pressure.The stronger wind float, the higher pressure will be on glass. The damage of windows may also cause lost in properties and life dangers.
Wind pressure resistances is important to windows and doors.
Wind pressure resistance is an ability of a window that the shape and function remain the same under strong wind pressure while closing.
It is one of the competitively important basic physical standards and security rules.
The calculation of wind pressure should take the height into account. Higher floors will have stronger wind pressure. At the same time, wind pressure also have different effect on construction with different shapes. Constructions with sharpen angles will have more air friction then that cause higher wind pressure. Streamline shape constructions have less air frictions and wind pressure. Locations also cause different in basic wind pressure, such as wind pressure in plain and hills are different from coast and inland.
China has a set of nine level wind pressure resistances standards (GB50009-2001 2006 Version) on constructions windows. The high level, the better performances it will be. Wind pressure resistances are different from national typhoon levels (GB/T 19201-2006).Usually, level 9 of wind pressure resistances can easily stand level 12 of typhoon. Therefore,choosing relatively high level of wind pressure resistances products are recommended. If the floors are high-rise and locations are wind catching, it will be much better to choose wind pressure resistance above level 5.
Off-test wind pressure resistances may cause deform shapes and glass break-down under strong wind pressure. The facilities and technologies standards determine the quality of products. Some unknown manufactures are using non-quality assurance metal spare parts that have problems of rusting,breakage and so on. Locks are undurable and having security issues to users. Branding products like Xingfa ,as a professional aluminium window profile factory,are using quality assurances metal spare parts that are durable, anti-rusting and solid for long term use.
Xingfa Aluminium, established in 1984, is the leading aluminium profile supplier in China. Xingfa Aluminium has been persisting on the approaches of combining independent research&development and cooperation with domestic and overseas scientific research institutes. Relying on our own four national and five provincial R&D platforms, Xingfa always keeps close cooperation of industry, university and research to provide strong guarantee for the improvement of the company's technology research and development capability, thus forming self-owned core competence.