2009年1月18日

燃燒他人,燃亮自已

或許你會奇怪,為什麼我會加上這句,在昨天的圖片分享中:
燃燒他人,燃亮自已
(http://petershek.blogspot.com/2009/01/blog-post_18.html)

看看下面的文章,便會明白

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Dubai's lightning risk soars with highrises

Dubai: With more and more tall structures coming up in Dubai, the chances of a lightning strike is increasing, according to a technical expert.

Sonjib Banerjee, technical director of Duval Messien, a French multinational specialised in Global Protection services, told Gulf News that it seems it is now mandatory to have lightning protection systems which are pro-active, intelligent, remotely monitored and maintenance-free for tall structures.

He said it is a myth that Dubai and the Gulf area are not vulnerable to lightning strikes. He referred to a lightning strike near Burj Dubai on November 26 and said it confirms the need for adequate lightning protection measures for all tall structures.

"The thunderstorm days in the UAE are about 10 per year. This means that, one lightning strike may happen per square kilometre per year in worst conditions, with a minimum of one lightning strike per 7 square kilometre per year," he said.

"A 100-metre-high building of 30 floors is five times more at risk in comparison to 50-metre-high building of 15 floors. This risk factor goes up, as the height of the building goes up," he said.

Banerjee said the probability of a lightning strike is calculated based on utility, type of construction and location of the structure.

Banerjee also said proper earthing is the only "safety valve" in the event of any electrical fault or lightning strike. The key challenge of the industry is to disseminate the latest knowledge in earthing science and to incorporate the latest technology in the country's safety regulations, he said.

"A survey reveals that 70 per cent of the residents in the UAE are at risk of being involved in electrical fires. Use of proper electrical accessories like three-pin plugs and sockets and branded circuit breakers are some precautionary measures against electrical fire hazards," he said.

Banerjee said the issue of electrical safety impacts the community, including the environment. The intelligent community needs to be more aware of each safety component, the options available and how electrical faults are dissipated.

He said all facilities that use electricity are at risk. The intensity of damage depends on the load capacity of each equipment. Faults can strike anywhere and cause an accident.

"We need to have safety measures inbuilt in the system to avert it. Inflammable materials catch fire faster, but they are part of our life at home or work. The consequential damages in both cases are huge," he said.

Safety standards

Standards of electrical safety of structures are defined in various international codes. Banerjee said the structures in Dubai need to follow these codes without compromise. The implication of such compromise may directly affect the safety of lives and assets. It also involves understanding the effect of the structures on the environment.

"In the entire concept of electrical safety system, buildings in Dubai like all parts of the world, must adhere to proven standards. Currently we believe there may be a need to re-evaluate some areas of concern, based on latest available technology and proven science," he said.

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再分享一張圖片:

由於杜拜塔與鄰近地區的高度差距太大,如科幻片的閃電效果,在現實中呈現

2009年1月17日

圖片分享:雷電擊中杜拜塔

你將會在下面看到的圖片,是於一月十五日拍攝的
雖然說來很無謂,但也要先說明:攝影師不是我,也不可能是我

為什麼沒可能呢?
因為照片裡的位置,是位置數千公里之遙的杜拜
而在照片內情況,則是雷電擊中了,正在施工中的世上最高建築物 - 杜拜塔

這次,絕對可以視為:在落成前的一次襲擊演習
以它的高度而言,襲擊來源一定不只是飛機,還有很多其他因素
加上,以它的結構而言,一旦發生倒塌事故,一定不如911般,垂直向下塌

或許,建築工程太過張揚,樹大招風,燃燒他人,燃亮自已


(http://www.burjdubaiskyscraper.com/)