12 earthquake disaster activities of the board how science lightning
Summary 5.12 Wenchuan earthquake disaster area to build in a lot of activities of the board. All activities of the board should be done well grounded metal body, and should be shared with other earth grounding. Should take appropriate measures in accordance with the number of thunderstorm lightning disaster around the structure and activities of the board. Over the activities of the board of the erection of air lightning conductor, lightning is undesirable. If transitional housing placement with double color plate and metal skeleton structure, in the case of doing a good overall grounding. Has been able to play the role of direct lightning protection
Keywords earthquake-stricken areas of science lightning activities of the board
5.12 devastating earthquake caused a large number of homeless people in disaster areas, the State Council attaches great importance to the structure of the country called for a helping hand for the affected people to build prefab house activities of the board is a simple lightweight steel its steel columns,Cheap Jordan Retro Shoes For Sale, steel roof trusses, steel purlins and other components of a meter or one meter square of common metal mesh. Roofing materials for the double color plate. This creates a very good 'Faraday cage' to each other has a good electrical connection. Activities of the board height is generally about three meters from the electrical safety considerations, all the activities of the board should be grounded metal body,03教育观察1, the ground should be shared with other grounding ground (such as duplicate ground), the grounding resistance should be the minimum OK. Several buildings and activities of the board should be a grounding connected to form a good grounding grid,140408 Q2猎头职位汇总借天涯视野寻访专业技能和中高管理岗, so as to ensure the safety of the affected people and the board room of electricity lightning protection according to China Aviation Industry Planning and Design Institute Group with the 'industrial and civil Distribution Design Handbook 'third edition provides meteorological data show that the number of thunderstorm days for the 346 Chengdu, Mianyang thunderstorm days for the 349 thunderstorm days Pingwu 30. Respectively: 17 Wenchuan, Maoxian 23, Lixian 31, Deyang, 29, 34 Mianzhu, Shifang 26, 34 in Dujiangyan, Pengzhou 29, Mianyang 31, County 32,2000电影史, North River 23, Green River 21, Pingwu 27, double 31. Which Mianyang, digital Pingwu more 'industrial and civil Distribution Design Manual' provided slightly lower. These figures show: earthquake disaster is not a minefield, but not strong minefields,New Retro Jordans Shoes 2014 Store, mined only belong to the minefield of thunderstorm days or less characterize different regions of the frequency of lightning activity. Refers to a region of the year the number of days of lightning discharges. More than once a day, whenever they hear thunder on a thunderstorm day. According to the degree of frequency of lightning activity and lightning damage, China's average annual number of thunderstorm days of the () is divided into four levels: the average annual thunderstorm days over 90 days for the strong mined areas; 4190 days of regional multi minefield: 2640 The days of mined areas; area not more than 25 days less minefield. Shows. In earthquake-stricken areas are mined or less minefield. Lower likelihood of lightning. If the number of thunderstorm days exaggerated. The disaster say strong minefield or a high incidence of lightning, lightning will cause wrong decisions, it is unscientific writer from China Meteorological informed. CMA policies and regulations Lightning Protection Committee and the Chinese Meteorological Society on May 30, 2008 held at the Bureau of Meteorology of the 'expert seminar earthquake-stricken areas of mine to work in Beijing,' to be experts: 'To understand thunderstorm days settlements , to consider the temporary houses and tent structures, to take appropriate measures to mine. '
activities of the board is a temporary building, but the security point of view, should be just as important as permanent buildings. Activities of the board of the mine shall be deemed permanent housing,Cheap Jordans, the need to consider all the negative factors, based on the maximum number of thunderstorm days long activities of the board and the board room to build sites that may arise, width, height, according to the current 'anti-Building mine design specifications '(GB 50057-94,2000 edition), Appendix building expected number of lightning strikes in a formula to calculate, usually do not need to set up lightning protection devices. In recent years, many new steel industrial plants,Cheap Jordan Retro Shoes For Sale,007系列电影介绍, are the use of metal roofing and metal roof trusses for air terminals (when the metal roofing meets 'Lightning design specifications' section 414 requirements), the use of steel columns for Lightning deflectors, the grounding of the use of reinforced or
separate artificial grounding. Most steel public buildings, sports buildings,Welcome to buy the cheap jordan shoes at discount price online sale. Many retro jordans for sale, airport terminals and other buildings, its columns, beams, floors, roofs are metal body, lightning protection devices are also building their own use of metal roofing, steel columns, foundation reinforcement. In recent years, some residential projects are all steel stairs, concrete residential buildings on both sides of the above, stair handrail, stair platforms, stair treads are welded metal body, proved that it is feasible to use these steel lightning current , part of the disaster area over the activities of the board resettlement area set up air line lightning, lightning, lightning protection measures, there are several problems with this: lightning conductor, lightning protection is limited, and some activities of the board within the scope of protection, and some protection outside the scope; lightning line or lightning rod from the activities of the board from the small metal; between lightning or lightning grounding line activities of the board and the fixed body and the other grounded metal body, at a distance smaller underground. These problems, it may cause a lightning counterattack resulted in houses damaged and cause a fire, causing casualties. Lightning could have been without a separate device is safe, and spend a lot of money but the addition of lightning protection devices being struck by lightning,1978年以后体育战线的三年调整1999, which is what we want to see the activities of the board if you want to install lightning protection devices, or 'earthquake-stricken area Lightning expert seminar in Beijing, 'the experts put it well:' If the transitional housing placement with double color plate,women air jordans is the your best choice, tent is a metal skeleton structure, in the case of good overall well-grounded measures to reduce direct lightning protection The relevant measures ', this is the move of science lightning.