现代科技如何让摩天大楼更安全|体育外围买球投注

本文摘要:For 40 years, Los Angeles’ building code has required all buildings 75 feet and taller to have a rooftop emergency helicopter landing facility in a location approved by the fire chief. The idea in 1974, when the law was passed, was to make skyscrapers safer, in part as a reaction to a catastrophic fire in Brazil. But we know now there are better ways to make structures like the landmark U.S. Bank tower safe. I, for one, am cheering for the recently announced end of a policy requiring flat-topped buildings in Los Angeles. It’s a policy that holds lessons for tall buildings everywhere.40年来,洛杉矶的建筑条例仍然拒绝,所有75英尺以上的建筑,要在消防部门批准后的方位设置应急直升机迫降设施。

体育外围竞猜

NIST建议,所有高度多达420英尺的非居住于用摩天大楼,应当设置三个电梯间,且耐火材料应当需要忍受每平方英尺1,000磅的压力(再次发生炸弹攻击、煤气外泄或其他类似于事件时)。Allow some office workers to use elevators in an emergency.Conventionally, in an emergency situation, elevators in high-rise buildings are used by firefighters only. NIST recommends building elevators that can withstand fires and structural damage in the concrete core of a building.容许部分上班族在应急情况下用于电梯。

按照惯例,在应急情况下,高层建筑的电梯专供消防人员用于。NIST建议,建筑电梯不应需要忍受火灾和混凝土芯结构损毁。Mark stairwells and exits with glow-in-the-dark signs.As simple as it sounds, not every building has such markings, especially those built before the 2000s. New York was the first large city to require luminous markings in stairwells, five years after the 9/11 tragic events. More than 1,500 buildings now have the markings, but that’s still a small fraction of America’s tall buildings.用于黑暗中可闪烁的标志命令楼梯间与应急出口。

听得一起很非常简单,但并非所有建筑都有这样的标记,特别是在是在2000年之前修建的建筑。911事件的悲剧再次发生5年后,纽约市规定在楼梯间设置闪烁标识,纽约因此沦为第一个有类似于规定的大城市。目前,多达1,500栋建筑设置了类似于标志,但这在美国的高层建筑中仅有占到一小部分。If a city adopts these recommendations – and also asks tall buildings to include refuge floors, video-camera surveillance, and automatic sprinkler systems — the safety of the skyscrapers will increase significantly.如果一个城市使用了这些建议,并且拒绝高层建筑设置避难层、视频监控和自动灭火系统,摩天大楼的安全性将大幅提高。

Relaxing the requirements of a helipad also will empower architects to create more interesting rooftops. A space 50-by-50-feet wide at minimum is required for a helipad spot, plus a typical additional 25 feet around it as a buffer. This has resulted in a repetitive, boxy roof shape in the Los Angeles skyline.此外,限制对直升机停机坪的拒绝,也可以使建筑师们设计出更有意思的屋顶天台。直升机停机坪最少必须50×50英尺的空间,而且周围一般来说要成立25英尺的缓冲区。

这造成各种大同小异、四四方方的屋顶,占有了洛杉矶的天际线。Beyond aesthetics, boxy rooftops with helipads are really a missed opportunity to create “green” roofs with sustainable features. Now Los Angeles can do something like the spiral form in the rooftop of Shanghai Tower in Shanghai that captures rainwater. Some towers’ tops are now designated for wind turbines to harness wind energy, such as the Strata Tower in London.除了失礼美感外,另设直升机停机坪的四方屋顶,也错失了利用可持续功能创立“绿色”屋顶的机会。

体育外围竞猜

现在,洛杉矶的大楼也可以像上海的上海中心大厦(Shanghai Tower)一样,在屋顶设计可以搜集雨水的螺旋形结构。部分摩天大楼的屋顶设计了风力涡轮机,用来风力发电,例如伦敦的斯特拉塔(Strata Tower)。There’s nothing to fear – and much to gain – in relaxing the helipad requirement. I, for one, will be watching to see what inventive skyscrapers Angelinos come up with.对于限制摩天大楼楼顶直升机停机坪的规定,我们须担忧,恰恰相反,这将给我们带给许多益处。

洛杉矶人会设计出有哪些有创新的摩天大楼呢?我很期望。Kheir Al-Kodmany is a professor in the Department of Urban Planning and Policy at the University of Illinois at Chicago. He wrote this for Zocalo Public Square.本为作者海尔o阿尔孔德曼尼是伊利诺伊大学芝加哥分校(University of Illinois at Chicago)城市规划与政策系由教授。

本文原刊出于信息交流网站Zocalo Public Square。

本文关键词:体育外围,体育外围竞猜,体育外围买球投注

本文来源:体育外围-www.zqzhongbang.com