How tall is 800 meters

I challenge anyone out there to say there is a better skyline from all four directions. Dubai Marina alone has over skyscrapers between 20, 40 and 80 floors… Dubai is the biggest construction site in the world right now. I think your comment is rather misplaced… ha ha ha! The tower mentioned in this thread is only one of 3 announced super tall buildings! And with this, Dubai hikes to rank 1 in my favorite destinations list. Way better. And two mini towers, attached by sky bridges, will flank the building's base, further improving its stability.

You'd imagine that the logistics and know-how needed to build this monolith would be enormous. They are, says Ron Klemencic, president of Magnusson Klemencic Associates, an engineering firm specialising in high-rise constructions.

But such structures are now relatively easy to erect. Stronger concrete and steel and advances in designing building frames, he says, allow for the safe development of mega-skyscrapers. The current record-holder as tallest man-made structure is still a construction site.

The spire will be visible from 95km 60 miles away — and the views will naturally be stunning. The quantity of materials involved in the building's construction is mind-boggling. For example, the 31, tons of steel rods used to reinforce the structure would, if laid end to end, stretch one-quarter of the way round the world. When the tower is finished, , cubic metres of concrete will have been used.

It will weigh about , tons. When structures are so tall, it isn't just materials you have to worry about; it's the tools needed to build them. The tower cranes used to build conventional high-rise buildings, which are fixed to the ground, can carry enormous weight — but for mega-skyscrapers, helicopters are needed to lift materials to the higher levels. Numerous high-profile skyscrapers are now being built around the world, including New York's Freedom Tower on the World Trade Centre site.

But none will exceed m in height. The building set to replace Southwark Towers in London — the Shard London Bridge also known as the "shard of glass" — will be a comparatively puny m tall and have 72 floors. When it is completed estimates say in it will be Britain's tallest building. Several other high-rises are proposed for the capital. But the Mayor of London, Boris Johnson, is critical of tall buildings and has vowed to strengthen regulations protecting views of historic buildings such as St Paul's Cathedral and the Palace of Westminster.

Out on the track, you would never have known they were so inexperienced. Mu took the lead after the break, and held it right through to the finish. She said she was not only front-running but wanted to put herself in the best position to respond to what other athletes were doing. She said the record time meant even more to her than the medal. Holmes had been in touch with her in the past few weeks. Before she left the United States to compete in the Olympics, Athing Mu spied a hair barrette in a department store.

The accessory and the word inscribed on it, she said, were perfect for her planned appearance in the meter final. Just as she did in the U. Sifan Hassan of the Netherlands is attempting to become the first athlete to win the 1,, 5, and 10,meter events in the same Olympic Games. Mu finished in 1 minute In winning the gold medal, Mu matched a feat last achieved for the U.

She qualified for the Games in the in a world-leading