Wikipedia är som vanligt en bra plats att vända sig till. Observera särskilt att det nedan talas om
tower cranes, tornkranar, och inte
cranes, lyftkranar, i allmänhet. De mobila kranar vi alla kan se från dag till annan räknas alltså inte in bland dessa tänkta 100 000 kranar varav en varierande andel påstås finnas i Dubai.
CraneIt is often claimed that a large fraction of the
tower cranes in the world are in use in Dubai. The exact percentage remains an open question.
Debunking DubaiAccording to local newspapers, construction firms and even ENR's recent cover story on Dubai, the desert city is home to 15 to 25% of the world's total, estimated at 100,000 or more. That sounds impressive and especially fitting for Dubai, which is fast becoming the Miami of the Middle East.
But is so many possible? Some crane experts don't think so.
"It seems too much," says Wolfgang Reim, who is in charge of sales for Germany-based Liebherr Group's tower crane business. He says no one really knows for sure how many tower cranes are operating around the world, much less in Dubai.
But he has some ideas. Liebherr's research puts the number of tower cranes in Dubai at somewhere between 1,800 and 2,000—only 1-2% of the world's population. In contrast, the number of new tower cranes sold across the world annually is about 4,300, excluding cranes built in China and Italy, which drive the number closer to 10,000.
To say that Dubai has 25% of the world's tower cranes is to conclude that it is home to 25,000 or more units, which Reim says is impossible considering it buys only a few dozen new units each year. "
This is all good marketing," he says, adding that Dubai probably has the most cranes per capita of any other region.