How do buildings go up so fast....

One thing that seems to have changed a lot since I was a child is the speed that new building can be erected. These days its seems like a new retail park or set of office buildings can literally just spring up from a pile of wasteland!

Of course it still takes a lot of work but building contractors make use of awesome new technology and pre fabricated parts such as steel buildings to build sturdy, strong and affordable structures that can be used for almost any application.

This buildings used to look awful but they have also been given great new design touches now and some look really really nice.

What do you think?