Construction Crane Question

[Pavel314]

There's a construction project going on next to my office. They recently used a big yellow moveable crane to construct a fixed tower crane, picture at

What's the advantage of the fixed tower crane over the moveable one? I suppose it's because it can lift and lower things anywhere in the site without needing wide open spaces to get close enough, but thought someone here may have a better answer.

Paul

[Don Phillipson]

Better power to weight ratio seems the chief benefit, and might mean lower operating costs as well.

[Arthur Conan Doyle]

The reach, load rating and the fact that most tower cranes can build themselves up much higher than a mobile crane.