Grove telescopic tower crane erecting wind mill in Germany.

First the outriggers are lifted into place:



Next the hook block is 'reeved.'

Now the superstructure is raised, using a second mobile crane:

...and now it's been finally lowered into place:

Up goes the mast, with a little bit of help from some hefty hydraulic rams:

...and locks into the vertical - looks like they've buried the outriggers too!

Next the pendant supports are lifted into place

Now the crane's mast is telescoped upwards, stretching the 'guy-ropes'

With the pendants tensioned the crane is now finally ready to go to work!

The contract was completed with five lifts, the first three being the tower mast sections that weighed 62 tonnes, 53 tonnes and 45 tonnes respectively.  Here, the second tower section weighing 53 tonnes is lifted into place

Now the top section weighing 45 tonnes is located into position...

The nacelle was next, weighing 70 tonnes followed by the preassembled three-bladed propeller module. Each blade weighs 8 tonnes, with the assembled module being 42 tonnes.
The 70-tonne nacelle, the heaviest single load, is finally placed onto the 70-metre mast:

Here we can see the Grove GTK 1100 lifting one of the eight-tonne blades in tandem with a mobile crane, assembling the propeller module on the ground. Now click through here to see the final finishing touches as the blade and hub assembly weighing 42 tonnes is at last lifted into place.