1.   For example, if the number of tower cranes on site is critical, all tower crane movements must be separately identified in the computer model.

2.   City officials and industry executives said tower cranes have a good record overall.

3.   He could remember none that involved fire and a tower crane.

4.   The tower crane has not been implicated in the accidents, however.

5.   The tower crane is broken down, and the derrick lowers it to the street in stages, starting with the boom.

6.   The tower crane is used to erect a smaller crane, called a stiff-leg derrick, on the rooftop.

7.   Tower cranes in the distance promise more.

8.   Tower cranes are operated by licensed riggers.

9.   Shepherd also commented on the rapid development taking place here with tower cranes all over the place.

10.   The centre is equipped with technical equipment such as tower cranes, mobile cranes, truck-mounted cranes, crawler cranes and hoisting equipment of various types.