Some reasons for using a luffing jib tower crane, instead of other types of tower crane:
1> This kind of crane is frequently the best solution when several cranes are working on the same site, avoiding any kind of crash with other cranes or the sorrounding buildings. With their variable working radius, they don’t interfere in the working area of the other cranes on site and they can be parked with a very reduced radius.
2> And luffing jib tower cranes can improve material handling cycles in the jobsite, using them like auxiliry cranes to the pricinpal tower cranes, reducing the construction time.
3> Normally, the maximun load bigger than a tower crane’s.
4> In some places, local laws make luffing jib tower cranes necessary. For example, some places don’t allow any crane to fly over the sorrounding spaces when they are working in a jobsite, and luffing jib-cranes are very demanded because you can move the jib fron the horizontal position up to the total vertical position.