Originally Posted by IronMan
Looks like regular cranes on site at the Fortis building so they may not be installing a tower crane. They did not use a tower crane on the Delta extension and that was twelve floors as well.
The Delta was an extension, so it might have been considered less than desirable to have it looming over the building while it was still occupied.
Tower cranes are often put through a central elevator core, but Fortis Place will have two cores, each at opposite ends, so that would not be as practical. Alternatively, cranes are often located centrally adjacent to the building. They would normally have one for a building of this size or even smaller.