Duke Tower Kitchener | 39 fl | completed

[ijmorlan]

The average tower crane can lift 39 000 lbs near the centre of the jib  An excavator like the ones being utilized weigh much more than that.  The excavator just reaches down and pulls up the dirt and places in the truck,  They slowly walk toe excavator out of the hole utilizing the tracks and the shovel.  The shovel is much more powerful than the tracks..

Thanks for the information. I think in my mind I was implicitly thinking of it as a much deeper hole, one that you could not reasonably scoop down to from ground level, nor maneuver an excavator out of. I remember wondering the same when they did the excavation for the QNC at UW, and although I saw some parts of the excavation I missed the last bit where they removed the last of the ramp and got the machinery out.