The WT Society is fond of using the tilt-up method of construction where a network of rebar is made on the ground, concrete poured on it and allowed to cure, then the whole thing is tilted up and voila' you've got yourself a massive big-ass wall ready made. These walls for several stories-high buildings are indeed massive and weighty so you need a heavy-duty crane to raise into position.
I just heard from an eye-witness LDC volunteer that while there a few weeks ago they had an enormous accident. The crane tilted and crashed, the only one hurt was its operator. It seems that the ground hadn't been properly packed/rolled down and when they'd moved the crane to the new spot and started to move and raise the newly cured massive wall, the ground underneath shifted because of all the weight and the crane tilted and fell sending the new wall crashing back to the ground.