ABL project director Bruce Middleton said the structures arrived at the construction site “like a Mekano set” and had to be bolted together and “tensioned up” before the lift. A crew of 14, made up mostly of spotters, had to check all the connections and loading; and then watch them closely as two cranes lifted the structures. A 250-tonne crane assisted in rotation of the frames, while a 400-tonne crane took over the heavy lifting. “It’s not one of those things you want to lift without plans in place,” Middleton said. The first lift attempt on Friday was abandoned because of a loading issue, and the frames were erected on Saturday morning.