While not all that recent, I thought this article was very interesting.
http://www.bluescopesteel.com.au/go/case-study/western-australian-firm-makes-light-work-of-heavy-lifting
A contract to build the largest portal frame was won in Western Australia by a local firm Vector Lifting. Multiplex had issued the challenge (worth $8 million) to a worldwide audience.
The crane can lift up to 200 tonnes on its two crabs.
The major beam of the crane weighs 155 tonnes, and there is a total of 650 tonnes of steel in the entire crane.
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