Danke, auch von mir an das Team von Four Frankfurt. 
Already a few weeks ago we reported about the so-called outrigger installation in T1 of the FOUR. The outrigger is a massive stiffener that stabilizes the tower at a height of 180 meters and reduces vibrations. We accompanied our partner Stahlbau Vogel during the installation of this special component. Over the next few weeks, a total of more than 700 tons of steel will be used for the outrigger at a dizzying height. Around 100 individual parts with individual weights of up to 20 tons will be joined together with almost 3000 bolts. Added to this are another 600 tons of reinforcing steel for the slab and core reinforcement and a shoring system for the formwork - nothing works without teamwork here.
https://www.instagram.com/p/CrvkWG3oCae/
I highly recommend this video, why isn’t a similar video made for the construction of 270 Park Ave?