At 40 feet wide, one of the world’ s largest self-climbing core systems rises above Lower Manhattan, climbing skyward wall by wall and self-supporting as it goes – at present, a scale rarely seen in self-climbing construction.“ There’ s only a handful of companies globally that have the engineering knowhow and the equipment availability to pull off this kind of construction,” says Michael Kennedy, CEO of Doka USA – the formwork and scaffolding company behind the pioneering project. It is, by Michael’ s own estimate, likely the largest core project ever built in North America.