On a concrete foundation the 10X10m wide tower forms the base for the kind of roller-bearing ring supporting the upper crane in 56m height. A rope controlled slewing mechanism allowed the crane to swing around 180 degree in both directions in order to cover a 360 degree working radius. A further unique design feature were the three water ballast tanks at 14m counterradius of the giant luffer with up to 76m working radius. At 46m outreach the capacity was still 70t, while at 73m radius 40t could be handled. A single line runner for 5t capacity speeded up small lifts. Concerning the huge dimensions of the crane components it seems to be unusual to incorporate no self climbing concept. However it was thought that where this giant is going to be installed there is adequate mobile crane power to be found. In order to reduce the surface exposed to the wind all framework is made up of tubes. Unfortunately the Krupp giant was scrapped after its last job at the brown coal power plant Neurath was completed in 1988.
Custom-built
Some of the biggest luffers were customer-built single units, such as the Krupp ‘stationary luffing jib erection crane’ manufactured in 1978 for construction of the reactor building of the Neckarwestheim, Germany power plant.