Liebherr ATs for facade installation

As part of the refurbishment of the lobby on the ground floor, façade specialist seele was asked to design, manufacture and install an 1800sqm steel and glass facade for the entrance area.

In July, an LTM 1090-4.2 operated by BKL Baukran Logistik took on the hosting work for the first 17m long glass element, which with a weight of around 6t is probably one of the largest laminated curved panes of glass to be installed in a high-rise block to date. A special glass vacuum system with 92 cups and a hoisting force of 9t was used to hoist the glass to a height of around 20m, requiring a great deal of precision.

Since August, the crane specialists from BKL have been using an LTM 1100-4.2 to install the next 6t elements which had to be hoisted up to 25m laterally and vertically as part of the refurbishment work. The installation work is scheduled to continue until November.

One of the special challenges of this crane job was the limited crane set-up area on the skyscraper’s underground car park, which meant that mobile cranes with a maximum of just four axles could be used. The limited ground pressure of the crane outriggers also had to be given due consideration when planning the job.