02/11/2021 Liebherr LTM 1230-5.1 mobile crane installs elevator shaft against the backdrop of the Frankfurt skyline

  • LTM 1230-5.1 completes job in Frankfurt’s pedestrian zone on a Sunday
  • 75 metres – Liebherr 230 tonne crane has a particularly long telescopic boom
  • Cobblestones protected with rubber mats and load distribution plates

Passers-by were treated to a rather rare site in a pedestrian zone at the end of January in Frankfurt city centre – a 5-axle mobile crane extended its long telescopic boom high above the fronts of the buildings. Hanging from its hook were components of an elevator shaft which had to be installed at the rear of one of the buildings. The red crane was the Liebherr LTM 1230-5.1 operated by Frankfurt-based crane and heavy haulage specialist Autodienst West Ganske GmbH (ADW).

Autodienst West installs an elevator shaft in Frankfurt city centre.

Autodienst West installs an elevator shaft in Frankfurt city centre.

Autodienst West installs an elevator shaft in Frankfurt city centre.

As the pedestrian zone was the only possible site for the crane, the work had to be carried out on a Sunday. Weekend work is nothing out of the ordinary for crane contractors as they regard themselves as service providers who are available at all times for their customers.

One challenge was not to damage the smart paving stones of the pedestrian zone: because the supports of the Liebherr 230-tonne crane can press on the ground with up to 113 tonnes each when in use. Therefore, the ADW team first laid rubber mats on the pavement before four steel load distribution plates, each measuring nine square metres, were laid out at the designated positions of the crane supports. These plates enabled the maximum ground pressure to be limited to 12.5 tonnes per square metre.

The components, weighing up to 6.5 tonnes, were installed with a radius of up to 40 metres.

The components, weighing up to 6.5 tonnes, were installed with a radius of up to 40 metres.

The components, weighing up to 6.5 tonnes, were installed with a radius of up to 40 metres.

The LTM 1230-5.1 was ballasted with 72 tonnes of counterweight for this job, because the heavier component of the lift shaft, which had to be lifted in two parts at a lifting height of 30 metres and an outreach of 40 metres, still weighed 6.5 tonnes. The crane and team completed the job with ease, which meant that the 60 tonne crane was able to leave the site again just eight hours later.

The Liebherr LTM 1230-5.1 mobile crane has a 75 metre telescopic boom, making it ideal for working with the boom fully raised and at large hook heights, for example for erecting tower cranes or maintenance work for wind turbines. As the job in Frankfurt city centre showed, however, this universal crane can also easily complete jobs which require large radii.

Rubber mats and steel load distribution plates protect the cobblestones in the pedestrian zone.

Rubber mats and steel load distribution plates protect the cobblestones in the pedestrian zone.

Rubber mats and steel load distribution plates protect the cobblestones in the pedestrian zone.

Autodienst West Ganske GmbH has more than 75 years of experience as a crane and heavy haulage contractor. The Frankfurt-based company is now part of the Hüffermann Group, which provides a full range of crane and heavy haulage logistics services. In addition to mobile & crawler cranes with lifting capacities of up to 750 tonnes, and tower cranes, the company can also provide truck loading cranes, mini-cranes, truck work platforms, heavy installation services, traffic management & glass installation work as well as haulage services for heavy and special loads of up to 100 tonnes, including transport escort and permit services.