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Contractors World  -
2014 Vol 5 No 5
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Germany

Challenging Beam Lift on German Bridge

The continually rising volume of traffic and the strongly increasing heavy goods traffic have massively increased the need for rehabilitation of German motorway bridges in the past few years.

One such bridge is the Schiersteiner bridge, which links the regional capitals of Wiesbaden and Mainz over a length of around 1.3 kilometres.

the girders were hoisted in “tandem lift” and the relevant load was divided across two cranes,

Rapidly increasing costs for maintenance drove the decision maker to a complete rebuilding of the Rhine bridge.

In 2013, the construction phase was started with an expected project duration of six years. In order to be able to satisfy future requirements a solid load bearing construction was required, with the aim of balanced statics.

During installation of various bridge parts, in September this year, the crane company Krandienst Schuch received the job to hoist three steel girders with individual weights of 107, 44 and 40 tonnes from a transporter onto the bridge.

In order to guarantee safe operation, the girders were hoisted in “tandem lift” and the relevant load was divided across two cranes, using a 400 tonner ATF 400G-6 from Tadano and a 500 tonner LTM 1500-8.1 from Liebherr.

Just one month after the ATF 400G-6 was delivered to the crane company it was now able to prove itself against its full counterweight of 138 tonnes for the first time.

The ATF 400G-6 managed even the heaviest bridge part, where a total of 57 t (107 / 2 = 53.5 plus hook block and hoist rope) had to be lifted on a radius of 16 m.

This took place to the entire satisfaction of the Managing Director Christopher Schuch, who realised it did it without using a further 500 tonner, due to the good load bearing capacity values and compactness of the ATF 400G-6.

The 400 tonner from TADANO has one less axle, in comparison to its competitors, which is why it requires significantly less space on building sites.

Tadano Faun

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