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Contractors World - INTERNATIONAL
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Contractors World INTERNATIONAL - 2016 Vol 7 No 2

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Terex Superlift 3800 Crawler Crane Used To Install Steel Bridge . . . continued

   

 

 

Mittler points out:

“Fortunately, though, the Superlift 3800 crane is really easy to transport, and that made our lives a lot easier. In fact, the modular quick-connect system, which makes it possible to split the crane’s basic structure into two parts, was one of the reasons why the Superlift 3800 was our crane of choice for this project.”

This enabled crane operators Daniel and Mike Schulz to set up the lattice boom crane within the allotted time frame of only two days despite the adverse conditions.

The unit was set up with an LH1 configuration with a 42-meter main boom, 205 tonnes of superstructure counterweight, and 50 tonnes of central ballast. However, the working area for the crane had to first be prepared with red ironwood crane mats, as the unstable ground would have otherwise been unable to bear the machine’s weight.

Precision work: a lift requiring a deft touch

Once the crane was in place, the crane and the working area were ready for lifting the new bridge. The structure was delivered in two sections and welded on-site, resulting in a total weight of 70 tonnes, including the required slinging gear.

After the load was meticulously rigged so that it would be perfectly balanced, the power to the overhead lines was turned off at 11:30 PM and the lift started.

Crane operator Daniel Schulz started by lifting the bridge, which was rigged at four attachment points, to a height of 6 meters at a working radius of 26 meters, in order to then swing it over the tracks with a skilful turn.

He then increased the working radius to approximately 30 meters by lowering the boom and moved forward with the Superlift 3800 crawler crane by about one meter.

That’s where the trickiest part of the lift came in:

“We had to set the bridge down on supports with laser-like precision to make sure it was in the perfect position. Thankfully, the Superlift 3800 is the ideal machine for that kind of precision work, as it has extremely sensitive controls that let you apply just the right touch. In the end, that made the challenge easy to handle,”

Schulz says while explaining what he considers to be one of the most important advantages of this Terex crane.

The tail end of the lift also went smoothly. In just ten hours, the Superlift 3800 crane was disassembled and loaded on trucks in order to start its journey to its next project.

[cw]


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