Armac is currently undertaking a difficult job in deconstructing the top 4 floors of the Alstom Power Building in Stafford. It's difficult because the building sits above the Turbine Hall which contains the largest overhead crane in Europe and must remain operational.
The equipment chosen to carry out the job is a 70t crawler and a 3t mini crawler crane. As Noel McLean, Contracts Director, explains:
The problem with using the main 70t crawler is that every lift would have been a blind lift so it can be slow to centre the hook using radios. With the use of the 3t mini crawler we can quickly dismantle the steel frame with top burners and rest cuts and then lower several steel sections at a time to ground level with the large crawler.
The crane can also pick and carry the sections to a central loading out point. We assessed the permissible floor loadings and designed the lift plan around the use of the 3t crawler with great success. We have removed an entire floor of steel in 2 days using 2 top burners and the mini crawler, literally halving the original programme time for each floor.
Source: Armac Group
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