SECTOR SPOTLIGHT Ӏ BRIDGES
Who: Vernazza Autogru / Fincantieri / Tadano. What: Two lattice boom crawler cranes used for tandem lift of bridge sections over road and rail lines at a busy port. Where: Porto di Prà, Italy.
Italian crane service provider Vernazza Autogru was commissioned by shipbuilder Fincantieri to lift two bridge sections, with a weight of 500 and 290 tonnes, for a bridge structure at the Porto di Prà shipyard.
The loads comprised bridge sections made of steel girders with a concrete deck on top. The loads had to be lifted and then moved, whilst in the air, onto pillars. For this Vernazza Autogru selected to use its Tadano CC 68.1250-1
and CC 38.650-1 crawler cranes. A tandem lift was used for the
500-tonne bridge section, while the CC 68.1250-1 lifted the 290-tonne section on its own. The CC 68.1250-1 was set up with an SSL configuration, a 72-metre boom, and 450 tonnes of Superlift counterweight; the CC 38.650-1 was also set up with an SSL configuration and a boom of the same length, but 325 tonnes of Superlift counterweight. The two cranes lifted and moved the
500-tonne section together at a radius of 50 metres and a height of seven metres, while the CC 68.1250-1 put the 290-tonne section in place at a radius of 41 metres and a height of nine metres. The lifts were over existing bridges, the Genoa-Ventimiglia railway line and a busy road – so needed to be conducted as quickly as possible to minimise disruption. From planning to completion the
Vernazza team was on-site for a total of four months and the job went smoothly.
CRANES TODAY 35
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