Marr Contracting has completed what it claimed as the world’s heaviest tower crane lift during the boring of a new subway tunnel in Australia. The specialist in large tower cranes used a Favco M2480D tower crane to lift a 225 tonne section of a tunnel boring machine (TBM) from an exit point along the subway tunnel. The TBM, named ‘Mum Shirl’, was one of two machines being used to drill tunnels for Barangaroo Station as part of the Sydney Metro City & Southwest public transport project. The 330 tonne capacity luffing jib tower crane was used to lift the front shield section of the TBM out of the ground in a single section. Marr Contracting said it made the enormous lift using the M2480D crane with a 55 metre boom and a six fall 330 tonne hook block. The crane was operated from inside a station box measuring 4 x 4 metres, that was located next to the TBM’s retrieval point. Simon Marr, managing director at Marr Contracting, said, “Tunnel boring machines are often used in urban settings with limited space and are traditionally installed and retrieved by crawler cranes and gantry set-ups which can take up a lot of room, are costly, and provide additional issues around ground pre...