Lifting of a tugboat by Bok Seng
For the lifting of a heavy tugboat, the two largest cranes that Bok Seng from Singapore (SG) had at the time are standing ready.
The first crane is the fine Liebherr LTM 1750-9.1.
The crane is erected in TY configuration with the full ballast of 204 tonnes.
The second crane is the fine Kobelco SL6000.
The Kobelco is erected in HL configuration with 180 tonnes of ballast on the superstructure and 130 tonnes of ballast at the superlift.
Between the cranes, tugboat BS Pacific is standing ready to be lifted back into the water from the land. The tugboat had been taken out of the water for major maintenance. The tugboat is 27.56 metres long and weighs approximately 200 tonnes.
The lifting operation is about to begin. The Kobelco is erected with a 66-metre main boom and the Liebherr has telescoped the main boom to a length of 43.7 metres.
Both cranes pick up the tugboat at a radius of 15 metres. The Kobelco is lifting a total of 104.66 tonnes here including the rigging, and the Liebherr is lifting a total of 105.34 tonnes here including the rigging.
Slowly, both cranes move the tugboat towards the water. When the Kobelco has slewed in front of the superlift ballast, it is connected to the superlift boom because the Kobelco will shortly have to work at a greater radius.
The year of manufacture of the LTM 1750-9.1 is 2014 and it is still deployed for heavy lifting work almost daily.
Once the superlift ballast is mounted to the superlift, the lifting work continues. Slowly, the cranes slew the fine tugboat above the water.
The tugboat also belongs to Bok Seng. The vessel is 27.56 metres long and 7.93 metres wide. The tugboat has 1,600 hp and a crew of approximately 10 persons. The tugboat is generally used to manoeuvre pontoons over the water.
During the lifting operation, the Liebherr kept the load at 15 metres, while the Kobelco lowers the tugboat into the water at a radius of 23.5 metres.
The BS Pacific is back in the water.
A fine lifting operation carried out by the professionals of Bok Seng!