Chunjo Construction in 670 tonne lift

Construction company Chunjo Construction used a Manitowoc 31000 crawler crane to lift a 670 tonne wash tower at the Korea Petrochemical LTD plant in Ulsan, South Korea.

The wash tower measured 92 metres tall and weighed 670 tonnes. To carry out the lift the 2,300 tonne capacity crawler was configured with 120 m main boom and positioned between existing refinery equipment and a small river, leaving a limited space of only 15 m for the counterweight.

The 31000’s variable position counterweight (VPC) system made the lift possible because the counterweight could be suspended above the ground.

For the lift the 31000 was transported to Ulsan from a job site in Taean, 400 km away, and erected on site within nine days. The lift was carried out with the support of a Manitowoc 18000 crawler crane.

Jang Hwan Chang, Chunjo chairman, said, “Any other crane would have taken eight months to complete this lift but we did it in just three – no other crane would be able to come close to that timeframe.”