Casar supplies new ropes for shipyard Goliath

12 April 2018

Casar has supplied replacement ropes for a Goliath crane operating at the Odense Steel Shipyard in Denmark.

The portal crane has been operating at the shipyard since 2001, when it was erected to replace a crane blown over in gales in December 1999.

For the first time since the Goliath began operating, the ropes needed to be replaced. German crane manufacturer Takraf Tenova—formerly Man Takraf—tasked Casar with supplying ropes and re-roping the crane.

The crane has a carrying capacity of 1,000t, a span width of 148m and a lifting height of 114m. It features four trolley, six lifting gears which can each lift 300t, and allows precise movement of entire ship sections.

The crane is also capable of lifting multiple objects at the same time, and rotating objects that are freely suspended. This method of operation—using multi-layer spooled lifting gears, some of which work with spreaders—imposes high demands on the production tolerances of the ropes, says Casar. This is particularly relevant with multi-layer wound drums, where even slight deviations in tolerance constancy in the ropes can result in tilting of the spreader and gaps in the spooling.

The order comprised almost 14km of Casar Turboplast in 36mm diameter, with a half in right hand and half in left hand ordinary lay. Compared to the ropes originally supplied in 2001, a higher nominal wire strength and a resultant higher breaking force was chosen.

The lengths of the rope had to be precisely measured to prevent tilting, added Casar. The ropes are seized at one end and at the other, feature a ‘Flemish eye’—a spliced rope loop which is also secured with a steel ferrule, able to withstand temperatures up to 400°C.