Vessel Lifts

Bidlift utilises the Kramo jacking system for vessel lifts. The Kramo System can erect vessels to the theorectical height of 300 metres but to date have only performed lifts of up to 108 Metres.

The benefits of the Kramo system is that all jacks, power packs and general rigging plus monitoring systems are installed at ground level, they can also be dismantled at ground level. The system lends itself to self erection and the basic unit is 453(Te) jack which climbs at 200 mm square bar supported by a modular mast. The weight is distributed down the bar to ground level. Example is on one set-up lifting 9 x 1400 T chemical reactors in Texas City without guy wires.

The rig used here is a Superheavy 'guyless' one 60m tall. Each mast uses two 400 Tonnes climbing jacks giving a total jacking capacity of 3200 Tonnes

Erection of 563 ton, 86 metre Propylene Propane Splitter: To take advantage of the tall height and the position of lifting trunnions at 65 metres above the base rather than at top, the conventional straight lifting beam was replaced with "GOALPOST' or "U" shaped lifting beam spanning two masts. This reduced the necessary height of mast to 84 metres from 102 metres and the cranage to 140 tons from 450 tons respectively.