Jack-up barge crane
3D FORAN model of the self-elevating platform, showing the deck arrangement (crane has been removed for clarity)
FORAN, developed by the Spanish engineering and technology group Sener, has been the CAD/CAM system used in the engineering.
Called SEP – SAMRAT, the vessel is a non-propelled self-elevating platform having a total lifting capacity of almost 2,950 tonnes with the help of four legs and the corresponding jacking system, according to Sener. It is equipped with a central main crane and auxiliary systems, such as mooring winches, diesel generators, hydraulic power packs and transfer pumps.
The offshore barge has a length overall of 49.5m, breadth of 25m and draught of 2.5m. It has been classified by Bureau Veritas with class I + HULL + MACH, Offshore Self-Elevating Unit, Special Service / Construction Works, Indian Coastal – Summer Zone Transit, + ALM.
Leg height is 60m. The elevating spuds, which are pipe sections with 2.2m of outer diameter and 45mm of thickness, are actuated individually by a hydraulic jacking system, each of them capable of 1,055 tonnes of lifting force. The main crane is a Manitowoc 1800, with a rated capacity of 600 tonnes and a boom length of 97.5m. There are two generators, rated 335 kW each, as well as an emergency generator rated 130 kVA. The mooring is ensured by means of six winches, each one rated at 25 tonnes of pulling force.
