Crane assembly

摘要

A crane assembly for the lay-down area 20 of an offshore installation includes a crane 10 mounted on the lay-down area 20 and having an in-use configuration to raise and lower a load (L fig. 1) from its head 12 at a position extending beyond the boundary of the lay-down area 20 (fig. 1), the crane 10 also having an access configuration in which the head 12 of the crane 10 is positioned above a raised area 22 of the lay-down area 20. The access configuration may allow a worker to access loading points 60 or other features near to the head 12. The crane 20 may rotate about a vertical axis between the in-use and access configurations. The crane 20 may comprise a bowing mechanism to bow from an in-use configuration to an access configuration. The bowing mechanism may include an horizontal pivot (30 fig. 3F) remote from the head 12 and a locking pin (32 fig. 3D) which may be removed from a slotted fitting (38 fig. 3F) to allow the crane 10 to rotate about the pivot (30 fig. 3F). The horizontal pivot (30 fig. 3F) and locking pin (32 fig. 3D) may be accessible to a worker on the lay-down area 20. The crane 10 may rotate about the pivot (30 fig. 3F) by means of a removable manually operated hydraulic actuator (34 fig. 3F) fitted between attachment points (36A, 36B fig. 3F).