Method for onshore or offshore erecting an upstanding construction

A method of up-ending a crane, the crane comprising:

• a mast;
• a hoist rotatably mounted on the mast;
• a vertical support and guide facility, wherein the vertical support and guide facility comprises mounts releasably attachable to an upstanding construction comprising longitudinal construction parts, which mounts are attached to the mast such that the mast is movable up and down along the upstanding construction when, at least some of, the mounts are attached to the upstanding construction, wherein the mounts comprise a lower mount, an upper mount and an intermediate mount between the lower mount and the upper mount, the intermediate mount being displaceable between the lower mount and the upper mount in opposite directions along the longitudinal direction of the mast, wherein at least one of the upper mount and/or the lower mount is a displaceable mount which is displaceable, relative to the mast, between the intermediate mount and an extremity of the mast, in opposite directions parallel to the longitudinal direction towards and away from the extremity;
• and wherein the crane further comprises:
• a platform for up-ending the crane, wherein the platform comprises a support for transporting a bottom segment of the mast of the crane in a non-upright position, the bottom segment being provided with at least two of its mounts, wherein the platform comprises a powered tilting system for tilting the bottom segment relative to the support and vice versa, the method comprising the steps of:
• using the powered tilting system to put the bottom segment in an upright position;
• fixating the then upright bottom segment of the mast relative to the upstanding construction by attaching the at least two mounts of the bottom segment to the upstanding construction;
• using the powered tilting system to then tilt the support relative to the upright bottom segment to put also the support in an upright position;
• putting at least one further segment, including a top segment, from a non-upright position in an upright position and guiding the at least one further segment along the upright support to move them upwards, with a lower extremity of the at least one further segment beyond the top of the bottom segment;
• and
• placing the at least one further segment on top of the bottom segment.