Installation and support method including a tower crane for supporting a high-voltage line electric cable

A support method for supporting at least one electric cable belonging to a high-voltage line, during implantation or maintenance work of the high-voltage line,

• the support method comprising the steps of:
• providing for a tower crane comprising a mast and a jib rotatable relative to the mast,
• placing the tower crane in the service configuration so that:
• the jib is linked to an upper portion of the mast, the jib extends according to a jib direction, and the mast extends according to a mast direction which is substantially vertical,
• equipping the tower crane with support members secured to the jib and configured to support said at least one electric cable at a plurality of locations distant according to the jib direction,
• extending the support members substantially transversally to the jib direction so that the support members protrude laterally from the jib,
• positioning the jib with a free end portion located opposite the mast so that the jib is cantilevered when the support installation is in the service configuration, and locking the jib in rotation relative to the mast with a locking device,
• wherein the support members are disposed at a plurality of locations along a length of the jib on each side of the jib and protrude laterally from each side of the jib, and
• wherein each of the support members is displaceable between an unfolded configuration, in which each support member protrudes laterally from the jib, and a folded configuration, in which each support member is disposed adjacent the jib.

A tower crane comprising:

• a jib rotatably connected to an upper portion of the mast and extending in a jib direction, wherein the jib is cantilevered on the mast in a cantilevered condition;
• and
• support members secured to the jib at a plurality of locations spaced in the jib direction along a length of the jib so as to extend laterally outward from the jib, wherein the support members are configured to support cables with the jib in the cantilevered condition,
• wherein the support members are disposed at a plurality of locations along a length of the jib on each side of the jib and protrude laterally from each side of the jib, and
• wherein each of the support members is displaceable between an unfolded configuration, in which each support member protrudes laterally from the jib, and a folded configuration, in which each support member is disposed adjacent the jib.