Offshore platform deck removal system and method

An assembly for lifting a payload of an offshore platform, said offshore platform comprising at least one support structure supporting the payload, said payload comprising at least one main deck and at least one column directly connected to said at least one support structure, said at least one column supporting said at least one main deck;

• said assembly comprising:
• at least one lower lifting device, having at least one welding surface weldable to a welding portion of said at least one column of said payload;
• at least one upper lifting device having a coupling interface adapted to couple to a coupling portion of said payload;
• a plurality of tension rods, connecting said at least one lower lifting device and said at least one upper lifting device;
• wherein said welding portion of said at least one column is located at a lower level in respect of said at least one main deck of said payload and said coupling portion of said payload is located at a higher level in respect of said welding portion so that, when said assembly is in operative condition, said at least one upper lifting device is located at a higher level in respect of said at least one lower lifting device;
• and wherein:
• at least some tension rods of said plurality of tension rods extend for a rod length along a rod direction (X-X) between said at least one lower lifting device and said at least one upper lifting device;
• and
• at least some tension rods of said plurality of tension rods are pre-tensioned, to exert a compressive action to said payload.