Patent ID: 8051569

Claim:
A method of building a boiler frame comprising the steps of: extending supporting posts to a top level, a top floor unit being temporarily fixed to a height corresponding to an intermediate floor level between the supporting posts, a top of the supporting posts being connected by beams to form a top area; installing a lifting jack on the top area, the lifting jack being connected to the top floor unit and an intermediate floor unit with a traction device suspended from the lifting jack; forming a multi-floor unit by linking the intermediate floor unit and at least one lower floor unit with a linking device; lifting the multi-floor unit with the traction device to a floor level below the top floor unit; connecting the top floor unit to the multi-floor unit with the linking device; temporarily fixing the lower floor unit to the supporting posts at a middle position prior to disengaging the lower floor unit from the multi-floor unit; releasing the temporary fixation of the top floor unit from the supporting posts; jacking up the top floor unit and the multi-floor unit excluding the lower floor unit; and permanently fixing the top floor unit and each floor of the multi-floor unit to respective designated positions.