Abstract: A method of constructing a shaft furnace is provided, as well as an assembly and a fixation structure therefor. The method comprises the steps of providing on a first position a furnace segment comprising a ring wall extending along a central axis, and transporting the segment to a second position and operably attaching the segment there to one or more further blast furnace portions. The method further comprises that during said transporting the segment to the second position the segment comprises at least one fixation structure comprising a plurality of tensioned tensile members attached to the wall determining a shape of the segment.