Method of and arrangement for building cylindrical hollow structure

A method of building a cylindrical hollow structure, comprising (1) preparing separate lower and upper structural units having substantially congruent circular cross sections, the lower structural unit having a helical upper edge having lowermost and uppermost ends and continuously sloping upwardly from the lowermost end to the uppermost end and a vertical edge joining the lowermost and uppermost ends and the upper structural unit having a helical lower edge having uppermost and lowermost ends and continuously sloping downwardly from the uppermost end to the lowermost end of the lower edge and a vertical edge joining the uppermost and lowermost ends of said lower edge, the respective helix curves of the helical upper and lower edges of the lower and upper structural units being substantially identical with each other, (2) positioning a pliurality of carriers on said helical upper edge at predetermined intervals substantially throughout the length of the upper edge, each of said carriers being in rollable contact with said helical upper edge, and an open-end chain of link units on said carriers, said link units being pivotally connected to one another and each having a cross wall portion having substantially flat lower and upper faces located over the adjacent portion of said helical upper edge, each of said link units having at least one of said carriers located below the cross wall portion thereof, (3) mounting said upper structural unit on said chain in weight transmitting relationship to said lower structural unit through the respective cross wall portions of said link units and said carriers, said vertical edge of the upper structural unit being located adjacent to said vertical edge of the lower structural unit, (4) intermittently driving said chain for stepwise moving the chain upwardly along said helical upper edge of the lower structural unit with said carriers in rolling contact with the helical upper edge, the upper structural unit being thereby stepwise rotated about the vertical center axis thereof and moved upwardly over the lower structural unit and the vertical edge of the upper structural unit being stepwise spaced apart from the vertical edge of the lower structural unit for forming a generally parallelogrammic open space between the vertical edges, (5) securely connecting an additional structural member edgewise to the upper structural unit through said open space, the additional structural unit thus connected to the upper unit having a vertical edge slightly spaced apart from said vertical edge of the lower structural unit, (6) repeating the step of (5) a predetermined number of times for successively applying a plurality of additional structural members to the upper structural unit and the structural members precedingly applied to the upper structural unit for forming part of an intermediate side wall portion of the hollow structure to be built, (7) further applying additional structural members to the intermediate side wall portion being constructed and to the structural members precedingly applied to the incomplete intermediate side wall portion until the upper structural unit is raised to a desired level, (8) lifting the intermediate side wall portion and the upper structural unit above said chain, and (9) removing said chain and said carriers from the lower structural unit and the intermediate side wall portion.