Wright’s most interesting buildings are those that were based on a significant structural idea, such as huge mushroom type columns or adventurous use of canti- levering. The structural engineer J. J. Polivka contrib- uted greatly to his projects from 1946 on. Wright also liked to use collisions of triangular forms, used specially in his taller buildings where they appear both in plan and on the exteriors.
FLW + J.J. Polivka (structure). The 14 storey research tower of the Johnson Wax Company, 1944-50
Rogers Lacy Hotel, Dallas, 1946, with the collaboration of Polivka
Left: S. C. Johnson and Son Research Tower, 1944-50 - Section - Tapering floors cantilevere out from the core.
The mushroom type or dendriform column of the main Johnson Wax Com- pany building, 1936-1939
Harold C. Price Company Tower,1956 - Each two floor unit is double height in part, where the line of the internal balcony extends out to form a small tri- angular balcony beyond the curtain walling. The vertical and horizontal fines are in copper. Concrete wall extends above roof level and slant inwards to engage with other elements that form the way the building finishes at the top. The main bulk candilevers over the base.