English: to show how structure varies through height. It is to show evolution of skyscrapers structural design. It is to visually show how the structural design evolves as greater heights are reached. Thanks to fazlur rahman khan
{{subst:Upload marker added by en.wp UW}} {{Information |Description = {{en|to show how structure varies through height. It is to show evolution of skyscrapers structural design. It is to visually show how the structural design evolves as greater heigh...