World Trade Center And Manhattan 1:2 -

Classic Manhattan skyscrapers, dictated by the 1916 Zoning Resolution, traditionally followed a proportion where the upper tower occupied roughly half the footprint of the base (or respected tiered setback ratios). Architect Minoru Yamasaki disregarded this entirely. The Twin Towers rose as perfectly sheer vertical tubes, maintaining a constant 209-foot by 209-foot square floor plan from bedrock to roof. This introduced a massive, unprecedented volume of scale that dwarfed everything around it. III. Structural Engineering as an Enabler of Form

Module 3: The History of the World Trade Center - 911 Memorial World trade center and manhattan 1:2

The Port Authority razed 16 acres of active, small-scale industrial and electronic shops (the famous "Radio Row") to create a singular massive superblock. This permanently de-mapped several historical streets, detaching the complex from the traditional Manhattan street grid. Classic Manhattan skyscrapers, dictated by the 1916 Zoning

Instead of using a traditional grid of heavy interior columns, engineers Leslie Robertson and John Skilling moved the load-bearing columns to the outside perimeter. This left the floor plates completely open and column-free, offering massive acre-sized workspaces that financial corporations demanded. This introduced a massive, unprecedented volume of scale