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11. Explain the design theory of engineer Khan on tall structures.

• Bangladeshi-American engineer believed tall structures should bear their weight where widest and most stable - on the outside.

12. Explain the tubular design by Engineer Khan.

• These buildings had exterior steel frames that were braced with concrete and connected to horizontal floor beams.

13. Name the skyscraper that is built following Engineer Khan's Tubular design and what design is implied to it.

• John Hancock Building - the Hancock Building has prominent exterior trusses, causing the style to be called a trussed tube.

14. In a single sentence, explain the design of the Burj Khalifa.

• Elegant and balanced design.

15. Beneath this spectacular engineering marbel, explain what happened during the construction of the Burj Kahlifa.

• One died because of falling of the clip while working, but hundreds of them are dying a slow terrible death marred by diseases they catched while working to build that tall building.

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