World Trade Center:

LIST OF FIGURES IV
ERROR! NO TABLE OF FIGURES ENTRIES FOUND.EXECUTIVE SUMMARY IV
EXECUTIVE SUMMARY V
1 – INTRODUCTION VI
1.1 – HISTORY VI
1.1.1 – Inspiration for towers vi
1.1.2 – Brief summary of the project vi
1.1.3 – Demise of the towers vi
2 – FRAMED TUBE SYSTEM VII
2.1 – THE CENTRAL CORE VII
2.1.1 – Design specifications vii
2.1.2 – Components housed within the core vii
2.2 – THE OUTER SHELL VII
2.2.1 – Design specifications vii
2.2.2 – Construction materials viii
2.3 – BENEFITS OF THE TUBE FRAMED SYSTEM VIII
2.3.1 – Less demanding on materials viii
2.3.2 – Reduced specifications viii
3 – EFFICIENCY IX
3.1 – SKY LOBBIES IX
3.1.1 – Explanation of system ix
3.1.2– Spatial savings ix
3.1.3– Capacity ix
3.2– IMPORTANCE OF ELEVATORS X
3.2.1– Searching for solutions x
3.2.2– Simulation analysis x
4 – EXTERIOR PANELING XI
4.1 – CONSTRUCTION XI
4.1.1 – Materials xi
4.1.2 – Fabrication xi
4.2 – DESIGN XI
4.2.1 – Wind loadings xi
4.2.2 – Specifications xi
5 – CONCLUSION XII
5.1 – FRAMED TUBE SYSTEM XII
5.1.1 – Superiority in complex loadings xii
5.2 – ELEVATORS XII
5.2.1 – Efficiency of sky lobby system xii
5.3 – EXTERIOR PANELING XII
5.3.1 – Safety xii
5.3.2 – Loading benefits xii
LIST OF REFERENCES XIV


List of figures
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Executive summary


1 – Introduction
1.1 – History
1.1.1 – Inspiration for towers
    The idea for the World Trade Center originated during the 1939 World Fair in New York. However, it was not until 1960, when American technology was on the rise, that the planning for the construction was put to fruition under the powerful leadership of Chase Manhattan Bank’s David Rockefeller.   The location for the engineering marvel was to be set in lower Manhattan. Along with The Port of New York Authority, Minoru Yamasaki and Associates, as well as many other design firms, began the design for the world’s largest office complex which was unveiled in 1964. Construction... [continues]

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