1. WTC COLLAPSING
Salih Bin Abu Bakar
Mohamad Fazri Bin Ithnin
Hermansyah Bin Nordin
Khairul Azmil Bin Mohamad
Professional Ethics Management

2. What Failed?
• Both south and north towers
of World Trade Center
collapsing into the ground.
• Emergency exit at the World
Trade Center.
• Truss that support the inner
core and the outer frame of
World Trade Center.

4. Why It Failed?
The impact from the plane.
Material that have been used to protect the
exit stairway and the truss is not strong
enough to withstand the impact.
The heat from fire causing the truss lose about
half of its strength.

6. North Tower
• The plane struck at the center of the tower.
• The tower collapsed because the inner core
cannot withstand the load without support
from the truss.

7. South Tower
• The plane struck only a bit of the tower inner
core but the impact is much more lower from
the north tower.
• So the load the south tower withstand is much
more bigger.

8. Possible Corrective Action
Engineer must consider all the critical and
overwhelming factor that can happen for their
design.
Safety exit or plan must be the main priority
when engineer designing a building.

9. Who Was At Fault? Why?
The Designer Team
• They didn’t consider the most important
factor which is safety of the people in that
building.
• The rather want cut cost and make the
building design is much more realistic.

10. Thank You
Professional Ethics Management