Question # 1. Explain the concept of a building's "structural hierarchy"
and how it affects a building collapse.

[Answer on page:93]  ____________________________________________________

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Question # 2. Draw a floor system's structural hierarchy in space below:
[Answer on page 92]






Question # 3. [Answer on pp.1, 88,] What famous burning building collapse
revealed failure of the "structural hierarchy" as one of the causes.
How many firefighters died in this collapse?
What was the date of this collapse? In what city and state did this collapse occur? 

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