List the actions to take when imminent building collapse is suspected.

List should include the following actions:

• Set up a collapse zone upon arrival.
• Perform emergency evacuation of personnel.
• Conduct accountability report.
• Prohibit personnel and equipment from operating within the collapse zone.
• Use unmanned master streams within the collapse zone, if fire streams are necessary.

Process/Skill Questions:

• What is a collapse zone, and what determines its size?
• What types of additional defensive techniques might fire service personnel use, even after establishing a collapse zone?
• Why did so many firefighters perish during the attack on and destruction of the World Trade Center buildings in New York City on September 11, 2001?