CHAPTER 6

Question 0

The failure of which structural member will have the potential for more dire consequences than the failure of the others

Answer 0

Column

Question 1

Fire resistance and hence collapse potential of a floor is directly related to what two features

Answer 1

Mass (or Bulk) and the spacing of floor supports

Question 2

A multi level floor collapse, the most deadly type of floor collapse, most often occurs in which type of burning buildings

Answer 2

Those with frontages over 25 feet containing a system of columns and girders

Question 3

During which stage of fire is there the most potential for a floor collapse

Answer 3

Decay stage

Question 4

Which sloping roof construction method has the most unsupported roof deck

Answer 4

Timber Truss

Question 5

A firefighter can protect himself when working on a peaked roof by using a roof ladder that is hooked into the ridge rafter. This will not protect the firefighter from this type of collapse

Answer 5

Roof Rafter collapse

Will protect a firefighter from

• Slip and fall from roof
• Roof deck collapse

Question 6

What is the most common cause of EARLY floor collapse in a structural fire

Answer 6

Pre-engineered or lightweight truss construction

Question 7

A ceiling in a finished basement can provide at least how many minutes of fire protection for the floor supports above it

Answer 7

20 minutes

Question 8

A building with a frontage of 25 feet or more

Answer 8

Usually has columns and girders

Question 9

A building 25 feet of less can have floor beams supported by

Answer 9

Bearing walls on each side

Question 10

The most dangerous time for floor collapse is during the

Answer 10

• End of the fire
• Decay stage
• After fire has been extinguished