Significant Hazrds

Question 1

If fire effects surfaced mounting cabling within a tall building what are the risks to BA crews committed for FF purposes?

Answer 1

Electrocution
Entanglement

Question 2

When tall buildings are under construction and or during refurbishment what risks may be present

Answer 2

Fire fighting facilities and active or passive fire protection features may be incomplete or absent
Effective compartmentation may be breached by modern services which for aesthetic reasons may be concealed in voids or behind panels
Site works may delay access
Building works can be completed on phases, combining partial occupancy and ongoing construction

Question 3

A DEFECTIVE RISING MAIN MAY CAUSE WHAT?

Answer 3

Ineffective water supply to attack the fire
Flooding of floors and stairwells
Flooding leading to failure in lifts
Mechanical failure if riser furniture or fixings leading to physical injury

Question 4

What are risks and hazards associated with wind driven fire?

Answer 4

Wind speed increases with height. Tall buildings can create unpredictable and complicated wind patterns
Failed or opened windows / doors can create a blow torch effect
Individual units within a building are sealed compartments which provide conditions for backdraft if glazing fails
Potential for flash over due to ventilation and fire loading

Question 5

Default access will be via a protected staircase unless the lift has been identified as suitable, true or false?

Answer 5

True

Question 6

What is the stack effect?

Answer 6

When smoke travels in a downward direction within a staircase enclosure due to the downward pressure from natural wind effects acting upon openings throughout the building