CSCS Fire Safety 4 — Questions and Answers
Question 1: What does the term 'fire load' mean?
- The weight of fire extinguishers on site
- The total amount of combustible material in a given area, measured in MJ/m² (Correct answer)
- The number of fires that have occurred
- The cost of fire damage
Correct answer: The total amount of combustible material in a given area, measured in MJ/m²
Fire load is the total heat energy that would be released if all combustible materials in an area were to burn. It is measured in megajoules per square metre (MJ/m²) and influences fire severity, compartment design, and structural fire resistance.
Question 2: What is a fire risk assessment and when must it be carried out?
- An insurance valuation done every 5 years
- A systematic evaluation of fire hazards and risks that must be carried out before work starts and reviewed regularly (Correct answer)
- A fire brigade inspection
- A building regulation approval
Correct answer: A systematic evaluation of fire hazards and risks that must be carried out before work starts and reviewed regularly
Under the RR(FS)O 2005, a fire risk assessment must identify fire hazards, people at risk, evaluate the risks, record significant findings, and plan emergency procedures. It must be carried out before occupation and reviewed regularly or when changes occur.
Question 3: What are the main sources of ignition on a construction site?
- Only electrical equipment
- Hot work, electrical faults, smoking, heating equipment, and arson (Correct answer)
- Solar heat only
- Lightning only
Correct answer: Hot work, electrical faults, smoking, heating equipment, and arson
Common ignition sources on construction sites include hot work (welding, cutting, grinding), electrical faults, discarded smoking materials, temporary heating equipment, and deliberate fire-setting (arson). All must be controlled through site management.
Question 4: What is the minimum fire resistance period for a fire door in an escape route?
- 15 minutes
- 30 minutes (FD30) as a minimum, with higher ratings required in some situations (Correct answer)
- 60 minutes in all cases
- No minimum requirement
Correct answer: 30 minutes (FD30) as a minimum, with higher ratings required in some situations
Fire doors in escape routes must achieve at least FD30 rating (30 minutes fire resistance). Higher ratings (FD60, FD90, FD120) may be required depending on the building's risk category, height, and compartment strategy.
Question 5: What is the significance of fire stopping in construction?
- It stops construction work during a fire
- It seals gaps and openings in fire-resistant structures to prevent fire and smoke from spreading through them (Correct answer)
- It is a type of fire alarm
- It refers to the fire brigade stopping a fire
Correct answer: It seals gaps and openings in fire-resistant structures to prevent fire and smoke from spreading through them
Fire stopping involves sealing penetrations, joints, and gaps in fire-resistant walls and floors (around pipes, cables, ducts) to maintain the fire compartment's integrity and prevent fire and smoke from spreading through these openings.
Question 6: What is the required clearance around a fire extinguisher point?
- No clearance required
- Extinguishers must be visible, accessible, and not obstructed — mounted on brackets or stands (Correct answer)
- At least 3 metres clearance
- They must be locked in a cabinet
Correct answer: Extinguishers must be visible, accessible, and not obstructed — mounted on brackets or stands
Fire extinguishers must be sited on dedicated stands or wall brackets, clearly visible, and accessible without obstruction. They should be located on escape routes near exit doors, at a height where the handle is approximately 1 metre from the floor.
CSCS Fire Safety 4
What does the term 'fire load' mean?