Fire Safety in Specialist Trades Flashcards

Why is fire safety of particular concern for electricians first-fixing in a timber frame building?

Answer: Timber frame construction is highly combustible and fire can spread very rapidly before the building is enclosed and fire-stopping installed

Timber frame buildings under construction are extremely vulnerable to fire as the full combustible frame is exposed before fire-stopping, plasterboard, and protective cladding are installed. A fire at this stage can destroy the entire structure within minutes.

What is fire-stopping and why is it important for specialist contractors?

Answer: Sealing gaps and penetrations in fire-resistant elements (walls, floors) where services pass through — prevents fire spread through the building

Fire-stopping is the sealing of any gap or penetration in a fire-resistant building element (fire-rated wall, floor, or ceiling) where services pass through. Failing to reinstate fire-stopping after installing pipes or cables creates pathways for fire and smoke to spread.

What is meant by 'compartmentation' in fire safety for buildings?

Answer: Dividing a building into fire-resistant sections that contain fire and smoke to the area of origin, giving occupants time to escape

Fire compartmentation divides a building into fire-resistant sections (compartments) using fire-rated walls and floors so that fire and smoke are contained in the compartment of origin for a defined period, allowing safe evacuation and limiting damage.

What daily construction site task helps prevent arson?

Answer: Securing the site properly at end of shift — removing combustibles from open areas, locking gates, and ensuring lighting deters intruders

Arson is a significant cause of construction site fires. At the end of each shift, combustibles should be secured, skips positioned away from the building, access points locked, and lighting adequate to deter intruders. Good housekeeping reduces arson risk.

What hazard do LPG cylinders present on a construction site?

Answer: Fire, explosion, and BLEVE (Boiling Liquid Expanding Vapour Explosion) if cylinders are heated or involved in fire

LPG cylinders are highly flammable and pressurised. In fire conditions, a cylinder can undergo BLEVE (Boiling Liquid Expanding Vapour Explosion), releasing a massive fireball. Cylinders must be stored outside in secured upright cages, away from ignition sources.

What must a specialist contractor do before working in a building with fire-resistant ductwork?

Answer: Check the fire safety strategy to ensure their work will not breach fire damper or duct fire resistance specifications

Before working on or near fire-resistant ductwork, contractors must check the fire safety strategy to understand the fire resistance specifications. Work must not compromise fire dampers, intumescent collars, or the fire resistance rating of the ductwork system.