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Arson Offences CIB 012 > Powers and Fire > Flashcards

Flashcards in Powers and Fire Deck (11)
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Natural Causes of Fire

- Sun's rays
- Lightning
- Static electricity
- Rodents eating through wiring or making nests out of flammable material
- Spontaneous combustion and ignition of things like hay or wool, turpentine or paint, dust in factories


Powers of Fire Service Staff

S28 Fire Service Act 1975

- Enter private property when it is on fire or endangered or when entry is essential to perform a a necessary duty
- Close roads
- Remove vehicles impeding the fire service. Can break into the vehicles for that purpose
- Remove people who are in danger or interfering with operations, using reasonable force if necessary
- Do anything else that is reasonably necessary for the protection of life and property

Fire service can call upon Police to exercise these powers


Incendiary and Explosive Devices

- Candles
- Chemical Ignitors
- Electrical apparatus
- Electric matches
- Matches and cigarettes
- Molotov Cocktails
- Timing devices
- Trailers


Effect of Fire on:

Timber - Burn and char, Stable if thick enough

Steel - Expand and eventually collapse

Concrete - Spalling (break away at surface), expose steel reinforcing, subject to collapse - affected by extremely low fire temps.

Masonry - Weaken the mortar, expand, collapse



Process of combustion, chemical reaction between fuel and oxygen, triggered by heat.


Point of Origin

Exact location at which:
- A component failed
- A fire was maliciously lit
- An accidental fire originated


Difference between Gas Explosion and Explosives

Explosions caused by gas generally cover a wider area than those caused by explosives, and they do not leave a crater.

Lighter-than-air gases such as hydrogen will create an outward blow at the top of a wall, whereas heavier-than-air gases blow out at the bottom of a wall.

There are a number of other tell-tale signs, such as the implosion of cabinets, which will be obvious to the expert.


Providing explosives to commit an offence

Section, elements

S272 CA61

Everyone is liable to a term of imprisonment not exceeding 2 years who knowingly has in his or her possession or makes any explosive substance, dangerous engine, instrument or thing, with intent to enable another person to use the substance, dangerous engine, instrument or thing to commit an offence


Building explosive - what must prosecution prove?

R v Hallam

R v Hallam

On a charge of knowingly having possession of an explosive substance, it must be proved that the offender knowingly had the substance in his possession and also that he knew it to be an explosive substance.


Police Powers

Section 32 of Fire Service Act 1975
Only if called upon by Fire to do so can not exercise the right because just present.


Injuries through Hazards

Inhalation of toxic substances
Ingestion of particles
Cuts/wounds from sharp objects
Air borne dusts, particles
Tripping on fire debris
Falling down, over, onto, into any obstructions or cavities.
Items from above falling onto you or hitting objects causing a chain reaction.