Cordons, Distances and Numbers Flashcards
If there is a risk of IEDs what are the limits on radio communications?
Hand held radios - 10m
Appliance based radio - 50m
What are the cordon distances when dealing with a suspected IED?
(a) Up to suitcase size, more than 100m.
(b) Car/light vehicle, more than 200m.
(c) HGV/lorry, more than 400m*.
* Note: If any doubt exists on size, 400m should be the minimum distance.
At what temperature do Steel and Aluminium Cylinders generally fail?
Aluminium - 200-250C
Steel 300C
What is the initial cordon for cylinder incidents?
200m
At a substation within a building, what is the minimum fire protection time?
4 Hours
What is the maximum attendance time for authorised personnel at incidents involving electricity?
2 Hours
What are the minimum distances crews can work from over head power cables?
5m - to affect a rescue
10m - when using a ladder or aerial appliance (20m training)
10m corridor - when approaching dense smoke or flames
20m - when using hand held jets
30m - when using ground or aerial monitors
What is the cordon size for a wind turbine?
300m
What is the maximum voltage for electrical gloves for a rescue?
3300V
What are the Current limits of both High and Low Voltage cables?
High - Above 1000v(ac)1500v(dc) Low - Below 1000v(ac)1500v(dc)
What are the hazardous distances of fireworks?
Propelled upto 100m
Explosion upto 100m Diameter
At what distance can Explosives with radio detonators be activated?
60m radio exclusion zone - Normal
600m radio exclusion zone - Military Grade
What are the Cordon Distances for IEDs?
200m - explosives upto 250kg (small car)
600m - explosives 251kg - 2000kg and any military grade munitions
1000m - explosives over 2000kg
What are the maximum legal explosive storage limits?
250kg - Fireworks
20kg - Black powder
What are the Bar pressures for a Gas Distribution Network? ( High pressure/Medium/Low)
85 Bar - High - NTS
25 Bar - Medium - LDZ
1 Bar - Low - Domestic
What are the Cordons for Gas leaks?
• 25 metres for public safety at a domestic
natural gas leak;
• 200 metres from a ruptured high/medium
pressure pipeline or building filled with natural gas;
• 600 metres from ruptured high/medium
where the gas jet is directed through a congested region;
• 1000 metres from a mass release of bulk storage of natural gas;
What is the minimum cordon for a Hazmat including C0 leak?
25m
Height required for a Dry Riser?
18m (DRY)
Height required for a Wet Riser
50m (WET) 60m pre 2006
What are the water requirements for Dry and Wet Risers?
DRY RISER - 1500lpm
WET RISER - 1500lpm for a minimum of 45 min
What is the minimum recommended load for a firefighter lift?
850kg
What are the recommended pressures of Wet risers?
4-5 Bar pre 2006
8 Bar post 2006
What is the height requirement for a residential High Rise to have Sprinklers?
30m after 2006
What are the inner circle and outer circle cordons at an RTC?
2m - Inner cordon
5m - outside the inner cordon
