Principles Of Means Of Escape Flashcards
What angle do fire exits have to be greater than to count as more than 1?
45
Name 3 methods for protecting an inner room?
Vision panels
Automatic fire detection
500mm between partition wall and ceiling
Maximum number allowed in an inner room
60
3 Methods for protecting dead end corridors
30 minute protection
Automatic fire detection
Stop it being a dead end (add an escape)
What distance does a corridor that provides access to 2 storey exits have to be before it needs to be sub divided?
30 meters
Fitted with a self closer
2 rules for unprotected stairwells
Once a person has entered a protected staircase they should be able to exit the building without leaving that staircase.
If a building serves more than 60 persons it should be served by more than 1 stair.
2 times an unprotected stairwell is acceptable?
Travel distance from the remotest part of the upper floor to a final exit does not exceed travel distance for single direction of travel.
Any part of the premises served by the single stair does not exceed 60 persons
2 design features of a protected stairway
Separated from the rest of the building by 30 minute FR
Leads to a final exit or provides alternative routes at the base separated by a line of FR
4 things permitted within a protected stairway
Toilets
Lift well providing it is not a fire fighting stair
A reception less than 10m2
Cupboards enclosed in FR (if it is not the only staircase)
What is needed if a stairway that serves upper floors extends to the basement?
2, 30 min fire doors
Or exceptionally 1, 60 minute fire door
What is the distance of fire protection required around an external fire escape?
1.8 meters horizontally
9 meters vertically below and 2 meters above treads
Windows also need to be fixed shut
Doors fitted with self closers
Spiral and helical stairs cam be used as means of escape when?
5 points
No greater than 9m in height Not less than 1.5 meters width Have a continuous handrail Are designed for the purpose Conform to BS 5395-2
