PSX_35_Fire 4 Flashcards
Sprinkler head types:
Suspended under a pipe, typically seen in lay in ceiling systems
Pendant
Sprinkler head types:
Sit on top of the pipe directly under the structure where combustion gases are likely to form
Upright
Sprinkler head types:
Located in small rooms that usually only require one head
Sidewall
Sprinkler heads must be replaced regardless of type:
After Being activated
Glass bulb color/temperature code:
Orange/red
135° – 170°
Ordinary temperature
Glass bulb color/temperature code:
Yellow/green
175° – 225°
Intermediate
Glass bulb color/temperature code:
Blue
250° – 300°
High
Glass bulb color/temperature code:
Purple
325° – 375°
Extra high
Glass bulb color/temperature code:
Black
400° – 650°
Extra and ultra high
Used when water damage might be bad for the room
e.g.: computer rooms
Halon
Used where are flammable liquid fires might occur
e.g.: industrial buildings, aircraft hangers
Foam
Material expense rapidly when exposed to heat insulating the surface
Intumescent paint/call/putty
Fire extinguishers:
Ordinary combustible’s (paper, wood, cloth), contains water or water-based agents
Type A
Fire extinguishers:
Flammable liquids (gas, paint, solvents,), contains smothering types of chemicals (carbon dioxide, foam)
Type B
Fire extinguishers:
Electrical equipment, contains nonconductive agents
Type C
Fire extinguishers:
Combustible metals, matched with the fire they might be used on
Type D
Fire extinguishers:
Combination of ordinary combustible’s, flammable liquids, electrical equipment
Type ABC fire extinguisher or
Types of fire detection:
Used for incipient state.
– Have two chambers: reference and a measuring
– Small amount of radioactive material ionizes the air between the charge services in each chamber which results in current flow
– When combustion particles enter the detector, it impedes the flow which sets off an alarm
– Replaced every five years because radioactive material deteriorates
– Activities in paint booths, welding shops, areas with open flame, etc. The stuff in the air so wouldn’t work so well
Ionization detector
Types of fire detection:
– Used to detect a smoldering stage
– Reacts to visible smoke that blocks a beam of light
– Can measure large volume of air
– Are useful when potential fires may produce a lot of smoke before bursting into flame
Photoelectric sensors
Types of fire detection:
– Are used during flame stage
– Activated by temperature rise, and flames must be present before the alarm temperature is reached
Heat actuated sensors
Required near fire doors, exit quarters, individual hotel rooms, bedrooms, and places of public assembly:
Fire detection
Can be attached to system activated dampers, exhaust systems, and/or notify a central monitoring station and the fire department
Fire detection
Types of fire alarm:
Sounds alarm just inside the building
Protected premises
Types of fire alarm:
Local with a direct connection to municipal fire alarm box
Auxiliary
Types of fire alarm:
Direct connection warning to a remote location like a police department or alarm monitoring company
Remote Station
Types of fire alarm:
Warns to a central station located on site that monitors multiple buildings
Proprietary
Types of fire alarm:
Miller to proprietary except that equipment is owned and operated by a service company
Central Station
Types of fire alarm:
Supervised, owned and operated by a city or town
Municipal
Sprinkler requirements per occupancy:
Always
Group H
High hazard occupancy
Sprinkler requirements per occupancy:
Wherever occupancy occurs
Group I
Institutional occupancy
Sprinkler requirements per occupancy:
12,000 ft.² or more.
Building more than three stories in height.
All floors including mezzanine greater than 24,000 ft.²
Group F
Industrial occupancy
Sprinkler requirements per occupancy:
20,000 ft.² or more
Exception: classroom at grade with at least one exit
Group E
Educational occupancy
Sprinkler requirements per occupancy:
12,000 ft.² or more
Group A1, A3, A4
Assembly occupancy
Sprinkler requirements per occupancy:
5000 ft.² or more
Group A2
Assembly occupancy
Sprinkler requirements per occupancy:
1000 ft.² or more
Group A5
Assembly occupancy
Sprinkler requirements per occupancy:
12,000 ft.² or more
Floor area located more than three stories above grade.
All floors including mezzanine exceeding 24,000 ft.²
Group M
Mercantile occupancy
Sprinkler requirements per occupancy:
All areas.
Group R1
Residential occupancy
Sprinkler requirements per occupancy:
12,000 ft.² or more
Building more than three stories in height of floors including mezzanine greater than 24,000 ft.²
Group S1
Storage occupancy
Sprinkler requirements per occupancy:
All enclosed parking garages including those under our three that are one or two family townhouse occupancies
Group S2
Storage occupancy
The maximum occupant load in any occupancy for one exit is
49 people
Maximum travel distance for exit access:
200 feet in non-sprinkler buildings
250–300 feet in sprinklered buildings
Dead ends are limited to:
20 feet,
or unlimited in length if the length is less than 2.5 times the width.
Exit stairs that can exit through the vestibule or quarter adjacent to an exterior exit are maximum of
50% of exit stairs
A two-story building accessible to the public must have more than one exit stair.
Max separation sprinklered/non-sprinklered building is:
200’ max separation sprinklered bldgs.
150’ max separation non sprinklered bldgs.
Fire exits must:
– Be located at least half of the longest diagonal distance apart
– Be smoke-free
– Empty into a safe space
– Not cross a smoke-filled space
– Get people out in a safe and timely manner
