Chapter 6: Features of Fire Protection Flashcards
Fire resistance rating
determines the time a material remains structurally stable when attacked by fire
Inherent fire resistance
flame resistance derived from an essential characteristic of the structural member
Standard time temperature curve in test standards
the profile of the furnace temps that are dictated by the test standards
Steiner Tunnel Test
Class A:
Class B:
Class C:
Class A: 0-25
Class B: 26-75
Class C: 76-200
Critical radiant flux
a materials ability to resist flame spread
Carpet Test
Class I:
Class II:
CRF minimum >.45watt/sqcm
CRF minimum > .22 watt/sqcm
Fire barriers
1-2 hours, used to enclose shafts, exit stairwells, exit passageways, horizontal exits
Two types of door closure devices
Self closing & automatic
Wet pipe systems
containing water under pressure at all times
Dry pipe systems
contains air under pressure
Pre-action sprinkler system
fire detecting device actuates the control valve
Deluge system
all sprinklers open at all times
Standpipe system classes
Class I: 250 gpm, 100psi, 2 1/2 in hose connections Class II: 100 gpm, 65psi, 1 1/2 in hose stations Class III: 250 gpm, 100psi, 1 1/2 in hose stations & 2 1/2 hose connections
Automatic wet standpipe system
wet system capable of supplying system demand automatically
Semiautomatic dry standpipe system
dry system, arranged through a device to admit water into a system
Manual dry standpipe system
dry system that does not have permanent water supply attached
Manual wet standpipe system
connected to a small water supply to maintain water within the system, not capable of supplying system demand.
Spot type smoke detectors
Ionization and photoelectric
line type smoke detectors
covers an area, projected beam detectors
Smoke control
pressurization to prevent movement into protected areas
Purge smoke management
venting of smoke
Zoned smoke control
combination of pressurization and venting
Air flow smoke management
use of high air velocity to stop smoke movement
Clean agent system
gaseous fire extinguishing agent, no residue
Water mist system
atomizing media
