TB 149: Residential Fire Sprinklers Flashcards
This mandate uses the NFPA ___ standard
NFPA 13D
NFPA 13D Standard includes new construction of
1.
2.
3.
- garages
- patios
- unattached structures
NFPA 13D IS REQUIRED FOR PATIOS EXTENDING ___ FT FROM HOUSES
4 FT
NFPA 13D IS REQUIRED FOR UNATTACHED STRUCTURES GREATER THAN ______.
200 SQ FT
IN NFPA 13D SPRINKLERS ARE ONLY REQUIRED IN WHAT PART OF RESIDENCE?
LIVABLE AREAS OF HOMES
WHAT ARE EXEMPT FROM NFPA 13D ?
ATTICS
OTHER COMBUSTIBLE SEALED SPACES
PROVISIONS OF NFPA 13D DO NOT APPLY TO FACILITIES/STRUCTURES THAT _______\_OR WERE _________ _\_ ______ ___________ PRIOR TO JANUARY 1, 2011
EXISTED
APPROVED FOR CONSTRUCTION
NATIONWIDE STATISTICS SHOW THAT MOST FIRES, INJURIES AND DEATH OCCUR WHERE?
AT HOME
INTERNATIONAL ASSOCIATION OF FIRE CHIEFS(IAFC) REPORT THAT APPROX ______ CIVILIANS PERISH ANNUALLY FROM FIRE
3000
International Association of Fire Chief (IAFC)report that nearly ____ of civilian death from fire occur in the Home
2/3
Residential Fire Sprinklers are primarily “_____ _______” systems with the purpose of preventing______ and improving _______ _______ _______
“LIFE SAFETY”
- FLASHOVER
- Chances of Occupant Escapes
Residential Fire Sprinkler Systems protect against fire generated from _____ ________ __________, with the objective of containing the fire to the ____ ____ ________.
SINGLE INGNITION SOURCE
ROOM OF ORIGIN
According to National Institute of Standards (NIST) a home fire can reach deadly proportions in as little as __________, with __ to ___ before first responders arrive.
3 minutes
7-10 minutes
Lightweight construction, larger homes, open spaces, fuel loads and materials contribute to what 3 things?
1.accelerated fire spread 2. shorter time to flashover 3.structural collapse.
Residential sprinkler heads are more _________ ____________than traditional heads and therefore activate at earlier stages of the fire.
heat sensitive
________ or _______are used, depending on head type for residential sprinklers
Thinner fusible links or smaller diameter bulbs
Head temperatures range from ______ to ________degrees and cover a minimum area of ___’x___’.
135 to 175 12’x12’
Extended coverage heads can cover a ___’x _____’area
20 ft x 20 ft
Who “plan checks” and “approves” the installation of residential sprinklers.
Plumbing/Mechanical Engineering Division of Los Angeles Department of Building and Safety (LADBS)
All components of the home systems are to be ___________ or ___________listed while the contractors performing the installation need to be licensed and manufacturer certified.
Underwriter Laboratory (UL) or Factory Mutual (FM)
Water supply can be obtained from a variety of sources. They include:
domestic water supply elevated tank pressure tank stored source well with an adequate pump.
Most home systems in the City are connected to the ___________ __________ ______
Domestic water supply
Piping beyond the street shut- off valve SHALL be installed in such a manner that the supply to the sprinklers SHALL …..
not be turned off when the domestic system is being serviced (domestic water can be isolated).
The valve on the street will shut off what ?
both the domestic and sprinkler water supply
Shut-off/control valves are usually located in the ___________or on ________________
Garage the side of the house
Identification signs for shut-off/control valves are required by
LADBS
the minimum size of sign and lettering for Shut-off/control valves is ____________
not regulated
though not mandatory, _______________are highly encouraged by LADBS and are installed on most residential systems.
Bell (Water Flow) alarms,
There are a variety of piping materials that can be used for residential systems. These include:
black pipe copper pipe chlorinated polyvinylchloride (CPVC) polybutylene (PB) schedule 40 steel thin walled steel.
Most all of the new systems in the City use______ due to cost, fabrication time, fire resistiveness, connectability to domestic water and less friction loss.
chlorinated polyvinylchloride (CPVC)
CPVC is a lightweight,_________ colored rigid plastic pipe.
Orange
LADBS requires a (minimum) water demand capable of flowing_____ heads for a period of______ minutes.
2 heads 10 minutes
Residential sprinkler systems in Los Angeles are usually______ systems and don’t require the use of ____________________due to our mild climate.
Wet systems Anti-freeze solutions
All piping technologies must pass rigorous _____________prior to approval for use in sprinkler systems.
fire/heat testing
Home sprinkler piping is installed in the _____
Attic
A greater vulnerability to heat is that of the piping _________ and ___________. If these components are exposed, they may loosen/expand and cause the pipe to____ or _______, reducing the effectiveness of the system.
Hangers & Straps sag or drop
residential heads are installed in ________ ________ ONLY and not in attics.
livable spaces
Residential sprinklers are not subject to ___________________and would only be inspected when construction is complete.
Chief’s Regulation No.4 testing
After the installation receives its final approval, the maintenance and operability becomes the responsibility of who?
Homeowner
Sometimes ______ ________or the sprinkler heads themselves are ________ ________which can hamper the activation of the heads.
cover plates painted over
__________ & __________can, over time, decrease pressure and volume.
Expansion of population and construction
A decrease in _________________________can occur over the years.
inside diameter of supply lines
The identification signs for shutt-off valves are inspected only at________________________, therefore might be missing, faded or covered by foliage.
the time of the final inspection
If difficulty locating the shut-off valve occurs, shut the water off where ?
at the street
A __________ ________is used for connecting the joints when Chlorinated polyvinylchloride (CPVC) being installed.
solvent cement
As of ______ __ ________ the State of California is requiring the installation of residential fire sprinklers in all new one and two family dwellings and manufactured homes.
JANUARY 1, 2011
