Multiple Dwelling /Class 2 Flashcards
10-77 required in CLASS 2/FIRE RESISTIVE BUILDINGS
CLASS 2 design features may be found in commercial buildings, public buildings and even small non fp
Majority 8-18 stories / up to 32 floors with a SINGLE STAIR
Non combustible structural elements such as steel /concrete with some interior wood framing and flooring
-building sizes vary 45’x45’/ 200’ x 250’
Horizontal BANDS or BELT COURSES (while not always present) will typically indicate one of these buildings
Location of band or belt:
–usually present above 1st, 2nd, 3rd floors–maybe only 1 or any combination of these floors
- USUALLY present below windows of any of the TOP 3 FULL FLOORS (any combination ), these bands may be on OTHER Floors as well
- the LOWER one, two or 3 floors may have a DIFFERENT COLOR OR TYPE OF BRICK OR BE CONSTRUCTED OF LIMESTONE BLOCK
**PRESENCE OF HORIZONTAL BANDS OR BELT COURSES IS SINLGE BEST CHARACTERISTIC DESIGN FEATURE TO IDENTIFY THESE BUILDINGS…DESIGN FEATURE WILL BE PRESENT ON BUILDING WALL FACING THE STREET (non street facing wall typically uses plain brick)
this design feature may also be present on later built CLASS 1 HIGH RISE RESIDENTIAL
-use design feature and CIDS to determine building type
- these buildings will have INTERIOR WOOD FRAMING AND STEEL CHANNEL RAILS (may be frame out with wood )
- poorly stopped openings/renovations
- DUMBWAITER SHAFTS /COMPACTOR CHUTES
CLASS 2 high rise building contain various occupancies, majority is CLASS A MULTIPLE DWELLINGS (AKA FIREPROOF TENEMENT HOUSES)..other occupancies included hotels, SRO, students housing
- duplex/triplex
- two or more apt combined
- some may have 30 or more rooms/thousands of square feet
- 2 apts. made from one large apt.(apt. service entrance will be in vicinity of kitchen)..apt. service entrance may also lead to hallway or vestibule leading to kitchen smaller rooms( originally living quarters for staff)
Features:
- wings /sections
- some building single stair…some open/ some open and enclosed
- fire escapes may or may not be present
- standpipes- older installations/unusual locations
- elevators - some may not provide access to stars or standpipes
Wings/sections..
- -divided into wings ABOVE 1ST FLOOR
- wings will have own standpipe, stair, elevator
- most buildings, only way to transverse wings is the LOBBY , CELLAR/ROOF
- sometimes have SHARED FIRE STAIR allowing access to different sections above the first floor
FIRE STAIR
- acts essentially as a fire escape inside of the building
- separate fire rated enclosure (terra-cotta, cement block, non combustible material )
- entry may be in lobby/street or cellar
- terminate at roof bulkhead or penthouse terrace
- many times these stairs are accessed through an apartment (occasionally accessed off public hall )
ENCLOSED STAIR..
-separated from an apartment door by a FIRE RATED DOOR TWO TYPES: 1. stairway of standard width separated from all apartments via FIRE RATED DOOR leading to a public hallway or vestibule ...may or may not contain a standpipe ..found in newer class 1 high rise res.
- ENCLOSED FIRE STAIR ..- a fire stair separated from all apartments via a fire rated door leading to public hall or vestibule , usually does not contain s standpipe , may be located off the main public hall or accessed through and apartment
OPEN STAIRS..
-any stairway where there is no fire rated door between the apartment door and the stair
5 most common types:
1. service stair -usually contains standpipe, service elevator and doors to apartments …these doors are typically NOT the main entrance to the apt.
- Primary open stair-used as primary stairway , usually leads to front entrance doors of apartment..resemble typical open stairs found in a tenement …usually end at bulkhead on roof, but occasionally terminate on top floor
- OPEN FIRE STAIR - open fire stair generally have 2 doors serving separate apartments in a building or wing of a building …some contain only one door serving single apartment ..typically do not have standpipe..MOST COMMON STAIR ENCOUNTERED
- shared fire stair - shared by apartments in 2 separate wings…creating additional crossover and potential for fire/smoke spread
- Stair separated from the public hall or vestibule that also contains one or more apartment doors in the stairwell ..usually secondary means of egress from the apartments, however, rare exception is the only door to apartment /room…may contain standpipe
**stairways may NOT BE LABLED **
FIRE ESCAPES..
- may or may not have fire escapes
- some may have fire escapes serving one line, one area or one apartment
- may be 18 floors or more in heigh
- NOTIFY COMPANY OFFICER PRIOR TO USING FIRE ESCAPE
STANDPIPES..
- may be round in public halls /stair landings
- various heigh of outlets , over 7 feet high
- may be difficult to remove PRD
- may have no section valve or riser control valve present
- stretches may be 4 lengths or more
Elevators.
- may be small and OPEN DIRECTLY INTO APTS
- SERVICE ELEVATORS OFTEN PROVIDE ACCESS TO STANDPIPE AND STAIR AREAS
- SERVICE ELEVATORS MAY NOT HAVE FIREMAN SERVICE (mentioned in LOFTS)
IF MEMBERS encounter occupants evacuating from upper floors, these occupants should be instructed to REMAIN IN THEIR APARTMENTS, with their doors closed…if removal is necessary (overcome, panic), COMMUNICATE WITH IC AND 1ST TRUCK OFFICER
1ST ENGINE/1ST LADDER must communicate to ensure all members on the scene are aware of which entrance door operations are being conducted from (apartment entrance door…lots of time there are 2 doors )…communicate to IC/FIRE SECTOR, all members on fire floor and floor above
-apt below may be needed to flake out line or STAGE UNITS
IF buildings contains open and enclosed stairs, consideration give to leaving ENCLOSED STAIRS FOR EVACUATION WHEN POSSIBLE , this may include connecting to standpipe in enclosed stair on floor below, and then using open stair to attack fire .
2 1/2” from standpipe outlet or 2 1/2” from APPARATUS
- difficulties with removing PRD, etc. ..must be communicated to 1st engine/1st ladder
- more than 3 lengths of hose may be required, enter into CIDS
1ST AND 2ND ENGINE OPERATE TOGETHER.
AS PER HIGH RISE MD.
3RD ENGINE MAY NEED TO ASSIST WITH 1ST LINE (notify IC AND 4TH ENGINE OFFICER )
- typically 3rd and 4th team up
- if a second apartment entrance is present and the 1st line may be endangered by fire venting from this door, second line may need to be stretched to this location to protect the advance of first line
5th engine
HIGH RISE NOZZLE