TB 54 - Illegal Mezzanines Flashcards
A mezzanine or mezzanine floor is an intermediate floor placed in any story or room.
When the total area of any such mezzanine floor exceeds _____ percent of the total floor area in that room, it shall be considered as constituting an additional “story” in the building.
33-1/3%
The clear height above or below a mezzanine floor construction shall be not less than ______ feet.
7 ft
There shall not be more than ____ levels of mezzanines in a room.
However, there is NO LIMITATIONS on the NUMBER of mezzanines within a room.
2 levels
The aggregate area of mezzanines within a room shall not exceed _____ the area of the room in which they are located.
one-third the area
The side of the mezzanine which is open to the room shall be unobstructed except for columns, posts and protective walls, or railings not more than ____ inches in height.
42 inches
Normally, mezzanines shall be open on all sides to the room in which they are located.
However, mezzanines having ____ or more exits need not open into the story in which they are located, provided at least one of the exits gives direct access to a protected exit corridor.
2
TWO EXITS shall be provided from mezzanines having an occupant load of more than _____ or when the area of the mezzanine exceeds _______ square feet, whichever is the more restrictive.
-10
-2,000 sq ft
True or False?
A fully sprinklered building must have sprinklers installed above and beneath any mezzanine
True
The firefighting concerns dealing with the legality of mezzanines are?
- Has it been constructed legally with Dept of Building and Safety?
- Are there sprinklers above and beneath the mezzanine?
- Are there overloaded storage conditions that may lead to premature collapse under fire conditions?
For sprinklered buildings without sprinklers extending beneath the mezzanine, a notice shall be issued directing the RP to __________ and notification shall be made to the Fire Prevention Bureau
remove of all combustible materials beneath the mezzanine
For mezzanines which DO NOT appear to be adequate to SUPPORT the WEIGHT of storage, a Fire/Life Safety Violation Notice requiring “_______” compliance shall be issued for removal of storage to a weight which is a safe structural load; and NOTIFICATION shall be made to the Fire Prevention Bureau.
-forthwith (immediate)
Questions concerning mezzanines may be telephoned to the __________ Unit of the Fire Prevention Bureau.
North Industrial and Commercial Section
Partitioning may be installed, provided the aggregate floor area of the enclosed space does not exceed _____ percent of the area of the mezzanine or have an occupant load exceeding ______, whichever is greater.
10%
10
The construction of a mezzanine shall be consistent with the requirements for the type of building construction in which the mezzanine is located, but the fire-resistive time period need not exceed ______ for unenclosed mezzanines
one hour
