Access Panel: An opening in a ceiling for
access to tension adjusting wheel
and to drive mechanism (motor, crank, chain
hoist). Furnished by the ceiling or General
Contractor.
Adjusting Wheel:
See Tension Wheel.
All Weather Doors: A rolling service door
having all the weather-stripping features, consisting
of guide weather-stripping, hood baffle and bottom
astragal.
Astragal: Neoprene or vinyl weather-stripping
added to the bottom bar to seal opening along the
floor or to protect a finished surface.
Automatic Closing: Mechanical, self-closing
device of a fire door upon melting of a fusible
link, or activated by smoke detector or alarm system.
Backroom: Amount of clear unobstructed
space extending back from the face of the wall.
Barrel Assembly: A steel tube or pipe that
spans between the door brackets and contains the
springs required to provide counterbalance and
lifting capability. The curtain coils up around
the barrel.
Barrel Ring: Stamping or casting, attached
to counterbalance pipe or barrel, which is used
to increase the curtain wrap diameter and which
is attached to the curtain top slat.
Bar Stop: See Wind Bar.
Base Plate: Optional steel plate mounted
under the tube support to help transmit weight
of tube and product on floor.
Bellmouth: Flared upper portion of guides
to ease entry of curtain into the guides.
Between Jamb Mounted: Type of mounted
where the guides are positioned between the mounting
surfaces and not on the surface (interior
or exterior) of the wall. Guides are generally “packed
out” mounted to the inside of jamb and hood
below lintel. Clear opening size will be reduced
and may require “fascia” to close
off back of hood.
Bottom Bar: A reinforcing member at the
bottom of a curtain; generally either
two angles back-to-back forming an inverted “tee” or
an extruded aluminum member. Serves
to add lateral strength to door, to add weight
to help curtain close, to act as an obstacle
to stop door when fully open, as a stop plate,
and to hold weather-stripping.
Bracket Plates: End supporting plates for
the barrel counterbalancing assembly and to house
coiled curtain. One plate is the drive (chain hoist,
crank or motor side) plate, the other is the tension
(spring adjusting side) plate. Each bracket plate
is generally supported by the wall angle of the
guide assembly.
Brush Seals: Term used to refer generically
to the use of brush filament material either in
use as a weather-seal or when used as smoke seals
for smoke and fire doors.
Brush Weather-stripping: Weather-stripping
for use on all configurations of
doors to close the gaps at jambs and header.
Brush material can be UL listed for “fire door” use.
Cable Sensor Edge: An edge that uses two
cables inside a standard neoprene loop astragal.
Upon connection with motor operator, a sensing
field is established between the two cables. Any
disturbance to this field causes the motor and
door to stop and reverse (or stop).
Chain Hoist: A mechanical device to assist
in raising and lowering the door by use of hand
chain and gear or sprocket reduction.
Charge Pin: A metal pin used to lock tension
wheel after proper spring tension is applied.
Charge Wheel: See Tension Wheel
Counter Shutter: A door used to close an
opening which includes a counter-type sill.
Counterbalance: A system of springs or
weights to provide the amount of force needed to
raise the door and maintain it in the open position.
Curtain: The part of the door that actually
rolls up and down, or slides side to side. It may
be manufactured of slats and/or rods and links,
endlocks and windlocks.
Cycle: An action on the door from the fully
closed position, to the fully open position, and
returned to the fully closed position.
Cylinder Lock: Key-operated locking device
located on the bottom bar.
Door/Grille Combo: Combined assembly of
a rolling service door and a rolling grille door
sharing guides and common bracket plates. Allows
full security when required and ventilation with
door open and grille closed.
Double Throw Lock: Center locking device
that throws a locking bar into both guides, mounted
on bottom bar.
Drive Gear: Large gear for chain- or crank-operated
units. It is directly fastened to the door shaft
on the drive side bracket plate.
Drive Plug Assembly: See Plug End
Drive Shaft: The shaft in the barrel that
is securely attached to the barrel, through welding
or pinning. When this shaft rotates the barrel
should also rotate.
Dropout: Weighted mechanical device for
disengaging gearing or motor operator for rolling
fire doors. Also used to activate closing spring
and to release governor in case of fire.
Drop Test: Test performed on a fire door
to ensure proper operation during
emergency.
Testing is required to be performed
annually (see NFPA 80).
“E” Guides: Common expression
for the shape that guides form when they are mounted
to steel jamb supports or frames.
Electric Sensor Edge – See Sensing
Edge.
Electromechanical Release: A device, which
holds the auto, close device until it is released
by a signal from an alarm or detection system.
If power fails the device also releases. There
are a variety of types and manufacturers. Most
have a time delay before release to prevent nuisance
releases.
Emergency Electric Operation: Any rolling
door with a motor and an Uninterruptible Power
Supply (UPS) capable of opening and closing the
door several times while facility line power is
off.
Emergency Release Device: Permits emergency
egress (exit). Normally furnished
on grilles in Malls/Shopping Centers
where building codes dictate. Device allows manual
operation of the door without electrical power
to open.
Endlocks: Steel stamping or malleable
iron castings which are riveted to
curtain slats ends every other slat
to prevent slats from shifting laterally, and
to provide curtain wearing surface in guides. “ Alternate
endlocks” are
at both ends of every other slat,
commonly for service and rolling
fire doors. “Continuous
endlocks” are both ends of every slat.
Endplates: See Bracket Plates.
Exterior Mounted: Condition where door
is mounted on exterior surface exposed
to weather and wind load. Usually requires “exterior
hood” and “gear covers”.
Face of Wall: Door mounting condition
where guides mount directly to wall,
and side clearance is allowed for tension wheel
and drive mechanism.
Fascia: Metal closure for back of door
housing. Required when there is only
a partial or no header in place and
back of door coil is exposed. Required when the
wall above header is not full thickness of jamb
(prefab building).
Fenestrated Slats: A curtain with holes
or slots in slats to allow air filtration
Fire Door: A door that has a fire protection
rating and will close the floor automatically in
case of fire.
Fire Shutter Door: A door that has a fire
protection rating and will close to the floor or
counter top automatically in case of fire.
Flame Baffle: Hinged metal shield released
by a fusible link inside a fire door hood.
Fuse Link Housing: Box in which fusible
links are sometimes furnished when rolling fire
doors are mounted above ceiling to provide a finished
exposure are in ceiling for link.
Fusible Link: Two metallic pieces that
are joined together by low temperature alloy. When
the ambient temperature exceeds that of the alloy
the connection melts and the pieces separate. These
are used to release holding chains or cables that
maintain a mechanical fire door release system.
The most common temperature for a fire door is
165 degree F.
Gear Cover: Metal cover protecting the
drive brackets to control rate of descent of rolling
fire door when released in the event of fire.
Governor: Device on rolling fire door drive
mechanism from weather and debris.
Grille Door: An upward acting rolling gate-offering
security without loss of visibility or ventalation.
Widely used in shopping malls and parking areas.
Guide Assembly: Consists of two or more
angles or a roll-formed channel to create a groove
in which the rolling curtain moves up and down.
Guide Standout: The distance that face-mounted
guide assembly extends from wall face.
Guide Weatherseal(1 seal): A strip
of weather-stripping material that is attached
to the exterior guide angle and designed to compress
against the exterior surface of the curtain slats.
The material may be vinyl, neoprene rubber, or
brush filaments.
Guide Weatherseal (2 seal): The weather-stripping
material is applied on both the exterior and interior
guide angles and is designed to compress against
both the interior and exterior curtain surfaces.
Gussets: See Bracket Plates.
Hand of Operations: The side on which the
door operation mechanism is placed, as viewed from
the coil side of the door. It is either an RH or
LH operation,
Header Seal: Weather-stripping mounted
to opening header to seal the opening between header
and curtain, sometimes used where hood baffles
is ineffective.
Headplates: See Bracket Plates.
Headroom: Amount of clear unobstructed
space above the door lintel or header.
Helical: It means a spiral, and is a term
referring to the type of torsion spring used in
the spring counterbalance.
Hogh Cycle Design: Door Components and
operator designed for a fixed number of cycles
for a specific period of time.
Hood: Metal cover that conceals the doors/grille
coil and is attached and supported by headplates
and intermediate hood supports (if required).
Hood Baffle: A flap of material secured
to the interior of the door hood, resting on the
curtain roll and designed to retard air infiltration
over and through the hood.
Housing: See Hood.
Inertia Brake: A unit that is attached to the
door shaft and headplate or wall, which will stop
the door from free falling should there be a failure
in the motor operator brake, roller chain drive
or torsion spring assembly. When the shaft is moving
at a certain RPM the unit will lock up the shaft,
preventing it from moving until door can be repaired.
Initial Charge: See initial Turns.
Initial Turns: Amount of turns of the tensions
shaft to apply spring tension from zero with the
door in the fully open position. These turns provide
the minimum moment or force to hold door in the
open position.
Inset: See Setback.
Inside Adjusting Wheel: See Inside Tension
Wheel.
Inside Tension Wheel: Spring adjusting
wheel located inside bracket plate
so that no additional sideroom is
required beyond the guide.
Interlock, External: An electrical switch
to prevent motor operation if locking device is
not first disengaged. Not to be confused with interlock
of emergency hand chain operator.
Intermediate Hood Support: A rigid member,
which is contoured to the shape of the hood and
mounted to the wall, between the headplates. The
hood is then attached to the support to give the
hood rigidity.
Jamb: A vertical member at either side
of a door or window frame.
Jamb angle: An angle of the guide assembly
in which it attaches to the inside of jamb and
supports the load of the door assembly.
Jamb Load: Force exerted on jamb by guide
assembly when curtain is subjected to wind load.
Label Size: the largest size of a fire
door or fire shutter assembly fire proven by test
to meet a specific fire rating.
Lift Handle: A handle supplied on manual
push-up doors, to assist in raising and lowering
the door.
Magnetic Release: Device connected to a
smoke detector or alarm system, that on either
an interruption of electrical power or applied
signal will release the automatic closing device
of a fire door or fire shutter.
Manual Override: Means of operating a motorized
shutter by manual operation in case of power loss.
Master Keying: Arrangement whereby cylinder
can be opened or locked by means
of one “master” key.
Motor Cover: Metal cover to protect the
motor from exterior weather, debris, or to meet
OSHA safety requirements.
Mullion, Motorized: A combined guide assembly
joining two adjacent rolling doors where center
guide is hinged and motorized to lift up and out
of the way, to expose a full opening width when
both doors are open.
NFPA 72, National Fire Alarm Code: Code
deals with the application, installation performance,
maintenance fire alarm systems and their components.
NFPA 80, Standard for Fire Door and Fire Windows:
Regulates the installation and maintenance of assemblies
and device used to protect openings in walls, floors,
and ceilings against the spread of fire smoke within,
into, or out of buildings.
Offset: Dimension between face of header
or jamb and centerline curtain. Required to reduce
drag of curtain on bellmouth of guides when curtain
is in a lowered position.
Oversized Label: A fire door or fire
shutter assembly that has not been fire tested,
and receives a label or a Certification of Inspection
which does not indicate that the door is capable
of furnishing “ Standard
Fire Protection”, but only that the door
conforms to the construction requirements.
Packout: Guide build-out to cleat an obstruction
or provide clearance for drive or tension mechanism
when door is between0jamb mounted.
Panic Release Device: See Emergency Release
Device.
Pass Door: Hollow –metal pedestrian
door integrated into the rolling
door, the frame of which is hinged at the jamb
so door frame swings out of the opening.
Perforated Slats: See Fenestrated Slats
Pipe Shaft: See Barrel Assembly
Plug End: Drive end of barrel assembly
driven by gear or sprocket for which the curtain
is raised and lowered. Consists of assembly of
short solid shaft and one or more round plates
welded to the shaft and pipe whith in the pipe.
Pre-Turns: See Initial Turns
Safety Stop Bearing: See Inertia Brake.
Security Chain Box: Metal enclosure that
encloses hand chain in a steel pad-lockable assembly
attached to door guide.
Sensing Edge: A device mounted on the bottom
bar of an electrically- operated door to stop or
stop-and-reverse the closing door upon contact
with an obstruction in the door opening.
Sensing Edge, Pneumatic: An air hose installed
inside the bottom bar astragal and connected to
a diaphragm switch, to signal the motor operator
to stop or stop-and reverse the door.
Sensing Edge, Electric: An electrical bottom
bar astragal enclosed with two parallel foils.
When closing door bottom bar touches an obstruction,
the foil close an electric circuit to cause the
operator to stoop or stop-and-reverse the door.
Sensing Edge, Infrared Type: Bottom bar
astragal enclosing a tube with an infrared transmitter
at one end and a detector at the other end. When
IR source is obstructed the motor operator will
stop or stop-reverse the door.
Service Counter Fire Door: A small
version of a fire door where the combined door,
still, and frame (optional) assembly has a fire
protection rating and will automatically close
to a counter top in case of fire.
Setback: A standard space where the guide
is recessed from edge of the jamb at both sides
of opening on a face of wall-mounted door.
Sideroom: Required unobstructed space where
the guide is recessed from edge of the jamb at
both sides of opening on a face of wall-mounted
door.
Slat: Cold roll-formed or extruded member
of which curtain id formed. Slats are formed so
as o interlock and form a water-shedding surface.
Slide Bolt: Locking device on the bottom
bar which slides into guide or guide shoe and is
equipped for padlocking. Mounted either inside,
outside or both sides of the door.
Slide Grille: A side-sliding grille product
the requires little headroom and no floor track.
The grill is able to follow a curved lease line
and stacks into a side pocket in the wall.
Sloped Bottom Bar: Tapered bottom bar to
match sloped sill of opening. Accomplished by inserting
a tapered plate between bottom bar angles. This
tapered plate will hang into opening on low side
unless door height is increased and coil raised
to have sloped bar cleared opening when door is
open.
Smoke Detector: A device that senses visible
or invisible particles of combustion and/or heat.
Smoke Gasketing: Brush seal used on the
for doors or fire shutters to reduce the passage
of smoke and gases.
Spot-Type Detector: A device with a detecting
element concentrated at a particular location.
Typical examples are bimetallic detectors, fusible
alloy detectors, certain pneumatic rate of rise
detectors, certain smoke detectors, and thermoelectric
detectors.
Spring Cycle Life: spring counterbalance
is designed for afixed number of cycles.
Spring Counterbalance: See Barrel Assembly.
Stand-Out: The distance that guides assembly
extends out from the wall on face-of-wall mounted
doors.
Starter, Fire Door: A mechanical device
to start the closing of door in the event of a
fire and to do it independently of the hand chain,
crank or motor operator normally used to close
door.
Starter Slats: Partial slats used to connect
curtain to barrel rings.
Stops: Bars mounted at top of guides to
prevent bottom bar from traveling out of the guides
when the curtain is fully raised.
Stop Lock Bearing: See Inertia Brake.
Tapered Bottom Bar: See Sloped Bottom Bar.
Tension Wheel: Casting, either pinned or
keyed to the spring inner shaft, with which the
counterbalancing springs are initially tensioned
or adjusted, and is used in conjunction with a
locking pawl or pin to lock adjustment.
Thru-Wall Operation: A door driven by means
of hand chain, crank or motor operator located
on the opposite side of wall.
Thru-Wall Fusible Link: Extending a fuse
linkage to the opposite side of an opening, with
respect to the side the door is mounted on. Required
per NFPA 80 for all non-exteriors mounted doors.
Thumb Turn Mortise Cylinder: Locking device,
much like a cylinder lock but does not require
a key to lock or unlock.
Torsion Spring: A helical wound spring,
commonly mounted directly into the pipe and electrically
drives the barrel assembly.
Viscous Speed Governor: Device to control
the drop rate on fire doors.
Vision Lite: A series of single cutouts
in door, glazed with clear plastic.
Wall Angle: An angle of the guide assembly,
which attaches to the face of wall and supports
the load of the door assembly.
Wicket Door: see Pass Door.
Wind Bar: channel or bar welded inside
guide groove, which engage windlocks under wind
load.
Windlocks: Malleable iron castings riveted
at predetermined intervals to slat ends to prevent
curtain from leaving guides under wind load, and
which are used in conjunction with channels or
wind bars in guides which Windload engage under
wind load.
Working Turns: The additional winding of
the springs as the barrel rotates and the curtain
closes.
