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SOSS now offers a complete line of firerated
invisible hinges. Whatever the door
or opening, there is a SOSS hinge for you.
Whether your doorway is made of wood or
metal, rated 20 minutes or 3 hours, there
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now is a SOSS fire-rated hinge that will
comply and still give you the “uniquely
invisible” hinge that you expect from SOSS.
The chart below lists the SOSS Invisible
Hinges that are currently available.
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| Hinge No. |
Description |
Door Material |
Rating Minutes |
Min. Door Thickness |
218FR
220FR
418
418SS
420
420SS
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#218 hinge with UL Rating
#220 hinge with UL Rating
Similar to #218, but made of alloy steel
Similar to #218, but made of stainless steel
Similar to #220, but made of alloy steel
Similar to #420, but made of stainless steel |
wood/metal
wood/metal
wood/metal
wood/metal
metal
metal |
20/20
20/20
90/180*
90/180*
180
180 |
1¾"
2"
1¾"
1¾"
2"
2" |
*The #418 SOSS hinge is for use on 90 minute wood faced doors constructed to Georgia Pacific specifications utilizing 2" No. 10 screws; the
hinge style must be a minimum of 2-3/16" wide. This may be made up from two pieces of 1" firestop and 3/16" of wood.
Note:
SOSS Invisible Hinge product specifications available upon request.
Never exceed maximum door size of 4' wide by 8' tall for fire rated
doors only.
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Special door and jamb preparation is required
for all fire-rated hardware.
#420 The SOSS Invisible #420 Hinge is
specifically designed with square edges for
metal doors.
The Underwriters Laboratories labeled #420
SOSS Invisible Hinge can be used on hollow
metal, sheet metal, tin clad and steel composite
swinging type fire doors and frames rated up to
and including 3 hours. Additionally, they can
be used on wood core doors and frames rated
up to 20 minutes.
Use at least one fire-rated hinge for every 20"
of door height or portion thereof, or one hinge
for every 60 lbs. or fraction thereof, whichever
calculation demands more hinges. They are not
to be used on a door that normally is held open.
#418 The Underwriters Laboratories labeled
#418 SOSS Invisible Hinges can be used on
hollow metal, sheet metal, tin clad, and steel
composite swinging type fire doors and frames
rated up to and including 3 hours. They also
can be used on wood core doors and frames
rated up to 20 minutes.
Additionally, they can be used on wood/
plastic composite doors and frames
constructed with Georgia Pacific FSM-1
or FSM-2 banding for a rating up to and
including 90 minutes.
Use at least one fire-rated hinge for every 20"
of door height or portion thereof, or one hinge
for every 60 lbs. or fraction thereof, whichever
calculation demands more hinges. They are not
to be used on a door that normally is held open.
#218FR and #220FR The Underwriters
Laboratories labeled #218FR and #220FR
SOSS Invisible Hinges can be used on hollow
metal, sheet metal, tin clad, steel composite or
wood core swinging type fire doors and frames
with 20 minute ratings.
Use at least one fire-rated hinge for every 20"
of door height or portion thereof, or one hinge
for each 60 lbs. or fraction thereof, whichever
calculation demands more hinges.
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