13
Smoke Seal Labels
Some doors, regardless of pressure
requirements, may also require a smoke seal
(“S”) label. This label indicates that the installer
is required to apply a category “H” gasket to the
frame. Please specify, if required.
Self-Closing
Fire doors must self-close and latch unaided
using a door closer or the correct self-closing
hinges. See
page 20
for more information.
Self-Latching
Fire doors must have a labeled automatic
latching device to engage the strike. Lockset
hardware with a latch bolt or a panic device with
a latch bolt are required.
Deadbolts can’t be used in place of a latch
bolt, but can be used in addition to a latch bolt,
except on egress doors. See
pages 19-20
for
more information.
Door Unit vs Wall Fire Ratings
Commercial codes typically require that door
units be rated for three-fourths of the rating of the
surrounding wall. For example: a three-hour door
is used in four-hour rated wall; a 90 minute door is
used in a two-hour rated wall; and a 45 minute door
is used in a one-hour rated wall.
Adding a Lite to a Fire-Rated Door
Adding a lite over 100 square inches to a fire-rated
door will decrease its rating by 50%. For example:
a 24”x30” or commercial half-lite installed in a 90
minute fire-rated door will result in a net fire-rating
of 45 minutes.
