Mich. Admin. Code R. 400.4555 - Smoke barriers
Rule 555.
(1)
Smoke barriers with a 1-hour fire resistance rating shall be provided on each
floor used for sleeping rooms for more than 24 residents and shall be so
located as to form an area of refuge on either side that is served with an
approved means of egress. The barriers shall be located as close as possible to
the middle of the floor to be protected and shall extend from outside wall to
outside wall and from the floor through any inter-stud spaces to the roof or
floor structure above.
(2) Doors in
the smoke barrier shall be at least 20-minute fire-rated door or 1 - inch solid
core flush door hung in labeled frames with self-closing devices. Where double
doors without mullions are used, synchronizing hardware and astragals shall be
installed and maintained regularly. For new construction, additions and
conversions these doors shall be arranged so that each door swings in a
direction opposite from the other.
(3) Doors in smoke barrier partition may be
held open only by electric hold-open devices designed so that interruption of
the electric current or actuation of the fire alarm, sprinkler system, or the
heat or smoke detector will cause the release of the doors. The doors shall
also be capable of being opened and closed manually.
Notes
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