Floors, walls, ceilings and other elements and
components required to develop a fire-resistance rating shall be maintained
so that the respective fire-resistance rating of the enclosure, separation
or construction is preserved.
All required fire-resistance-rated doors or
smoke barriers shall be maintained in good working order, including
all hardware necessary for the proper operation thereof. The use of
door stops, wedges and other unapproved hold-open devices is prohibited.