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Existing flue-fed incinerator rooms and associated flue shafts must be protected with 1-hour fire-resistance-rated construction and must not have other vertical openings connected with the space other than the associated flue. Opening protectives must be provided in accordance with Section 716 of the Chicago Building Code and have a fire protection rating of not less than 1 hour.
(Amend Coun. J. 2-19-20, p. 14473, Art. V, § 21)
In congregate living facilities and residential occupancies with community bathrooms, exit stairways must be enclosed in construction of 1-hour fire-resistance-rated construction and all openings to exit stairway enclosures must be protected with self-closing 90-minute rated opening protectives.
(Amend Coun. J. 2-19-20, p. 14473, Art. V, § 22)
Where openings are required to be protected, opening protectives must be maintained self-closing or automatic- closing by smoke detection. Existing fusible-link-type automatic door-closing devices must be replaced if the fusible link rating exceeds 135ºF (57ºC).
Where fire shields are provided to protect openings of balconies or vestibules in existing smokeproof towers, the fire shields must comply with Sections 14X-5-502.9.1 through 14X-5-502.9.4.
Fire shields must comply with all applicable requirements for opening protectives in Chapter 14B-7.
Fire shields must have an opening sash having a clear area not less than one-half the area of the exit doors leading from the buildings to the vestibule or balcony and must be located not less than four feet (1219 mm) above the floor and not more than six inches (152 mm) below the ceiling of the vestibule or balcony, arranged to open automatically in case of fire to the full limit and to be held securely in such open position. Provision must be made for the manual opening or closing of the sash.
The automatic opening of the sash must be actuated by devices located inside the building within five feet (1524 mm) of the door from the building to the vestibule or balcony and located also on the ceiling of the vestibule or balcony. Such devices must operate as a result of rate of temperature rise or when the surrounding air reaches a temperature of 120ºF (49 ºC).
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