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Home My WebLink AboutORDINANCES - 12011987 - 87-99 r II 4 I I li ORDINANCE NO. 87-99 (Smoke Management System) The Contra Costa County Board of Supervisors ordains as follows (omitting the parenthetical footnotes from the official text of the enacted or amended provisions of the County Ordinance Code)':, SECTION I . SUMMARY. This ordinance amends the 1985 Edition of the Uniform Building Code, which is the County' s building code, to require smoke management systems in buildings five stories or more in height , and in buildings with occupied floors located more than 40 fleet above the lowest level of Fire Department vehicle access. SECTIION II . Article 74-3.17 is added to the County Ordinance Coder; to amend UBC Chapter 17 , to require smoke management systems, to read: ARTICLE 74-3 .17 UBC Chapter 17 l74-3 .1701 UBC Sec. 1725, Smoke Management System. Section 1725 is added, to read: "Sec. 1725. Smoke Management System (a) Purpose. The requirements of this section are intended to establish basic requirements for controlling the movement of smoke within a building (smoke management system) . II (b) Where Required. This section shall apply to all buildings housing A, B, E, I and R-1 occupancies which meet any of the following conditions : 1. Five ( 5 ) or more stories in height. 2 . Having occupied floors located more than 40 feet above the lowest level of Fire Department vehicle access EXCEPTIONS: 1. Open parking garages . 2 . Aviation control towers. (c) HVAC Systems . Smoke management systems may be combined wittv' other air handling systems provided that, upon activation, the smoke management functions override all other functions . Any air handling system shall automatically shut down or change operation to assist in smoke control upon such activation. 4 (d) Design and Installation. 1. Every smoke management system shall be designed with zones which shall not exceed one floor per zone. Upon activation, the system shall operate at 100 percent exhaust to the exterior from any zone of smoke generation and at 100 percent outside supply air to the zone of smoke generation and adjacent zones. Adjacent zones shall have returned dampers closed. The zone of smoke generation shall be provided withjlnot less than six air changes per hour. 2. Operation of the smoke management system shall be initiated automatically upon the actuation of appropriately zoned automatic sprinkler flow indicators and/or smoke detectors. Smoke detectors complying with the requirements of UBC Standard 43- 6 shall be provided in accordance with Section 1009 of the Uniform Mechanical Code . (10--2-87) (ORDINANCE NO. 87-99) II J 3. ' Zone operation status indicators and manual controls capable of overriding the automatic controls shall be provided in a location approved by the fire department. 4 . Exhaust discharges and fresh air supply intakes shall be so located as to prevent the re-introduction of smoke into ,,the building. 5. The location of required fire dampers or combination smoke/fire dampers shall be clearly indicated on plans . 6. Duct materials shall be capable of safely conveying heat; smoke and toxic gases, to withstand both positive and negative pressures which may be imposed during the smoke-control mode, and meet all the requirements of the Uniform Mechanical Code (e ) Subject to approval by the Fire Chief and the Building Official , alternate methods of smoke control may be used when special building design problems prevent total compliance with subsection (d) , above. " (Ord. 87- 99 § 2 . ) 74-3 .1703 UBC Sec. 1726 , Standby Power, Light and Emergency Systems . Section 1726 is added, to read. "Sec. 1726. Standby Power, Light and Emergency Systems . (a ) An on-site standby power generation system conforming to U.B.C. Standard No. 18-1 shall be provided in all buildings requiring a smoke management system as set forth in Section 1725. The system shall be equipped with suitable means for automatically starting the generator set upon failure of the normal electrical supply systems and for automatic transfer of all functions required by this section at full power within 60 seconds of such service failure. System supervision with manual start and transfer features shall be provided at a location approved by the fire department. 11 ' An on-premises fuel supply sufficient for not less than four (4 ) hours full demand operation of the system shall be provided. (b) The standby power generation system shall supply and be sized for all of the following: 1. Smoke management system. 2 . Elevator car lighting. 3. Required exitway lighting. 4 . Sprinkler alarm system. 5. Fire detection system. 6. Fire alarm system. Subject to approval by the Fire Chief, Items 2 through 6 may be supplied by other on-site power sources such as battery units. (c) The above requirements may be modified when, in the opinion of the Fire Chief and with the concurrence of the Building Official, adequate building access as required by the Uniform Fire Codelis provided. " (Ord. 87-99 § 2 . ) SECTION III . Article 74-3 .18 is added to the County Ordinance Code, to amend UBC § 1807 , to read: (10-2-87 ) (ORDINANCE NO. 87-99 ) ARTICLE 74-3.18 UBC Chapter 18 I' i74-3 .1801 UBC Sec. 1807(x) , Smoke Control . Subsection (g) of Section 1807 is amended to read: r " (g ) Smoke Control . Smoke control shall be provided in accordance with Section 1725 of this Code. " (Ord'. 87- 99 § 3 . ) SECTIION IV. EFFECTIVE DATE. This ordinance becomes effective 30 daysll, after passage, and within 15 days of passage shall be published once with the names of the supervisors voting for and against it in the Contra Costa Times , a newspaper published in thisii County. PASSED and ADOPTED on December 1 , 1987 by the following vote: AYES: Supervi-ors Powers ,Fanden , Schroder , Torlakson, MCPe2k. �i NOES: "?one . ABSENT: None . I! ABSTAIN: None . II ATTEST: PHIL BATCHELOR, Clerk of the Board of Supervisors and County Administrator By Deputy Board Chair (LTF:df) ( 10-,112-87 ) (smke/managemt/sys) (ORDINANCE NO. 87-99 )