in area facing an open area that is at least 20 ft. Multiple Design Options Now Available: Natural ventilation alternative ( ) Mechanical ventilation alternative ( ) Stair pressurization alternative ( )ġ6 Natural Ventilation Open exterior balcony or vestibule with opening 16 sq.
#NFPA 92A PDF DOWNLOAD CODE#
Significant Changes to previous Code approaches used. This is to ensure the damper will not close prematurely when the system is operating in the smoke control mode. Smoke/fire dampers at HVAC openings, Class II minimum leakage rating, 250 oF (121 oC) thermal release.Ĭombination Fire/Smoke Dampers: When a fire damper is used within ductwork on a smoke control system, the operating temperature is required to be at least 50F (10C) above the maximum smoke control temperature or a maximum of 350F (177C). Leakage area ratios walls exits other shafts floors and roofs openings determined by areaĪutomatic closing (Self-closing OK in many normally closed applications). If entirely bounded within a zone, no pressure difference can be obtained between the active and passive zone.ġ2 Smoke Barriers Used to separate smoke zones: 1-hour rated wall construction, outside wall to outside wall. May be separate zone or part of the same zone (sub-zone). When active is not feasible (small rooms, no make-up air, unoccupied areas) Depends upon location within zone. Defined as mechanical systems by Code and include pressurization method, airflow method and exhaust method.ġ1 Passive Smoke Control Previously known as “compartmentation”. “Active” uses mechanical equipment to control the spread of smoke in a structure. “Passive” uses building construction to limit the spread of smoke in a structure. “Active” Smoke Control Smoke Barriers, Zone Boundaries and Opening Protection Stairwell Pressurization – “Smokeproof” Enclosures” Types of Mechanical Smoke Control Systems They do not always maintain a tenable environment in the smoke control zone of fire origin. Maintain a tenable environment by limiting the spread of smoke to areas outside the zone of origin (IBC 909.1). They are intended to: Manage where smoke goes and where smoke does not go.
It is important to recognize that these systems are not intended for: Preservation of contents. Alternate Materials and Method Requests.Ĩ Smoke Control System Concepts Introduction Smoke Control Required For: Atrium (Section 404.4) Enclosed Malls when Atrium qualifications are met (Section 402.9) Some Underground Buildings (Section 405.5) Smokeproof Enclosure design options (Sections and ) Stages, in lieu of roof vents (Section )ħ Other Requirements May be required by local (or state) ordinances for all high-rise buildings - carry-over from previous codes. There are no specific types of systems required by Code. The IBC requires systems to be installed or provided for certain special uses or occupancy types. ICC Guide to Smoke Control –Evans & Klote NFPA 92A & 92B National Resource Council of Canada International Building Code, Section 909 Formerly 1994 & 1997 UBC Section 905 California Building Code NFPA 92A - Standard for Smoke Control Systems Using Barriers and Pressure Differences NFPA 92B - Standard for Smoke Management in Malls, Atria, and Large AreasĤ Design References Design of Smoke Management Systems –Klote & Milke System Concepts Smoke Control System Information – Using Documents Commissioning January 20, 2009Ģ Agenda Codes related to Smoke Control and Design Guides NEBB 2010 Semi-Annual Recertification Presented By: Matt Donahue, P.E. 1 Smoke Control Systems Introduction and Commissioning
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