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FIRE AND SMOKE PROTECTION FEATURES . UL 555C or shall be tested as part of a fire-resistance-rated installed on either side of the smoke barrier door floor/ceiling or roof/ceiling assembly in accordance with opening. I. ` ASTM E119 or UL 263. 3. Where a smoke damper is installed within an air J 717.3.2 Damper rating.Damper ratings shall be in actor- transfer opening in a wall, a spot-type detector dance with Sections 717.3.2.1 through 717.3.2.3. listed for releasing service shall be installed 717.3.2.1 Fire damper ratings. Fire dampers shall within 5 feet (1524 tam) horizontally of the have the minimum fire protection rating specified in damper. Table 717.3.2.1 for the type of penetration. 4. Where a smoke damper is installed in a corridor TABLE 717.3.2.1 wall or ceiling, the damper shall be permitted to FIRE DAMPER RATING be controlled by a smoke detection system MINIMUM installed in the corridor. TYPE OF DAMPER PENETRATION RATING (hours)PER Where a total-coverage smoke detector system is provided within areas served by a heating, venti- Less than 3-hour fire-resistance-rated assemblies 1.5 lation and air-conditioning (HVAC) system, 3-hour or greater fire-resistance-rated assemblies 3 smoke dampers shall be permitted to be con- 717.3.2.2 Smoke damper ratings. Smoke damper trolled by the smoke detection system. leakage ratings shall be Class I or II. Elevated tempera- 717.3.3.3 Combination fire/smoke damper actua- ture ratings shall not be less than 250°F(121°C). tion.Combination fire/smoke damper actuation shall be in 717.3.2.3 Combination fire/smoke damper ratings. accordance with Sections 717.3.3.1 and 717.3.3.2. Combination fire/smoke dampers shall have the mini- Combination fire/smoke dampers installed in smoke mum fire protection rating specified for fire dampers in control system shaft penetrations shall not be activated by local area smoke detection unless it is secondary to Table 717.3.2.1 for the type of penetration and shall also have a minimum smoke damper rating as specified the smoke management system controls. in Section 717.3.2.2. 717.3.3.4 Ceiling radiation damper actuation. The 717.3.3 Damper actuation. Damper actuation shall be in operating temperature of a ceiling radiation damper accordacordance with Sections 717.3.3.1 through 717.3.3.4 as actuation device shall be 50°F(27.8°C) above the nor- mat temperature within the duct system, but not less than 160°F(71°C). 717.3.3.1 Fire damper actuation device. The fire 717.4 Access and identification. Fire and smoke dampers damper actuation device shall meet one of the follow- shall be provided with an approved means of access,which is ing requirements: large enough to permit inspection and maintenance of the I. The operating temperature shall be approxi- damper and its operating parts.The access shall not affect the mately 50°F (10°C) above the normal tempera- integrity of fire-resistance-rated assemblies.The access open- ture within the duct system, but not less than ings shall not reduce the fire-resistance rating of the assem- 160°F(71°C). bly. Access points shall be permanently identified on the 2. The operating temperature shall be not more than exterior by a label having letters not less than '/a inch (12.7 350°F(177°C) where located in a smoke control nun) in height reading: FIRE/SMOKE DAMPER, SMOKE system complying with Section 909. DAMPER or FIRE DAMPER.Access doors in ducts shall be tight fitting and suitable for the required duct construction. 717.3.3.2 Smoke damper actuation. The smoke damper shall close upon actuation of a listed smoke 717.5 Where required. Fire dampers, smoke dampers and detector or detectors installed in accordance with Sec- combination fire/smoke dampers shall be provided at the locations prescribed in Sections 717.5.1 through 717.5.7 and lion 907.3 and one of the following methods, as appG- cable: 717.6.Where an assembly is required to have both fire damp- ers and smoke dampers,combination fire/smoke dampers or a 1. Where a smoke damper is installed within a duct, fire damper and a smoke damper shall be required. a smoke detector shall be installed in the duct within 5 feet (1524 tam) of the damper with no 717.5.1 Fire walls. Ducts and air transfer openings per- air outlets or inlets between the detector and the per- mitted in fire walls in accordance with Section 706.11 damper. The detector shall be listed for the air shall be protected with listed fire dampers installed in velocity,temperature and humidity anticipated at accordance with their listing. the point where it is installed. Other than in 717.5.1.1 Horizontal exits. A listed smoke damper mechanical smoke control systems, dampers designed to resist the passage of smoke shall be pro- shall be closed upon fan shutdown where local vided at each point a duct or air transfer opening pene- smoke detectors require a minimum velocity to mates a fire wall that serves as a horizontal exit. operate. 717.5.2 Fire barriers. Ducts and air transfer openings of 2. Where a smoke damper is installed above smoke fire barriers shall be protected with approved fire dampers l barrier doors in a smoke barrier, a spot-type installed in accordance with their listing. Ducts and air detector listed for releasing service shall be transfer openings shall not penetrate enclosures for stair- 148 2014 OREGON STRUCTURAL SPECIALTY CODE