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FIRE AND SMOKE PROTECTION FEATURES 712.3 Fire-resistance rating. The fire-resistance rating of 712.5 Penetrations. Penetrations of horizontal assemblies floor and roof assemblies shall not be less than that required by shall comply with Section 713. the building type of construction Where the floor assembly 712.6 Joints.Joints made in or between horizontal assemblies separates mixed occupancies, the assembly shall have a shall comply with Section 714.The void created at the intersec- fire-resistance rating of not less than that required by Section lion of a floor/ceiling assembly and an exterior curtain wall 508.4 based on the occupancies being separated. Where the assembly shall be protected in accordance with Section 714.4. floor assembly separates a single occupancy into different fire areas, the assembly shall have a fire-resistance rating of not 712.7 Ducts and air transfer openings.Penetrations in hori- less than that required by Section 707.3.9.Horizontal assem- zontal assemblies by ducts and air transfer openings shall corn- blies separating dwelling units in the same building and hori- ply with Section 716. zontal assemblies separating sleeping units in the same 712.5 Floor fire door assemblies.Floor fire door assemblies building shall be a minimum of 1-hour fire-resistance-rated used to protect openings in fne-resistance-rated floors shall be construction. tested in accordance with NFPA 288, and shall achieve a Exception:Dwelling unit and sleeping unit separations in fire-resistance rating not less than the assembly being pene- buildings of Type UB,UM and VB construction shall have trated. Floor fire door assemblies shall be labeled by an fire-resistance ratings of not less than 4,hour in buildings approved agency. The label shall be permanently affixed and equipped throughout with an automatic sprinkler system in shall specify the manufacturer, the test standard and the accordance with Section 903.3.1.1. fire-resistance rating. 712.3.1 Ceiling panels.Where the weight of lay-in ceiling 712.9 Smoke barrier. Where horizontal assemblies are panels,used as part of fire-resistance-rated floor/ceiling or required to resist the movement of smoke by other sections of roof/ceiling assemblies,is not adequate to resist an upward this code in accordance with the definition of smoke barrier, force of 1 pound per square foot (48 Pa), wire or other penetrations and joints in such horizontal assemblies shall be approved devices shall be installed above the panels to pre- protected as required for smoke barriers in accordance with vent vertical displacement under such upward force. Sections`7J35'a49914.6.kkegardless of the number of stories 7123.2 Access doors. Access doors shall be permitted in connected by elevator shaft enclosures,doors located in eleva- ceilings of fire-resistance-rated Boodceiling and rooflceil- tor shaft enclosures that penetrate the horizontal assembly shall ing assemblies provided such doors are tested in accordance be protected by enclosed elevator lobbies complying with Sec- with ASTM E 119 or UL 263 as horizontal assemblies and tion'70&141t1.0penings through horizontal assemblies shall labeled by an approved agency for such purpose. be protected by shaft enclosures complying with Section 708. Horizontal assemblies shall not be allowed to have unprotected �/ 712.3.3 Unusable space. In 1-hour fire-resistance-rated vertical openings. floor assemblies,the ceiling membrane is not required to be installed over unusable crawl spaces. In 1-hour fire-resis- tance-rated roof assemblies, the floor membrane is not SECTION 713 required to be installed where unusable attic space occurs PENETRATIONS above. 713.1 Scope.The provisions of this section shall govern the 712.4 Continuity. Assemblies shall be continuous without materials and methods of construction used to protect through openings,penetrations or joints except as permitted by this sec- penetrations and membrane penetrations of horizontal assem- lion and Sections 708.2,713 4,714 and 1022.1.Skylights and Mies and fire-resistance-rated wall assemblies. other penetrations through a fire-resistance-rated roof deck or slab are permitted to be unprotected, provided that the strut- 713.1.1 Ducts and air transfer openings.Penetrations of tural integrity of the tire-resistance-rated roof assembly is fire-resistance-rated walls by ducts that are not protected maintained. Unprotected skylights shall not be permitted in with dampers shall comply with Sections 713.2 through roof assemblies required to be fire-resistance rated in actor- 713.33. Penetrations of horizontal assemblies not pro- dance with Section 704.10. The supporting construction shall tooted with a shaft as permitted by Exception 4 of Section be protected to afford the required fire-resistance rating of the 708.2,and not required to be protected with fire dampers by horizontal assembly supported. other sections of this code,shall comply with Sections 713.4 through 713.4.2.2.Ducts and air transfer openings that are Exception:In buildings of Type IID,RIB or VB construe- protected with dampers shall comply with Section 716. tion,the construction supporting the horizontal assembly is not required to be fire-resistance-rated at the following: 713.2 Installation details.Where sleeves are used, they shall be securely fastened to the assembly penetrated. The space 1. Horizontal assemblies at the separations of incidental between the item contained in the sleeve and the sleeve itself uses as specified by Table 508.2.5, provided the and any space between the sleeve and the assembly penetrated required fire-resistance rating does not exceed I shall be protected in accordance with this section. Insulation hour. and coverings on or in the penetrating item shall not penetrate 2. Horizontal assemblies at the separations of dwelling the assembly unless the specific material used has been tested C units and sleeping units as required by Section 420.3. as part of the assembly in accordance with this section. 3. Horizontal assemblies at smoke barriers constructed 713.3 Fire-resistance-rated walls. Penetrations into or in accordance with Section 710. through fire walls,fire barriers, smoke barrier walls and fire 116 2010 OREGON STRUCTURAL SPECIALTY CODE