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FIRE AND SMOKE PROTECTION FEATURES ferential of 0.01 inch of water(2.49 Pa).The system 6. Noncombustible items that are cast into con- shall have an F rating/T rating of not less than 1 hour crete building elements and that do not pene- but not less than the required rating of the floor pen- trate both top and bottom surfaces of the etrated. element. Exceptions: 7. The ceiling membrane of 1- and 2-hour fire- 1. Floor penetrations contained and located resistance-rated horizontal assemblies is per- within the cavity of a wall above the floor mitted to be interrupted with the double wood or below the floor do not require a T rating. top plate of a fire-resistance-rated wall assem- bly,2. Floor penetrations by floor drains, tub provided that all penetrating items through the double top plates are protected in drains or shower drains contained and accordance with Section 714.4.1.1.1 or located within the concealed space of a hor- 714.4.1.1.2. The fire-resistance rating of the izontal assembly do not require a T rating. wall shall not be less than the rating of the hor- 714.4.1.2 Membrane penetrations. Penetrations of izontal assembly. membranes that are part of a horizontal assembly shall 714.4.1.3 Dissimilar materials.Noncombustible pene- comply with Section 714.4.1.1.1 or 714.4.1.1.2.Where rating items shall not connect to combustible materials floor/ceiling assemblies are required to have a fire- beyond the point of firestopping unless it can be dem- resistance rating, recessed fixtures shall be installed onstrated that the fire-resistance integrity of the hori- such that the required fire resistance will not be zontal assembly is maintained. reduced. 714.4.2 Nonfire-resistance-rated assemblies. Penetra- Exceptions: tions of nonfire-resistance-rated floor or floor/ceiling 1. Membrane penetrations by steel, ferrous or assemblies or the ceiling membrane of a nonfire-resis- copper conduits,pipes,tubes or,vents,or con- tance-rated roof/ceiling assembly shall meet the require- crete or masonry items where the annular ments of Section 713 or shall comply with Section space is protected either in accordance with 714.4.2.1 or 714.4.2.2. Section 714.4.1.1 or to prevent the free pas- 714.4.2.1 Noncombustible penetrating items. Non- sage of flame and the products of combustion. combustible penetrating items that connect not more The aggregate area of the openings through the membrane shall not exceed 100 squaremar' five stories are permitted,provided that the annu- I l j inches (64 500 tutu') in any 100 square feet lar space is filled to resist the free passage of flame and the products of combustion with an approved noncom- (9.3 m2) of ceiling area in assemblies tested bustible material or with a fill, void or cavity material without penetrations. that is tested and classified for use in through-penetra- 2. Ceiling membrane penetrations of maximum flan firestop systems. 2-hour horizontal assemblies by steel electri- cal boxes that do not exceed 16 square inches connect Penetrating items. Penetrating items that pro- (10 323 mm2) in area, provided the aggregate vided t not more than two stories are permitted,area of such penetrations does not exceed 100 that the annular space is filled with an approved square inches(44 500 mm2)in any 100 square material to resist the free passage of flame and the feet(9.29 m2)of ceiling area,and the annular products of combustion. space between the ceiling membrane and the 714.5 Penetrations in smoke barriers. Penetrations in box does not exceed'/a inch(3.2 mm). smoke barriers shall be protected by an approved through- 3. Membrane penetrations by electrical boxes of penetration firestop system installed and tested in accordance any size or type,which have been listed as pats with the requirements of UL 1479 for air leakage. The L rat- of an opening protective material system for ing of the system measured at 0.30 inch(7.47 Pa)of water in use in horizontal assemblies and are installed both the ambient temperature and elevated temperature tests, in accordance with the instructions included in shall not exceed: the listing. 1. 5.0 cfm per square foot(0.025m3/s•m2)of penetration 4. Membrane penetrations by listed electrical opening for each through-penetration firestop system; boxes of any material, provided such boxes or have been tested for use in fire-resistance- 2. A total cumulative leakage of 50 cfm (0.024m3/s) for rated assemblies and are installed in accor- any 100 square feet(9.3 m')of wall area,or floor area. dance with the instructions included in the list- ing. The annular space between the ceiling membrane and the box shall not exceed 1/3 SECTION 715 inch(3.2 ruin)unless listed otherwise. FIRE-RESISTANT JOINT SYSTEMS 5. The annular space created by the penetration 715.1 General.Joints installed in or between fire-resistance- I. of a fire sprinkler,provided it is covered by a rated walls, floor or floor/ceiling assemblies and roofs or metal escutcheon plate. roof/ceiling assemblies shall be protected by an approved 140 2014 OREGON STRUCTURAL SPECIALTY CODE