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FIRE AND SMOKE PROTECTION FEATURES TABLE 715.5 TABLE 715.5.4 FIRE WINDOW ASSEMBLY FIRE PROTECTION RATINGS LIMITING SIZES OF WIRED GLASS PANELS MINIMUM FIRE OPENING FIRE MAXIMUM ' MAXIMUM MAXIMUM REQUIRED WINDOW PROTECTION AREA HEIGHT WIDTH ASSEMBLY ASSEMBLY RATING (square inches) (inches) (Inches) TYPE OF ASSEMBLY RATING(hours) RATING(hours) 3 hours 0 0 0 Fire walls All NPa I4i hour doors in exterior walls 0 0 0 >1 N„-.�j..a. ,. - 4�s +"i�s '='1;��';' l and hoursl4y _ 100 33 10 •Interior walls: Smoke barriers 1 314 %hour 1,296 1— 54 54 1 5 /4 20 minutes Not Limited Not Limited Not Limited Fire partitions /rz '/3 Fire window 1,296 54 54 --"—"'— assemblies Exterior walls > I ll/' 1 3/4 For SI: )inch=25.4 mm,I square inch=6452nml1. Party wall All NP 715.5.7 Window mullions. Metal mullions that exceed a NP=Not Permitted. nominal height of 12 feet(3658 mm)shall be protected with a.Not permitted except as specified in Section 715.2. materials to afford the same fire-resistance rating as 715.5.1 Testing under positive pressure.NFPA 257 or UL required for the wall construction in which the protective is 9 shall evaluate fire-protection-rated glazing under positive located. pressure.Within the first 10 minutes of a test,the pressure in 715.5.8 Interior fire window assemblies. Fire-protec- the furnace shall be adjusted so at least two-thirds of the test tion-rated glazing used in fire window assemblies located in specimen is above the neutral pressure plane,and the neutral fire partitions and fire barriers shall be limited to use in pressure plane shall be maintained at that height for the bal- assemblies with a maximum fire-resistance rating of 1 hour ance of the test. in accordance with this section. (. 715.5.2 Nonsymmetrical glazing systems.Nonsymmetri- 715.5.8.1 Where 3/a hour fire protection window �/' cal fire-protection-rated glazing systems in fire partitions, assemblies permitted. Fire-protection-rated glazing fire barriers or in exterior walls with a fire separation dis- requiring 45-minute opening protection in accordance lance of 5 feet(1524 mm)or less pursuant to Section 705 with Table 715.5 shall he limited to fire partitions shall be tested with both faces exposed to the furnace, and designed in accordance with Section 709 and fire barri- the assignedfire protection rating shall be the shortest dura- ers utilized in the applications set forth in Sections lion obtained from the two tests conducted in compliance 707.3.6 and 707.3.8 where the fire-resistancerating does with NFPA 257 or UL 9. not exceed 1 hour. 715.5.3 Safety glazing. Fire-protection-rated glazing 715.5.8.2 Area limitations.The total area of windows installed in fire window assemblies in areas subject to shall not exceed 25 percent of the area of a common wall human impact in hazardous locations shall comply with with any room. Chapter 24. 715.5.9 Labeling requirements. Fire-protection-rated 715.5.4 Wired glass. Steel window frame assemblies of glazing shall bearalobel or other identification showing the 0.125-inch (3.2 mm) minimum solid section or of not less name of the manufacturer,the test standard and information than nominal 0.048-inch-thick(1.2 mm)formed sheet steel required in Section 715.5.9.1 that shall be issued by an members fabricated by pressing, mitering, riveting, inter- approved agency and shall be permanently affixed to the locking or welding and having provision for glazing with glazing. 4/inch(6t4 mm)wired glass where securely installed in the 715.5.9.1 Identification.For fire-protection-rated glaz- building construction and glazed with '/4 inch (6.4 mm) ing,the label shall bear the following two-part identifica- labeled wired glass shall be deemed to meet the require- don: "OH — XXX" "OH" indicates that the glazing ments for a t/4-hourfire window assembly.Wired glass pan- meets both the fire protection and the hose-stream els shall conform to the size limitations set forth in Table requirements of NFPA 257 or UL 9 and is permitted to be 715.5.4. used in openings. "XXX"represents the fire-protection rating period,in minutes,that was tested. 715.5.5 Nonwired glass.Glazing other than wired glass in fire window assemblies shall be fire-protection-rated glaz- ing installed in accordance with and complying with the size SECTION 716 limitations set forth in NFPA 80 DUCTS AND AIR TRANSFER OPENINGS '•'§ 716.1 General.The provisions of this section shall govern the =1Vt T.. :;tint iitYom9Cie:blocing rai. Nth se protection of duct penetrations and air transfer openings in r':3 '�rgttd}an approved frames,.t 4 assemblies required to be protected. 2010 OREGON STRUCTURAL SPECIALTY CODE 123