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i � � �: � � T113LE 705.1.2-705.1.2.3.1 � , I 7. See 704.1. 8. See Table 600,705.1.1 and 503.4.8. � I TABLE 705.1.2 = '�-; �qINIMUM FIRE RESISTANCE OF WALLS, PARTITIONS 9. See 704.2.2.3 for walls and partitions in Group R4 occupancies, _ I AND OPENING PROTECTIVES�(hrs) 10.In Group R4 Large Facility occupancies,sleeping room doors shall _ resist the passage of smoke but closers are not required. c � WALLS AND OPENING CO��PONENT PARTITIONS9 PROTECTIVES 705.1.2.2 Fire dampers i I ' 705.1.2.2.1 Fire dampers, installed in accordance SHAFT ENCLOSURES(including with manufacturers ins[allation instructions,sh811 be stainvays,exits&elev�ators) provided in ducts penetrating walls or partitions _ � � having a fire resistance rating of one hour or more. - 4 or more stories 2 1 1/2 = less lhan 4 stories 12 IZ Exceptions: _ all n�fuse chutes � 2 1 1/z '' 1. Where branch ducts connect to return risers in � � which the air flow is u ward and subducts at WALLS AND PARTITIONS P c fire�valls3 ; 4 3 least 22 inches (559 mm) long are carried up = within tenant space See 704.2.3 inside the riser at each inlet. _ � 2. In duct systems of any duct materials or combi- � : tenant space(see also 04.3) 1 3/4 nations thereof allowed by Chapter 6 of the ' _ horizontal exit 2 1 1/2 = I io Standard Mechanical Code penetrating 1-hour = exi[access corridors See Note 4,5 20 min. _ .___i____. _ walls or partitions,where the duct penetrating the smoke barriers See 409.1.2 rated wall or partition meets all of the following : refuse and laundry chute access _ 1 3/4_._, minlmUm I'eC]uliements: _ rooms - 1. the duct shall not exceed 100 sq inch(O.Oo = incinerator rooms 2 1 1/2 _ _ refuse and laundry chute termination 1 3/4 m2�' = ri oms 2. che duct shall be of 0.0217 inch(0.55 mm) = , minimum steel, a = hazardous occupancy control areas � 3/4 . 3. the duct shall continue with no duct open- � higl�rise buildings See 412 -- covered mall buildings See 413 ings for not less than 5 ft (1.5 m)from the i rated wall, asscmbly buildings See Note 2 4. the duct shal] be installed above a ceiling, _ batlirooms&restrooms See Note 6 and, _ I5. the duct does not terminate at a wall regis- - � OCCUPANCY SEPARATIONS� ° ter in the rated wall. = _ i ' Required Fire _ = Resistance ' = i 4 3 705.1.2.2.2 Fire dampers shall comply with the = = I g 3 requirements of UL 555 and shall bear the label of = = I 2 > >�2 an approved testing agency. Closure shall interrupt '_ _ I 1 3/4 any migratory air flow and restrict the passage of = = ilame. Fire dampers shall be classi�ed and identi- = = EJ{TERIOR WALLSB All 3/4 , fied for use in either. = _ � � 1. Static systems that automatically shut down in Note�: • I the event of fire. ' l Table 600 may require greater fire resistance of walls to insure struo- 2, Dy17am1C SyStems th8t Opet'8te IIl [he eVent Of � tura(stability. � ' flre. � 2i All exits and s�airways in Group A and H occupancies shall be 2- ' hours wi(h l 1/2-hour door assemblies. ']05.1.2.3 Smoke barriers 3�. See also 503.1.2. = 4.'See 704.2.3 anci 704.2.4. 705.1.2.3.1 An approved damper designed to resist = s� s�e ao9 foT sPr��tclerea cro�P i-b��ia��s. the passage of smoke shall be installed in accor- _ 6. Fire rated bathioom/restroom doors are not required when opening dance with the manufacturer's installation instruc- _ � onto fire rated halls,corridors,exic access providea: tions at each air transfer opening or duct penetration - I a. no other rooms open off of the bathroom/restroom,and of a required smoke barrier. The required smoke = b. no gas or electric appliances are located in the bathroom/restroom, damper shall be ananged to operate automatically, _ a�d controlled by a smoke detection system and manual ` _ c, the walls, partitions, floor and ceiling of the bathroom/restroom = i have a fire�ating at least equal to the rating of the hall,corridor or positioning shall be permitted from a remote com- __ � exit access�and mand station. , 1 � I d. the bathroom/restroom is not used for any other purpose than it is ' � designed. I � � I , 94 � I STANDARD BUILDING CODE�1997 I