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t , <br /> 7. AMENDMENTS. <br /> (c) Reference to ICC International Plumbing Code in <br /> Chapter 16 changed to reference Illinois State Plumbing Code, �}3 1998 as <br /> amended. <br /> � , <br /> , � • <br /> , • <br /> �dl M-304.9 Guards. Guards shall be provided where <br /> ��liances equinment fans or other components that require service are <br /> located within 10 feet of a roof ed�e`or open side of a walking surface and such <br /> ed�e or open side is located more than 6 feet above the floor, roof or �rade <br /> below The guard shall extend not less than 30 inches beyond each end of such <br /> ��liance equinment fan or component and the top of the Quard shall be <br /> located not less than 42 inches above the elevated surface adjacent to the �uard. <br /> The Quard shall be constructed so as to prevent the passage of a 21 inch <br /> diameter sphere and shall complv with the loadin�equirements for euards <br /> �ecified in the International Buildin C�de. <br /> Exception• HVAC equinment located on a roof with the <br /> service side of the unit located 10 feet or more from the roof edge �uards are <br /> not required,�provided the distance from anv side of unit is not less than 6 feet <br /> from the roof ed�e. <br /> Exception• Appliances equipment fans and other <br /> components located on a flat roof enclosed bv parapet walls not less than 36 <br /> inches hi , no guards required. <br /> �l M-603.4 Nonmetallic ducts. Nonmetallic ducts shall <br /> be constructed with Class 0 or Class 1 duct material in accordance with UL <br /> 181. Fibrous duct construction shall conform to the SMACNA Fibrous Glass <br /> Duct Construction Standards or NAIMA Fibrous Glass Duct Construction <br /> Standards The maximum air temperature within nonmetallic ducts shall not <br /> exceed 250 degrees F 121 de e�r es CZ Nonmetallic ducts, specificallv duct <br /> board, shall onlv be used in unconditioned spaces. <br />