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9.33.8.2.(6)
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Application
Application 1: 
Flame-spread rating and smoke developed classification limitations of piping, in heating and air-conditioning systems serving only one dwelling unit, in buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9], that is located within a concealed space in a wall, in a floor slab, or enclosed in a noncombustible raceway or conduit.
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Intent
Intent 1: 
To exempt from the application of Sentence 9.33.8.2.(4) situations where insulation is unlikely to be exposed to fire and where conditions for sustaining a fire are poor.
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