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// CODE SNIPPET

805.1.1 Subfloor Construction

Building Code 2018 of Illinois > 8 Interior Finishes > 805 Combustible Materials in Types I and II Construction > 805.1 Application > 805.1.1 Subfloor Construction

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Floor sleepers, bucks and nailing blocks shall not be constructed of combustible materials, unless the space between the fire-resistance-rated floor assembly and the flooring is either solidly filled with noncombustible materials or fireblocked in accordance with Section 718, and provided that such open spaces shall not extend under or through permanent partitions or walls.

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