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Section 805 Combustible Materials in Types I and II Construction

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805.1 Application
Combustible materials installed on or embedded in floors of buildings of Type I or II construction shall comply with Sections 805.1.1 through 805.1.3.
Exception: Stages and platforms constructed in accordance with Sections 410.2 and 410.3, respectively.
805.1.1 Subfloor Construction
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.
805.1.2 Wood Finish Flooring
Wood finish flooring is permitted to be attached directly to the embedded or fireblocked wood sleepers and shall be permitted where cemented directly to the top surface of fire-resistance-rated floor assemblies or directly to a wood subfloor attached to sleepers as provided for in Section 805.1.1.
805.1.3 Insulating Boards
Combustible insulating boards not more than 1/2 inch (12.7 mm) thick and covered with finish flooring are permitted where attached directly to a noncombustible floor assembly or to wood subflooring attached to sleepers as provided for in Section 805.1.1.

Related Code Sections

Section 603 Types of Construction, Combustible Material in Types I and II Construction
Combustible materials shall be permitted in buildings of Type I or II construction in the following applications and in accordance with Sections ...
Section 603 Types of Construction, Combustible Material in Types I and II Construction
Combustible materials shall be permitted in buildings of Type I or II construction in the following applications and in accordance with Sections ...
Section 805 Interior Finishes, Combustible Materials in Types I and II Construction
Combustible materials installed on or embedded in floors of buildings of Type I or II construction shall comply with Sections 805.1.1 through 805.1.3 ...
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603.1.2 Types of Construction, Piping
The use of combustible piping materials shall be permitted where installed in accordance with the limitations of the International Mechanical Code ...