803.12 Stability.

Interior finish materials regulated by this chapter shall be applied or otherwise fastened in such a manner that such materials will not readily become detached where subjected to room temperatures of 200°F (93.3°C) for not less than 30 minutes.

803.13 Application of interior finish materials to fire-resistance-rated or noncombustible building elements.

Where interior finish materials are applied on walls, ceilings or structural elements required to have a fire-resistance rating or to be of noncombustible construction, these finish materials shall comply with the provisions of this section.

803.13.1 Direct attachment and furred construction.

Where walls and ceilings are required by any provision in this code to be of fire-resistance-rated or noncombustible construction, the interior finish material shall be applied directly against such construction or to furring strips not exceeding 1 3/4 inches (44.5 mm), applied directly against such surfaces.

803.13.1.1 Furred construction.

If the interior finish material is applied to furring strips, the intervening spaces between such furring strips shall comply with one of the following:

   1.   Be filled with material that is inorganic or noncombustible;

   2.   Be filled with material that meets the requirements of a Class A material in accordance with Section 803.1.1 or 803.1.2; or

   3.   Be fireblocked at a maximum of 8 feet (2438.4 mm) in every direction in accordance with Section 718.