15-8-360 Use.

   Every roof placed on a building or structure shall be covered with Class A or Class B roof coverings except that Class C roof coverings shall be accepted on:

   (1)   Buildings of one-family or two-family residential use;

   (2)   Buildings of wood frame construction;

   (3)   Buildings located outside of the fire limits which on the basis of height and area could be of wood frame construction under this Code.

(Prior code § 62-8.3; Amend Coun. J. 11-9-16, p. 36266, § 30)

15-8-370 Interior wall and ceiling finish and trim.

   Interior wall and ceiling finish, floor covering, and trim shall comply with the requirements of Sections 15-8-380 to 15-8-430, inclusive.

(Prior code §  62-9; Amend Coun. J. 6-27-90, p. 17610)

15-8-380 Interior wall and ceiling finishes.

   Interior wall and ceiling finishes, as herein referred to, are defined as those materials applied over wall, partition and ceiling construction on the inside of a building or subdivision thereof including finishes utilized for decoration, acoustical correction, surface insulation and similar purposes. Wall finishes not exceeding 20 percent of the wall area and ceiling finishes not exceeding ten percent of the ceiling area of a room or space shall be classified as interior trim. Surface decoration consisting of paint, paper or similar surface treatment less than one-twenty-eighth-inch thickness, applied directly to the finish without intervening air space shall not be considered as a part of interior wall and ceiling finish unless such surface treatment is required for the purpose of increasing fire resistance.

(Prior code §  62-9.1)

15-8-390 Interior trim.

   Interior trim, as herein referred to, is defined as including moldings, cornices, wainscoting and other wall and ceiling finishes not exceeding 20 percent of the wall area or ten percent of the ceiling area of a room or space. Interior trim shall not include the following:

   (a)   Doors and frames;

   (b)   Window sash and frames;

   (c)   Casings not exceeding four inches in width around door and window openings;

   (d)   Baseboards not exceeding six inches in height.

(Prior code §  62-9.2)

15-8-400 Classification of materials.

   (a)   All materials used for interior wall and ceiling finish and for interior trim shall be classified in accordance with flame spread characteristics into the following classifications:

 

Classification	Flame Spread Rating	Smoke Developed
Class 1	0 to 25	200
Class 2	26 to 75	450
Class 3	76 to 200	450

 

   (b)   The classification of any specific material shall be determined in accordance with test procedure as provided in Section 15-12-320.

   (c)   All materials used as floor covering shall be classified in accordance with the critical radiant flux characteristics as follows:

   Class A interior floor finish: Critical radiant flux of 0.45 watts per square centimeter or higher.

   Class B interior floor finish: Critical radiant flux between 0.22 watts per square centimeter and 0.44 watts per square centimeter.

   Wherever the use of Class B interior floor finish is required, Class A interior floor finish material is permitted.

   (d)   The classification of specific floor covering materials shall be in accordance with test procedures as provided for in Section 15-12-344.

(Prior code §  62-9.3; Amend Coun. J. 6-27-90, p. 17610)

15-8-410 General requirements.

   Except in buildings of Type III-A, III-C or IV-B construction, all interior wall and ceiling finish shall be applied directly and securely to a noncombustible base or to furring or nailing strips not exceeding one inch in nominal thickness applied over a noncombustible base with all spaces behind the material filled with noncombustible material or firestopped at intervals not exceeding eight square feet in area. In buildings of Type III-A construction, interior wall and ceiling finish shall be applied directly to the wall or floor construction.

(Prior code §  62-9.4)