§ 15-8-420

Requirements for interior wall and ceiling finish

Materials used for interior wall and ceiling finish shall be not less resistant to flame spread than the class of materials specified in this section:

a.

Stairways, elevator shafts, and enclosed connections from such stairway to outside exits of all buildings, Class 1;

b.

Institutional units, Class 1;

c.

Residential units, Class 1;

d.

Business units, industrial and storage units, Class 2;

e.

Assembly and mercantile units having a capacity exceeding 100 persons, Class 1;

f.

Public lobbies required as a means of exit in buildings of all occupancies having a capacity of more than 100 persons, and in all public corridors required as a means of exit, Class 1;

g.

All other rooms and spaces, materials used for interior wall and ceiling finish shall be not less resistant to flame spread than Class 3 materials; provided, however, that Class 2 and Class 3 materials shall be limited in area as follows:

1.

The total surface area of Class 2 materials used for interior wall and ceiling finish in any building shall not exceed 7,500 square feet except that when a building is divided into areas separated by partitions, floor and ceiling construction providing fire resistance of not less than two hours with all partition openings protected by Class C fire doors, interior wall and ceiling finish of Class 2 materials not exceeding 7,500 square feet in surface area may be used in each area so separated,

2.

The total surface area of Class 3 material used for interior wall and ceiling finish in any building shall not exceed 5,000 square feet except that when a building is divided into areas separated by partition, floor and ceiling construction providing fire resistance of not less than two hours with all partition openings protected with Class C fire doors, interior wall and ceiling finish of Class 3 materials not exceeding 5,000 square feet in surface area may be used in each area so separated.

Exception: In administrative offices, art galleries, libraries, and restaurants and also in not more than one room of each residential unit, Class 3, interior finish materials (not more combustible than wood) may be used on walls only, subject to the approval of the division marshal in charge of fire prevention;

h.

The interior wall and ceiling in hazardous use units, now existing or hereafter constructed, shall be of noncombustible (Class I) construction;

i.

In buildings which are equipped with a standard sprinkler system as defined in Article II of Chapter

15-16 of this Code, Class 2.

(Prior code § 62-9.5)

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