Excerpts from 2000 INTERNATIONAL BUILDING CODE®

704.2 Projections.

Cornices, eave overhangs, exterior balconies and similar architectural appendages extending beyond the floor area shall conform to the requirements of this section or Section 1406. Exterior egress balconies and exterior exit stair- ways shall also comply with Sections 1004.3.3 and 1005.3.6. Projections shall not extend beyond the distance determined by the following two methods, whichever results in the lesser projection:

1. A point one-third the distance to the property line from an assumed vertical plane located where protected openings are required in accordance with Section 704.8.2. More than 12 inches (305 mm) into areas where openings are prohibited.

704.2.1 Types I and II construction.

Projections from walls of Type I or II construction shall be of noncombustible materials or combustible materials as allowed by Sections 1406.3 and 1406.4.

704.2.2 Types III, IV and V construction.

Projections from walls of Type III, IV or V construction shall be of any approved material.

704.2.3 Combustible projections.

Combustible projections located where openings are not permitted or where protection of openings is required shall be of at least 1-hour fire-resistance-rated construction, Type IV construction or as required by Section 1406.3.

Exception: Type V construction shall be allowed for R-3 occupancies, as applicable in Section 101.2.