University of Virginia Library

Sec. 494(26). Roof openings.

All openings in roofs for the admission of light or air other
than those provided for in subsection 22 of this section, shall
have incombustible frames and sash glazed with wired glass; or
ordinary glass may be used, if protected above and below by
galvanized steel wire screens with a mesh not exceeding one
inch, and the wire not smaller than No. 12 gauge. The top
screen shall be installed as specified in subsection 19 of this section.