| SECTION 717 CONCEALED SPACES
717.2.5
Ceiling and floor openings. Where annular space protection
is provided in accordance with Exception 6 of Section
707.2, Exception 1 of Section
712.4.1.2, or Section 712.4.2,
fireblocking shall be installed at openings around vents,
pipes, ducts, chimneys and fireplaces at ceiling and floor
levels, with an approved material to resist the free passage
of flame and the products of combustion. Factory-built chimneys
and fireplaces shall be fireblocked in accordance with UL
103 and UL 127.
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