14B-4-404 Atriums.
The provisions of Section 404 of IBC are adopted by reference with the following modifications:
1.   Revise the exception to Section 404.2 by deleting "approved."
2.   Revise Section 404.3 to read:
"404.3 Automatic sprinkler protection.
An automatic sprinkler system shall be installed throughout the entire building.
Exception: Where the ceiling of the atrium is more than 55 feet (16 764 mm) above the floor, sprinkler protection at the ceiling of the atrium is not required."
3.   Revise exception 1 to Section 404.6 by replacing "smoke partition" with "smoke-resistive barrier."
4.   Revise Section 404.7 to read:
"404.7 Standby power.
Equipment required to provide smoke control shall be provided with standby power."