2000 International Building Code
1609.1.4 Protection of Openings.
In wind-borne debris regions, glazing in the lower 60 feet in buildings
shall be assumed to be openings unless such glazing is impact
resistant or protected with an impact-resistant covering meeting
the requirements of an approved impact-resisting standard or
ASTM E 1996 and of ASTM E 1886 referenced therein as follows:
1. Glazed openings located within 30 feet of grade shall meet the
requirements of the Large Missile Test of ASTM E 1996.
2. Glazed openings located more than 30 feet above grade shall meet
the provisions of the Small Missile Test of ASTM E 1886.
HURRICANE-PRONE REGIONS. Areas vulnerable to hurricanes defined as:
1. The U.S. Atlantic Ocean and Gulf of Mexico coasts where
the basic wind speed is greater than 90 mph and
2. Hawaii, Puerto Rico, Guam, Virgin Islands and America Samoa.
WIND-BORNE DEBRIS REGION. Areas within hurricane-prone regions
within 1 mile of the coastal mean high water line where the basic wind speed
is 110 miles (48.4 m/s) per hour or greater, or where basic wind speed
is 120 miles (52.8 m/s) per hour or greater, or Hawaii.