Page 92 - 2018_IRC

BUILDING PLANNING

TABLE R308.3.1(1)
MINIMUM CATEGORY CLASSIFICATION OF GLAZING USING CPSC 16 CFR 1201
GLAZING IN
GLAZING IN
DOORS AND
EXPOSED SURFACE STORM OR GLAZING IN GLAZED PANELS GLAZED PANELS ENCLOSURES SLIDING GLASS
REGULATED BY
REGULATED BY
AREA OF ONE SIDE COMBINATION DOORS SECTION R308.4.3 SECTION R308.4.2 REGULATED BY DOORS PATIO TYPE
OF ONE LITE DOORS (Category Class) (Category Class) (Category Class) SECTION 308.4.5 (Category Class)
(Category Class)
(Category Class)
9 square feet or less I I NR I II II
More than 9 square feet II II II II II II
For SI: 1 square foot = 0.0929 m . 2
NR = No Requirement.
TABLE R308.3.1(2)
MINIMUM CATEGORY CLASSIFICATION OF GLAZING USING ANSI Z97.1
GLAZED PANELS REGULATED BY GLAZED PANELS REGULATED BY DOORS AND ENCLOSURES REGULATED
EXPOSED SURFACE AREA SECTION R308.4.3 SECTION R308.4.2 BY SECTION R308.4.5 a
OF ONE SIDE OF ONE LITE
(Category Class) (Category Class) (Category Class)
9 square feet or less No requirement B A
More than 9 square feet A A A
For SI: 1 square foot = 0.0929 m . 2
a. Use is permitted only by the exception to Section R308.3.1.

Glazing in this application shall comply with degrees (0.79 rad) of horizontal] surface
Section R308.4.3. adjacent to the glass exterior.
4. Glazing that is adjacent to the fixed panel of patio R308.4.4 Glazing in guards and railings. Glazing in
doors. guards and railings, including structural baluster panels
R308.4.3 Glazing in windows. Glazing in an individual and nonstructural in-fill panels, regardless of area or
fixed or operable panel that meets all of the following con- height above a walking surface shall be considered to be a
ditions shall be considered to be a hazardous location: hazardous location.
1. The exposed area of an individual pane is larger than R308.4.4.1 Structural glass baluster panels. Guards
9 square feet (0.836 m ). with structural glass baluster panels shall be installed
2
with an attached top rail or handrail. The top rail or
2. The bottom edge of the glazing is less than 18 inches handrail shall be supported by not less than three glass
(457 mm) above the floor. baluster panels, or shall be otherwise supported to
3. The top edge of the glazing is more than 36 inches remain in place should one glass baluster panel fail.
(914 mm) above the floor. Exception: An attached top rail or handrail is not
4. One or more walking surfaces are within 36 inches required where the glass baluster panels are lami-
(914 mm), measured horizontally and in a straight nated glass with two or more glass plies of equal
line, of the glazing. thickness and of the same glass type.
Exceptions: R308.4.5 Glazing and wet surfaces. Glazing in walls,
1. Decorative glazing. enclosures or fences containing or facing hot tubs, spas,
whirlpools, saunas, steam rooms, bathtubs, showers and
2. Where glazing is adjacent to a walking sur- indoor or outdoor swimming pools where the bottom
face and a horizontal rail is installed 34 to exposed edge of the glazing is less than 60 inches (1524
38 inches (864 to 965 mm) above the walk- mm) measured vertically above any standing or walking
ing surface. The rail shall be capable of surface shall be considered to be a hazardous location. This
withstanding a horizontal load of 50 shall apply to single glazing and each pane in multiple glaz-
pounds per linear foot (730 N/m) without ing.
contacting the glass and have a cross-sec-
1
tional height of not less than 1 / inches (38 Exception: Glazing that is more than 60 inches (1524
2
mm). mm), measured horizontally and in a straight line, from
3. Outboard panes in insulating glass units the water’s edge of a bathtub, hot tub, spa, whirlpool or
swimming pool or from the edge of a shower, sauna or
and other multiple glazed panels where the steam room.
bottom edge of the glass is 25 feet (7620
mm) or more above grade, a roof, walking R308.4.6 Glazing adjacent to stairs and ramps. Glaz-
surfaces or other horizontal [within 45 ing where the bottom exposed edge of the glazing is less
than 36 inches (914 mm) above the plane of the adjacent

2018 INTERNATIONAL RESIDENTIAL CODE ® 67
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