International Building Code Section 2610


International Building Code 2610.1

Light-transmitting plastic glazing of skylight
assemblies. Skylight assemblies glazed with light-transmitting
plastic shall conform to the provisions of this section and Section
2606. Unit skylights glazed with light-transmitting plastic
shall also comply with Section 2405.5.
Exception: Skylights in which the light-transmitting plastic
conforms to the required roof-covering class in accordance
with Section 1505.

International Building Code 2610.2

Mounting. The light-transmitting plastic shall be
mounted above the plane of the roof on a curb constructed in
accordance with the requirements for the type of construction
classification, but at least 4 inches (102 mm) above the plane of
the roof. Edges of light-transmitting plastic skylights or domes
shall be protected by metal or other approved noncombustible
material, or the light-transmitting plastic dome or skylight shall
be shown to be able to resist ignition where exposed at the edge
to a flame from a ClassB brand as described inASTME 108 or
UL 790.
Exceptions:
1. Curbs shall not be required for skylights used on roofs
having a minimum slope of three units vertical in 12
units horizontal (25-percent slope) in occupancies in
Group R-3 and on buildings with a nonclassified roof
covering.
2. The metal or noncombustible edge material is not
required where nonclassified roof coverings are permitted.

International Building Code 2610.3

Slope. Flat or corrugated light-transmitting plastic skylights
shall slope at least four units vertical in 12 units horizontal
(4:12). Dome-shaped skylights shall rise above the mounting
flange a minimum distance equal to 10 percent of the maximum
span of the dome but not less than 3 inches (76 mm).
Exception: Skylights that pass the Class B Burning Brand
Test specified in ASTM E 108 or UL 790.

International Building Code 2610.4

Maximum area of skylights. Each skylight shall have
a maximum area within the curb of 100 square feet (9.3 m2).
Exception: The area limitation shall not apply where the
building is equipped throughout with an automatic sprinkler
system in accordance with Section 903.3.1.1 or the building
is equipped with smoke and heat vents in accordance with
Section 910.

International Building Code 2610.5

Aggregate area of skylights. The aggregate area of
skylights shall not exceed 331/3 percent of the floor area of the
room or space sheltered by the roof in which such skylights are
installed where Class CC1 materials are utilized, and 25 percent
where Class CC2 materials are utilized.
Exception: The aggregate area limitations of light-transmitting
plastic skylights shall be increased 100 percent
beyond the limitations set forth in this section where the
building is equipped throughout with an automatic sprinkler
system in accordance with Section 903.3.1.1 or the building
is equipped with smoke and heat vents in accordance with
Section 910.

International Building Code 2610.6

Separation. Skylights shall be separated from each
other by a distance of not less than 4 feet (1219 mm) measured
in a horizontal plane.
Exceptions:
1. Buildings equipped throughout with an automatic
sprinkler system in accordance with Section
903.3.1.1.
2. In Group R-3, multiple skylights located above the
same room or space with a combined area not exceeding
the limits set forth in Section 2610.4.

International Building Code 2610.7

Location. Where exteriorwall openings are required to
be protected in accordance with Section 704, a skylight shall
not be installed within 6 feet (1829 mm)of such exteriorwall.

International Building Code 2610.8

Combinations of roof panels and skylights. Combinations
of light-transmitting plastic roof panels and skylights
shall be subject to the area and percentage limitations and separation
requirements applicable to roof panel installations.