International Building Code 2403.1
Identification. Each pane shall bear the manufacturer’s
mark designating the type and thickness of the glass or glazing
material. The identification shall not be omitted unless
approved and an affidavit is furnished by the glazing contractor
certifying that each light is glazed in accordance with approved
construction documents that comply with the provisions of this
chapter. Safety glazing shall be identified in accordance with
Each pane of tempered glass, except tempered spandrel
glass, shall be permanently identified by the manufacturer. The
identification mark shall be acid etched, sand blasted, ceramic
fired, laser etched, embossed or of a type that, once applied,
cannot be removed without being destroyed.
Tempered spandrel glass shall be provided with a removable
paper marking by the manufacturer.
International Building Code 2403.2
Glass supports. Where one or more sides of any pane
of glass are not firmly supported, or are subjected to unusual
load conditions, detailed construction documents, detailed
shop drawings and analysis or test data assuring safe performance
for the specific installation shall be prepared by a registered
International Building Code 2403.3
Framing. To be considered firmly supported, the framing
members for each individual pane of glass shall be
designed so the deflection of the edge of the glass perpendicular
to the glass pane shall not exceed 1/175 of the glass edge
length or 3/4 inch (19.1 mm), whichever is less, when subjected
to the larger of the positive or negative load where loads are
combined as specified in Section 1605.
International Building Code 2403.4
Interior glazed areas. Where interior glazing is
installed adjacent to a walking surface, the differential deflection
of two adjacent unsupported edges shall not be greater than
the thickness of the panels when a force of 50 pounds per linear
foot (plf) (730 N/m) is applied horizontally to one panel at any
point up to 42 inches (1067 mm) above the walking surface.
International Building Code section2403.5
Louvered windows or jalousies. Float, wired and patterned
glass in louvered windows and jalousies shall be no thinner
than nominal 3/16 inch (4.8 mm) and no longer than 48
inches (1219 mm). Exposed glass edges shall be smooth.
Wired glass with wire exposed on longitudinal edges shall
not be used in louvered windows or jalousies.
Where other glass types are used, the design shall be submitted
to the building official for approval.