Labeled frames are available with transom
areas, sidelight areas, or a combination of
both. The transom and sidelight areas can be
furnished with listed panel assemblies or listed
glass, depending on the desired hourly rating.
Frames with solid transom panel and/or side
panels may be used in openings rated up to
and including 1-1/2-hour. Some manufacturers
have the capability to provide frames with
solid transom panels that have a 3-hour rating.
Frames with labeled glass transom lights
and/or sidelights may be used with doors that
have up to a one-hour rating. Examples of
individual visible glass light areas are shown
in table 3. Transom/sidelight frames may also
have a rating of twenty minutes without a hose
stream. The glass openings allowed are only
limited by the individual manufacturer’s listing.
The overall size of transom and sidelight
frames is limited to the maximum size that a
manufacturer has successfully fire tested.
Since the size may vary, it is important to
consult the manufacturer when writing specifications.
The label applied to transom sidelight assemblies
will state whether panels or glass are to
be used in the frame. If the frame contains
both panels and glass, the label for glass lights
is used since it is the most limiting rating.