posted July 21, 2004 01:42 PM            

IRC 2000 #R308.1 under Exceptions: 2. Tempered spandrel glass may be identified by the manufacturer with a removable paper label.

I doubt you are going to find much spandrel glass in a residential setting but I am sure there are some exceptions out there.

Also, #R308.1.1 Identification of multipane assemblies. Multipane assemblies having individual panes not exceeding 1 square foot in exposed area shall have at least one pane in the assembly identified in accordance with Section R308.1. All other panes in the assembly shall be labeled “16 CFR 1201”.

posted July 21, 2004 02:11 PM         

According to code check they have to be tempered if they're less than 24" of door swing.

What about a bathroom window above the bath tub that's 55" above the tub floor?
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posted July 21, 2004 02:24 PM            

SECTION R308
GLAZING
[B] R308.1 Identification. Except as indicated in Section R308.1.1, each pane of glazing installed in hazardous locations as defined in Section R308.4 shall be provided with a manufacturer's or installer's label, designating the type and thickness of glass and the safety glazing standard with which it complies, which is visible in the final installation. The label shall be acid etched, sandblasted, ceramic-fired, embossed mark, or shall be of a type which once applied cannot be removed without being
destroyed.

That means it is required.

The exception Phillip mentioned ONLY refers to spandrel glass, or glass which is used to cover non-visible areas of a structure, the glass used, for example, to cover a wall area. This will not be found in the typical residence.

For a better idea of what this is referring to and to understand why these can have removable labels (and why you will not likely see them in a residence), go here what is spandrel glass?.

So, in a residence, unless you actually do find spandrel glass, yes, it needs to be marked.

Not withstanding those which fall into this exception:

R308.1.1 Identification of multipane assemblies. Multi-pane assemblies having individual panes not exceeding 1 square foot (0.09 m2) in exposed area shall have at least one pane in the assembly identified in accordance with Section R308.1. All other panes in the assembly shall be labeled "16
CFR 1201."

This exception would apply to those separate panels in a multi-panel door, say a 9 panel door, however, one must be marked with the full marking and the others marked (as Phillip said) with "16 CFR 1201".

The doors I've seen which try to get around the 'each pane shall be marked' and just mark one pane, forget to even mark the other panes with "16 CFR 120". If they are going to mark them with that, why not the same safety glass mark?