The window schedule excerpts below are from a small office building we are working on, specifying standard aluminum storefront systems at the exterior. The code official seems to be requiring tempered glass at all of the lower panels, as you can see denoted by the (T) symbol. Here is what I cannot figure out, where would that be required? These windows are within 36" of a walking surface. But, according to 2406.3.7, to be required as safety glazing they must meet all of the conditions:
1. greater than 9 s.f.
2. lower edge is less than 18" a.f.f.
3. top edge is greater than 36" a.f.f.
4. walking surface within 36".
The standard design detail for our building has the lower horizontal mullion at 2'-2" a.f.f. Doesn't this mean that neither the lower or upper panels must be tempered?
Obviously, the panels subject to the door swings and stair requirements of 2406.3.5 & 6 would be tempered. But these elevations below are from standard open office spaces.