IBC - Tempered glass requirement
The International Building Code says, in part, if a window is less than 18 inches from the floor and has 9 square feet of glass, the glass must be tempered glass. If the window is a single hung or a double hung, is that 9 square feet in the single sash on the bottom? Or 9 square feet total, in both sashes?
Seeing the pricing upgrade for tempered glass, I am trying to be sure I understand exactly where it will be needed!