Where both unprotected and protected openings are located in the exterior wall in any story of a building, the total area of openings shall be determined in accordance with the following:
| (Ap/ap) + (Au/au) ≤ 1 | (Equation 7-2) |
where:
| Ap | = | Actual area of protected openings, or the equivalent area of protected openings, Ae (see Section 705.7). |
| ap | = | Allowable area of protected openings. |
| Au | = | Actual area of unprotected openings. |
| au | = | Allowable area of unprotected openings. |