| Performance Condition |
Protection Level |
Hazard Level |
Description of Window Glazing Response |
| 1 |
Safe |
None |
Glazing does not break. No visible damage to glazing or frame. |
| 2 |
Very High |
None |
Glazing cracks but is retained by the frame. Dusting or very small fragments near sill or on floor acceptable. |
| 3a |
High |
Very Low |
Glazing cracks. Fragments enter space and land on floor no further than 3.3 ft. from the window. |
| 3b |
High |
Low |
Glazing cracks. Fragments enter space and land on floor no further than 10 ft. from the window. |
| 4 |
Medium |
Medium |
Glazing cracks. Fragments enter space and land on floor and impact a vertical witness panel at a distance of no more than 10 ft. from the window at a height no greater than 2 ft. above the floor. |
| 5 |
Low |
Low |
Glazing cracks and window system fails catastrophically. Fragments enter space impacting a vertical witness panel at a distance of no more than 10 ft. from the window at a height greater than 2 ft. above the floor. |