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715.5.4 Wired Glass
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Steel window frame assemblies of 0.125-inch (3.2 mm) minimum solid section or of not less than nominal 0.048-inch-thick (1.2 mm) formed sheet steel members fabricated by pressing, mitering, riveting, interlocking or welding and having provision for glazing with 1/4-inch (6.4 mm) wired glass where securely installed in the building construction and glazed with 1/4-inch (6.4 mm) labeled wired glass shall be deemed to meet the requirements for a 3/4-hour fire window assembly. Wired glass panels shall conform to the size limitations set forth in Table 715.5.4.
| OPENING FIRE PROTECTION RATING | MAXIMUM AREA (square inches) |
MAXIMUM HEIGHT (inches) |
MAXIMUM WIDTH (inches) |
| 3 hours | 0 | 0 | 0 |
| 11/2-hour doors in exterior walls | 0 | 0 | 0 |
| 1 and 11/2 hours | 100 | 33 | 10 |
| 3/4 hour | 1,296 | 54 | 54 |
| 20 minutes | Not Limited | Not Limited | Not Limited |
| Fire window assemblies | 1,296 | 54 | 54 |
For SI: 1 inch = 25.4 mm, 1 square inch = 645.2 mm2.