Table 3-3 lists construction classes that shall be established for classifying buildings and spaces by construction in accordance with the provisions of articles fifteen, sixteen and seventeen of this subchapter.
| TABLE 3-3 CONSTRUCTION CLASSES |
| Construction Group |
Class |
| I-Noncombustible |
I-A— (4-hr. protected) |
| I-B— (3-hr. protected) |
| I-C— (2-hr. protected) |
| I-D— (1-hr. protected) |
| I-E— (unprotected) |
| II-Combustible |
II-A— (heavy timber) |
| II-B— (protected wood joist) |
| II-C— (unprotected wood joist) |
| II-D— (protected wood frame) |
| II-E— (unprotected wood frame) |