34 Pa. Code § 50.31
Walls and partitions enclosing vertical openings 9 square feet or more shall be constructed as set forth in the following table:
| Construction Type | Fireresistive Requirement | Fire Door Assembly |
| Fireresistive | 2-Hour Noncombustible | 1 1/2-hour B Label |
| Noncombustible | 1-Hour Noncombustible | 3/4-hour C Label |
| Protected Heavy Timber | 1-Hour Noncombustible | 3/4-hour C Label |
| Ordinary | 1-Hour | 3/4-hour C Label |
| Wood Frame | 1-Hour | 3/4-hour C Label |
This section cited in 34 Pa. Code § 50.32 (relating to vertical openings less than 9 square feet); 34 Pa. Code § 51.31 (relating to vertical openings); 34 Pa. Code § 52.31 (relating to vertical openings); 34 Pa. Code § 53.31 (relating to vertical openings); 34 Pa. Code § 54.31 (relating to vertical openings); 34 Pa. Code § 55.31 (relating to vertical openings); 34 Pa. Code § 57.31 (relating to vertical openings); 34 Pa. Code § 58.31 (relating to vertical openings); and 34 Pa. Code § 59.31 (relating to vertical openings).