Michigan Administrative Code
Department - Licensing and Regulatory Affairs
Bureau of Construction Codes
Construction Code Commission General Rules
Construction Code
Part 5 - RESIDENTIAL CODE
Section R. 408.30544b - Exterior walls
Current through Vol. 24-16, September 15, 2024
Rule 544b.
Section R302.5.1 of the code is amended and table R302.1(1) is added to read as follows:
R302.5.1. Opening protection. Openings from a private garage directly into a room used for sleeping purposes shall not be permitted. Other openings between the garage and residence shall be equipped with solid wood doors not less than 1 3/8 inches (35 mm) in thickness, solid or honeycomb-core steel doors not less than 1 3/8 inches (35 mm) thick, or 20-minute fire-rated doors.
TABLE R302.1(1)
EXTERIOR WALLS
|
EXTERIOR WALL ELEMENT |
MINIMUM FIRE-RESISTANCE RATING |
MINIMUM FIRE SEPARATION DISTANCE |
|
|
Walls |
Fire-resistance rated |
1 hour-tested in accordance with ASTM E 119 or UL 263 with exposure from both sides |
[LESS THAN] 5 feet |
|
Not fire-resistance rated |
0 hours |
[GREATER THAN EQUAL TO] 5 feet |
|
|
Projections |
Not alloweda |
NA |
[LESS THAN] 2 feet |
|
Fire-resistance rated |
1 hour on the underside |
[GREATER THAN EQUAL TO] 2 feet to [LESS THAN] 5 feet |
|
|
Not fire-resistance rated |
0 hours |
[GREATER THAN EQUAL TO] 5 feet |
|
|
Opening in walls |
Not allowed |
N/A |
[LESS THAN] 3 feet |
|
25% maximum of wall area |
0 hours |
3 feet |
|
|
Unlimited |
0 hours |
5 feet |
|
|
Penetrations |
All |
Comply with Section R302.4 |
[LESS THAN] 5 feet |
|
None required |
5 feet |
||
For SI: 1 foot = 304.8 mm
N/A = Not applicable
