Minn. R. agency 151, ch. 1309, pt. 1309.0302
Table R302.1(1) and Table R302.1(2) are amended to read as follows:
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, UL 263, or Section 703.3 of the International Building Code with exposure from both sides | 0 feet |
| Not fire-resistance rated | 0 hours | >= 5 feet | |
| Not allowed | NA | < 2 feet | |
| Projections | Fire-resistance rated | 1 hour on the underside, or heavy timber, or fire-retardant-treated wooda,b,c | = 2 feet to < 5 feet |
| Not fire-resistance rated | 0 hours | >= 5 feet | |
| Not allowed | NA | < 3 feet | |
| Openings in walls | 25% Maximum of Wall Area | 0 hours | 3 feet |
| Unlimited | 0 hours | 5 feet | |
| Penetrations | All | Comply with Section R302.4 | < 3 feet |
| None required | 3 feet | ||
For SI: 1 foot = 304.8 mm.
NA = Not Applicable.
a The fire-resistance rating shall be permitted to be reduced to 0 hours on the underside of the eave overhang if fireblocking is provided from the wall top plate to the underside of the roof sheathing.
b The fire-resistance rating shall be permitted to be reduced to 0 hours on the underside of the rake overhang where gable vent openings are not installed.
c One hour on the underside equates to one layer of 5/8-inch type X gypsum sheathing. Openings are not allowed.
TABLE R302.1(2)
EXTERIOR WALLS - DWELLINGS WITH FIRE SPRINKLERS
| EXTERIOR WALL ELEMENT | MINIMUM FIRE-RESISTANCE RATING | MINIMUM FIRE SEPARATION DISTANCE | |
| Walls | Fire-resistance rated | 1 hour - tested in accordance with ASTM E 119, UL 263, or Section 703.3 of the International Building Code with exposure from both sides | 0 feet |
| Not fire-resistance rated | 0 hours | 3 feet a | |
| Not allowed | NA | < 2 feet | |
| Projections | Fire-resistance rated | 1 hour on the underside, or heavy timber, or fire-retardant-treated wooda,b,c | = 2 feet a |
| Not fire-resistance rated | 0 hours | 3 feet | |
| Openings in walls | Not allowed | N/A | < 3 feet |
| Unlimited | 0 hours | 3 feet a | |
| Penetrations | All | Comply with Section R302.4 | < 3 feet |
| None required | 3 feet a | ||
For SI: 1 foot = 304.8 mm.
NA = Not Applicable.
a For residential subdivisions where all dwellings are equipped throughout with an automatic sprinkler system installed in accordance with Section P2904, the fire separation distance for exterior walls not fire-resistance rated and for fire-resistance-rated projections shall be permitted to be reduced to 0 feet, and unlimited unprotected openings and penetrations shall be permitted, where the adjoining lot provides an open setback yard that is 6 feet or more in width on the opposite side of the property line.
b The fire-resistance rating shall be permitted to be reduced to 0 hours on the underside of the eave overhang if fireblocking is provided from the wall top plate to the underside of the roof sheathing.
c The fire-resistance rating shall be permitted to be reduced to 0 hours on the underside of the rake overhang where gable vent openings are not installed.
d One hour on the underside equates to one layer of 5/8-inch type X gypsum sheathing. Openings are not allowed.
Section R302.2.3 is amended to read as follows:
Section R302.2 is amended by adding a subsection to read as follows:
Section R302.3 is amended by adding a subsection to the end of the section to read as follows:
Section R305.5.1 is amended 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.
Section R302.6 and Table R302.6 are amended to read as follows:
TABLE R302.6a
DWELLING/GARAGE SEPARATION MATERIAL
| SEPARATION | MATERIAL |
| From the residence and attics | Not less than 1/2-inch gypsum board or equivalent applied to the garage side. Vertical separation between the garage and the residence attic shall extend to the roof sheathing or rafter blocking. |
| From all habitable rooms above the garage | Not less than 5/8-inch type X gypsum board or equivalent. |
| Structural members supporting floor/ceiling assemblies or garage ceiling used for separation required by this section | Not less than 1/2-inch gypsum board or equivalent applied to the garage side of structural members supporting the floor/ceiling assemblies or garage ceiling. Structural members include, but are not limited to: walls, columns, beams, girders, and trusses. |
| Garages located less than 3 feet from a dwelling unit on the same lot | Not less than 1/2-inch gypsum board or equivalent applied to the interior side of exterior walls that are within this area. This provision does not apply to garage walls that are perpendicular to the adjacent dwelling unit wall. |
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm.
a Attachment of gypsum board shall comply with Table R702.3.5.
Minn. R. agency 151, ch. 1309, pt. 1309.0302
Statutory Authority: MS s 16B.59; 16B.61; 16B.64; 326B.02; 326B.101; 326B.106; 326B.13