Mr. Inspector
SAWHORSE
Doing a plan review for a residential detached garage that may be to close to the lot line per 2009 IRC 302.1:
R302.1 Exterior walls.
Construction, projections, openings and penetrations of exterior walls of dwellings and accessory buildings shall comply with Table R302.1.
Exceptions:
1. Walls, projections, openings or penetrations in walls perpendicular to the line used to determine the fire separation distance .
2. Walls of dwellings and accessory structures located on the same lot .
3. Detached tool sheds and storage sheds, playhouses and similar structures exempted from permits are not required to provide wall protection based on location on the lot . Projections beyond the exterior wall shall not extend over the lot line .
4. Detached garages accessory to a dwelling located within 2 feet (610 mm) of a lot line are permitted to have roof eave projections not exceeding 4 inches (102 mm).
5. Foundation vents installed in compliance with this code are permitted.
TABLE R302.1
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 form both sides < 5 feet
(Not fire-resistance rated) 0 hours ³ 5 feet
Projections (Fire-resistance rated) 1 hour on the underside ³ 2 feet to 5 feet
(Not fire-resistance rated) 0 hours 5 feet
Openings in walls Not allowed N/A < 3 feet
25% maximum of wall area 0 hours 3 feet
Unlimited 0 hours 5 feet
Penetrations All Comply with Section R317.3 < 5 feet
None required 5 feet
SECTION R202
DEFINITIONS
.
FIRE SEPARATION DISTANCE. The distance measured from the building face to one of the following:
1. To the closest interior lot line ; or
2. To the centerline of a street, an alley or public way; or
3. To an imaginary line between two buildings on the lot .
So where is the "Fire Separation Distance" is measured form? What is meant by the closest interior lot line? Do I measure from the actual lot line?
R302.1 Exterior walls.
Construction, projections, openings and penetrations of exterior walls of dwellings and accessory buildings shall comply with Table R302.1.
Exceptions:
1. Walls, projections, openings or penetrations in walls perpendicular to the line used to determine the fire separation distance .
2. Walls of dwellings and accessory structures located on the same lot .
3. Detached tool sheds and storage sheds, playhouses and similar structures exempted from permits are not required to provide wall protection based on location on the lot . Projections beyond the exterior wall shall not extend over the lot line .
4. Detached garages accessory to a dwelling located within 2 feet (610 mm) of a lot line are permitted to have roof eave projections not exceeding 4 inches (102 mm).
5. Foundation vents installed in compliance with this code are permitted.
TABLE R302.1
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 form both sides < 5 feet
(Not fire-resistance rated) 0 hours ³ 5 feet
Projections (Fire-resistance rated) 1 hour on the underside ³ 2 feet to 5 feet
(Not fire-resistance rated) 0 hours 5 feet
Openings in walls Not allowed N/A < 3 feet
25% maximum of wall area 0 hours 3 feet
Unlimited 0 hours 5 feet
Penetrations All Comply with Section R317.3 < 5 feet
None required 5 feet
SECTION R202
DEFINITIONS
.
FIRE SEPARATION DISTANCE. The distance measured from the building face to one of the following:
1. To the closest interior lot line ; or
2. To the centerline of a street, an alley or public way; or
3. To an imaginary line between two buildings on the lot .
So where is the "Fire Separation Distance" is measured form? What is meant by the closest interior lot line? Do I measure from the actual lot line?
