Is it the intent of R309.4 to require separation
for parking below habitable space when the area
used for parking is open on 2 or more sides?
Interpretation #6610
Published September 01, 2010
Original Request
- Code Version
- 2007
- Code
- RESIDENT
- Code Description
- Chapter
- 3
- Section
- R309.4
- Topic
Question
Answer Published 09/01/2010 at 6:50 PM
Yes.
Commentary
The question refers specifically to the residential code,
not the building code. The code section is specific to
carports, requiring them to be open on at least two sides.
If not open, it's considered a garage and must meet the
provisions for a garage. A carport does not require the
additional construction constraints that a garage does. We
have to remember that this is not a fire rating
requirement. Compliance with these requirements may provide
some value regarding fire separation, however, it is not
creating a "rated" separation between the garage and the
dwelling. Further, R309.4 requires a "carport" be
consrtructed as a garage except as provided for the floor.
That would incude the separation requirements of section
R309.2. the definition of "open garage" and following the
guidelines in section 406.1.4. ---- FBC "406.1.4
Separation" addresses this more clearly. it states as
follows: "3. A separation is not required between a Group R-
3 and U carport, provided the carport is entirely open on
two or more sides AND THERE ARE NOT ENCLOSED AREAS ABOVE." -
---- OPEN PARKING GARAGE. A structure or portion of a
structure with the openings as described in Section
406.3.3.1 on two or more sides that is used for the parking
or storage of private motor vehicles as described in
Section 406.3.4.