Thanks for the clarification John. I printed it and put it in my building code. But doesn't the building still just have a single use group is it's Mixed Use? Then the separated uses are built in accordance to the provisions for area, egress, construction type, etc.? The building codes don't allow for different construction types within the same mixed use building, right? Same as using two fire codes, 13R in the residential and 13 in the commercial for example. I don't mean to stray from the main topic but I think it was focused on the appropriate fire code.
We're Boca '93 up here, very similar statutes as IBC. I wish we were more current code-wise, there's a lot more supportive and interpretive information than using a 15 year old building code. Tom Duross Boston -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of John Drucker Sent: Saturday, February 10, 2007 4:45 PM To: [email protected] Subject: RE: Residential? Tom, A building can have many. Buildings are classified with respect to the occupancy (2000 & 2006 IBC Section 302). There are 10 occupancy groups. A number of those groups are broken down further, for example the Assembly Group (IBC Section 303) is broken down in 5 subgroups, A1,A2,A3,A4 and A5. AHJ's look at the proposed and or actual occupancy of a building and classify it accordingly. When an occupancy is not specifically listed in Chapter 3 the occupancy is classified to a group most resembling the fire safety and relative hazard involved. A building that contains more then one occupancy or use 2000 IBC 302.3 / 2006 IBC 508 is applied.titled "Mixed Use and Occupancy". The first step in the process is to determine if any Accessory Occupancies and or Incidental Uses exist. Accessory Occupancies, generally 10% or less of the main occupancy and or Incidental Uses, normally spaces used for special purposes such as mechanical rooms, storage rooms, trash rooms etc. utilize special provisions of the IBC. Incidental Use areas are classified in accordance with that portion of the building in which they are located. Incidental Use Areas require fire rated seperation and or suppression in accordance with Table 508.2.(2006) 302.1.1 (2000). Accessory Occupancies are addressed in IBC 508.3.1(2006) 302.2(2000). Beyond the Incidental and Accessory provisions building designers utilize the Non-Seperated or Seperated Occupancy provisions of the IBC. The former utilizes a formula based on individual occupancy ratios, the later based on rated fire separations. Hope that helps, John Drucker Fire Protection Subcode Official New Jersey -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Tom Duross Sent: Saturday, February 10, 2007 10:59 AM To: [email protected] Subject: Re: Residential? How can a building have 2 use groups? td > Aha, more information.... > > Lets see 1,231 sf > > 50 X 110 = 5,500 sf > > 1231/5500 = 22% > > Mixed Use > > NFPA-13 > > Next Question > > John Drucker > Fire Protection Subcode Official > New Jersey > > > Let's put this in perspective: > One 535 SF classroom > One 312 SF Conf room > One 160 SF Office > Two 106 SF offices > One 118 SF Laundry > That's substantially less than run of the mill hotel back of house. > > Are the business offices of a hotel, not to mention their conference > rooms, > incidental to the running of a hotel? Commercial laundries, not a 7' x 17' > cubby. > > glc > > > To me this sounds like a 13 system. Incidental is defined as "of a > minor, casual or subordinate nature". I'm not sure that offices and > classrooms fall under that category for an otherwise residential > occupancy since that could stand on their own. My thought is that an > incidental occupancy (such as an office or laundry room for a hotel) > is one that could not reasonably exist without the primary > (residential). I vote for mixed use, hence 13. > > At 04:05 PM 2/9/2007, you wrote: > >>We have a project in which the majority of the building is dorm rooms; >>2nd flr (top) is all dorms, with a few more dorm rooms and a few >>classrooms >>and offices on the first floor. Small basement is mechanical only. >>Entire building footprint is a whopping >> >>The classrooms are for the use of the students that reside in the dorm; >>Offices for faculty that teach there. >> >>Overall concept is suburban campus college has this building in the city > for >>students to study government and urban life. So the non-residential areas >>are incidental to the residential nature of the building. >> >>The Architect has deemed the building A3 for the first floor, R2 on 2nd >>floor. Naturally the one hour separation is at the first floor ceiling. >> >>If this sounds a little strange, at least it's not #13TR, elderly housing >>over tire storage:) This IS located in a locale where 13d tank/pumps feed > 3 >>story office buildings, with poly tanks located in restaurant storage >>area, >>and CPVC in OH2. Sure, that will make the judge understand ? >> >>Anyway, would % of use and other uses being for the occupants make this > look >>#13R to any of you? >> >>George Church >>Rowe Sprinkler >> _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum
