One-Family Dwelling vs Multi-Family Dwelling

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finhead

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The definitions for one-family, two-family, and multi-family dwellings in Article 100 are easy enough to understand until you look at the definition of building - also in Article 100.

Here is the question. If a structure is separated into four areas by firewalls, and each area contains a dwelling unit, is this an example of a multifamily dwelling, or four single-family dwellings?
Thanks
Brian Dolan
 
Re: One-Family Dwelling vs Multi-Family Dwelling

In my opinion, this depends on what you call a "firewall". People make the mistake of using this term loosely. A true firewall is one that has structural independance, meaning that either side of the wall could completley fail and the wall would still stand. With the popularuty (and the 2003 IBC requirement) of fire sprinkling these types of buildings, you are seeing less and less true firewalls. What you are probably refering to is a "fire barrier" or a "fire partition", in which case it remains a single building.

EDIT: It also depends on which building code it is built under.

[ November 29, 2005, 09:04 AM: Message edited by: ryan_618 ]
 
Re: One-Family Dwelling vs Multi-Family Dwelling

I posted info on this scenario under "condo metering" in the construction/ management forum. I don't know how to post the link, if someone could explain...? Or post the link on how to post a link. :)
 
Re: One-Family Dwelling vs Multi-Family Dwelling

Also, the building code defines "multiple single family dwellings" which are basically "condo's" with no common areas. Think "townhouse". One unit of a multiple single family dwelling must be wired just as a sinle family dweling. For example each unit needs fron and rear outdoor receptacle.
 
Re: One-Family Dwelling vs Multi-Family Dwelling

J, the simplest way to post a link is to merely type it in, or copy'n'paste it, like this:

{Moderator's Note: I had to edit out your example, Larry, since it leads to your business web site, and since we do not allow advertisements.}

[ November 29, 2005, 11:09 AM: Message edited by: charlie b ]
 
Re: One-Family Dwelling vs Multi-Family Dwelling

Another way is to go to the web site and copy its address from the browser's address bar. Then go back to the NEC Forum, hit the "Post Reply" button, type in whatever other text you want, then hit the "URL" button that is below the box you are typing in. You can then paste the web address into the window that pops up.
 
Re: One-Family Dwelling vs Multi-Family Dwelling

Originally posted by LarryFine:
{Moderator's Note: I had to edit out your example, Larry, since it leads to your business web site, and since we do not allow advertisements.}
Click to expand...
Oops! My bad! :eek: Sorry, and thanx for sparing me from the website critics. :D
 
Re: One-Family Dwelling vs Multi-Family Dwelling

Around here, you have what might be called "semi-detached" housing. Where each unit is separated by the firewall, and can be individually sold with its own property deed. (Single dwelling)

When so classified in this manner, each unit can be served with its own electric service meter, and disconnecting means. They do not have to be grouped together with any other unit, since the others have their own yards, property lines, etc.

OTOH, units that are built on a single piece of property and cannot be sold with its own deed are generally classified as duplex, quads, or the like, depending on the total number involved. Those meters and service disconnects have to be grouped at one location, and the power company will only serve each building with a single lateral. (Multi-dwelling)

Your mileage may vary, depending on your local codes and definitions. :roll:
 
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