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#80041 - 02/15/02 02:17 PM Definition of a basement  
Looee  Offline
Member
Joined: Feb 2002
Posts: 11
Willmar, MN, 56201
I am enrolled in the electrician program at a tech school and was wondering if there is a good definition of what a basement is? I spent at least an hour going through the NEC trying to find it, but I'm stuck. Our teacher said he would give some bonus points to anyone that could find and answer and he didn't care how we got it.


Lee


2017 / 2014 NEC & Related Books and Study Guides

#80042 - 02/15/02 04:26 PM Re: Definition of a basement  
Joe Tedesco  Offline
Member
Joined: Oct 2000
Posts: 2,749
Boston, Massachusetts USA
A story of a building or structure having one-half or more of its height below ground level and to which access for fire-fighting purposes is unduly restricted.

See Article 100 Scope: ..... It is not intended to include commonly defined general terms or commonly defined technical terms from related codes and standards.......

I found this definition among many that are defined in the National Fire Codes.


Joe Tedesco, NEC Consultant

#80043 - 02/15/02 04:33 PM Re: Definition of a basement  
dana1028  Offline
Member
Joined: Jan 2002
Posts: 163
San Carlos, CA
a basement is defined in the building codes (and I assume the NEC is not going to argue with the building codes over this definition since they have not bothered creating a different definition)-

Uniform Bldg. Code -
"Basement is any floor level below the first story in a bldg., except that a floor level in a bldg. having only one floor level shall be classified as a basement unless such floor level qualifies as a first story as defined herein." . . .. now is that confusing or what? . . . however it does go on (in definitions of story, first story) to define what constitutes the 1st floor...I'm sure the bldg. codes in your area will define basements/1st story.


#80044 - 02/15/02 04:43 PM Re: Definition of a basement  
resqcapt19  Offline
Member
Joined: Nov 2000
Posts: 2,148
IL
In 336-5(a) the NEC defines the first floor.
"For the purpose of this article, the first floor of a building shall be that floor that has 50 percent or more of the exterior wall surface area level with or above finished grade."
Can we then assume that if the floor in question is below the first floor that it is a basement?
Don(resqcapt19)


Don(resqcapt19)

#80045 - 02/15/02 05:53 PM Re: Definition of a basement  
Elzappr  Offline
Member
Joined: Dec 2001
Posts: 270
Oregon
So how do we measure the "wall surface area" of the 1st floor? Do we measure from finished floor to finished floor? Or are the basement joists considered part of the first floor?


#80046 - 02/15/02 08:22 PM Re: Definition of a basement  
Looee  Offline
Member
Joined: Feb 2002
Posts: 11
Willmar, MN, 56201
By the way, we are using the 2002 NEC, in case there is any difference in the older code books


Lee



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