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Inspection Question of the Day These are inspection questions posted daily by members of InterNACHI's Educational Committee.

 
View Poll Results: See Post #1 for question and answer below.
20 minute 2 5.71%
30 minute 0 0%
60 minute 6 17.14%
120 minute 18 51.43%
90 minute 9 25.71%
Voters: 35. You may not vote on this poll

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  #1  
Old 11/2/07, 7:31 AM
John Bowman's Avatar
John Bowman John Bowman is offline
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Default Commercial Inspection - Doors 2

Question:
Doors located in 2HR rated occupancy separation walls shall have the following rating...

Choices:
20 mins
30 mins
60 mins
120 mins
90 mins
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  #2  
Old 11/2/07, 3:13 PM
Bruce M. Graham Bruce M. Graham is offline
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Default Re: Commercial Inspection - Doors 2

. .



http://www.nachi.org/forum/image.php?type=sigpic&userid=6376&dateline=1330979  258
Professional Inspection Services, LLC dba
1st Inspection Services
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352 871 8989
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www.1stinspectionsfl.com
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  #3  
Old 11/2/07, 6:37 PM
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Marcel R. Cyr Marcel R. Cyr is online now
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Default Re: Commercial Inspection - Doors 2

John, that is a good one. It is obvious to me that you have picked a good poll.

Thanks

Marcel
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  #4  
Old 11/3/07, 9:58 AM
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Barry Adair Barry Adair is offline
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Default Re: Commercial Inspection - Doors 2

The answer is contained within this doc

http://www.steeldoor.org/res/118.pdf



ADAIR INSPECTION
972-487-5634

Commercial-Residential-Construction-EIFS-Infrared Thermography
TREC # 4563
EDI: EIFS-MA TX # 39

2008 US Member of the Year

life is the random lottery of events followed by numerous narrow escapes accept the good
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  #5  
Old 11/3/07, 10:42 AM
Marcel R. Cyr's Avatar
Marcel R. Cyr Marcel R. Cyr is online now
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Default Re: Commercial Inspection - Doors 2

Quote:
Originally Posted by badair
The answer is contained within this doc

http://www.steeldoor.org/res/118.pdf
Barry;

I think you have just closed the Poll.

I know I am one of the four on the 90 min. and was hoping to see how many were going to vote for the 120.

Oh well.

Marcel
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  #6  
Old 11/5/07, 7:30 AM
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Barry Adair Barry Adair is offline
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Default Re: Commercial Inspection - Doors 2

Quote:
Originally Posted by mcyr
Barry;

I think you have just closed the Poll.

I know I am one of the four on the 90 min. and was hoping to see how many were going to vote for the 120.

Oh well.

Marcel

My poll says badair waits 72 hours before posting how about yours



ADAIR INSPECTION
972-487-5634

Commercial-Residential-Construction-EIFS-Infrared Thermography
TREC # 4563
EDI: EIFS-MA TX # 39

2008 US Member of the Year

life is the random lottery of events followed by numerous narrow escapes accept the good

Last edited by badair; 11/5/07 at 7:34 AM..
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  #7  
Old 11/5/07, 10:17 AM
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Mike Hazelwood Mike Hazelwood is offline
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Default Re: Commercial Inspection - Doors 2

Just a curious question....Why is the door only required to be 1.5 hour rated and the walls are 2 hour rated? A chain is as strong as its weakest link.
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  #8  
Old 11/5/07, 12:14 PM
Marcel R. Cyr's Avatar
Marcel R. Cyr Marcel R. Cyr is online now
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Default Re: Commercial Inspection - Doors 2

Quote:
Originally Posted by mhazelwood
Just a curious question....Why is the door only required to be 1.5 hour rated and the walls are 2 hour rated? A chain is as strong as its weakest link.
This might help a little.

It is common for a fire door to have a fire protection rating lower than the wall fire resistance rating in which it is installed. This is justified in part by the fact that, under normal conditions of use, the potential fire exposure in the vicinity of a door opening is decreased, since there will usually be a clear space on both sides of the opening for traffic purposes. Since wall assemblies are put together at the site, their uniformity is not as certain as a fire door assembly that is factory assembled (e.g., undesigned penetrations tend to show up in wall assemblies). For this reason, any factor of safety that is tacitly called for in a wall assembly requirement should exceed that of a door assembly. If the opening is not used, combustibles could be piled against the door, and the assumed enclosure protection might not be maintained. I these instances, ratings for the openings should be equivalent to the rating of the wall, or precautions should be taken to prevent storage of combustibles against the doors.

Ref. NFPA 252 Standard Methods of Fire Tests of Door Assemblies

Marcel
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