Is there any rule prohibiting the horizontal exit from annex building to the aircraft hangar in accordance with NFPA 101?
1. So what is the rating on the wall between the two areas?
2 . What type of occupancy/operation in the annex?
3. Maybe a slight problem exiting into a more hazardous area, and discernible route?
5.16 Exit and Access Requirements.
Means of egress from the aircraft hangar shall comply with NFPA 101.
I would look at what use is on the other side of the hanger wall. If say business, like a large office, thaniwould say exiting from the office, thru the hanger is not allowed.
Exit access from rooms or spaces shall be permitted to be through adjoining or intervening rooms or areas, provided that such rooms or areas are accessory to the area served. Foyers, lobbies, and reception rooms constructed as required for corridors shall not be construed as intervening rooms. Exit access shall be arranged so that it is not necessary to pass through any area identified under Protection from Hazards in Chapters 11 through 43.
In relation to NFPA 101, 18.104.22.168, the door separating the annex from hangar space is a horizontal 'exit'. It is not exit access. Is it relevant to consider intervening rooms or areas, I wonder.
Normally you cannot exit into or thru a more hazardous area,
As in if there are business offices on one side, and they are making dynamite on the other side of the wall, the exiting for the business area cannot go thru the dynamite factory.
Horizontal exit or not.
So what is going on in the non hanger side, occupancy , processes, or what??
Nalan wrote: In relation to NFPA 101, 22.214.171.124, the door separating the annex from hangar space is a horizontal 'exit'. It is not egress access. Is it relevant to consider intervening rooms or areas, I wonder.
My perspective is stick to the book so that personal opinions cannot enter into the process. Exit is a define term in NFPA 101. When using the book's defined terminology, "Exit into or thru" has no meaning in the context of Section 7.5.
I agree with Nalan that Subsection 126.96.36.199 under Section 7.5 Arrangement of the Means of Egress is dealing with exit access not the exit itself. I see no reasoning why the horizontal exit will be prohibited by the Life Safety Code.
In the spirit of the NFPA 101, Life Safety Code:
I could not find rules prohibiting the horizontal exit from annex building exists in NFPA 101, Section 7.2.4. Subsection __2.2.5 of the occupancy chapters is where horizontal exits are permitted.
It is not uncommon a hanger would have offices along side of the aircraft hanger where the exterior walls of the hanger at not available for the required exits at 150 ft. intervals.
In the 2018 edition of NFPA 101, provisions that apply to aircraft servicing hangars, which are classified as industrial occupancies, see Section 40.6.
Section 42.6 specifies two alternative methods of providing egress from aircraft storage hangars. Based on there are to be not less than two means of egress from each aircraft storage area.
Except for the requirements on the distance between the exits, do we still need to watch the travel distance limits for industrial occupancy?
What would be the limit for paint hangars? Paint hangars are classified as Extra Hazard Group 2 in NFPA 409 (10.2.2 The protection of an aircraft paint hangar housing unfueled aircraft shall be in accordance with the provisions of NFPA 13 for an extra hazard Group 2 occupancy.). Is this classification relevant to determining the travel distance limits?
Yes. The arrangement of the means of egress and travel distances of Subsections 40.2.5 and 40.2.6 are the provisions considered when using industrial occupancies in the hangers. The high hazard industrial occupancy requirements might be consider for the uses proposed.
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