Manual Pull Station requirements within 240ft. Aircraft Hangar Door

[jp81873]

A local AHJ on an aircraft hangar project that my firm is working on is requesting the addition of fire alarm manual pull stations at the man doors within a 240ft.long aircraft hangar door. Keep in mind the 240ft.long hangar door is operable so a hard wired connection would not be optimum. Has anyone ran into this dilema before and how was it rectified, any help would be greatly appreciated. Thanks

 

[pipesnpumps]

Whoa. now that is interesting. I'm picturing a bunched cable, like you would see on a powered monorail; with a track for the wheels that hold the top of each "loop" of the cable bunch. Door lowers, drags out the slack of the cable. door raises, pushes the cables back up.

It could be done as simply as using a residential garage door track.

 

[cdafd]

Why does it have pulls to begin with???

What fire code are they under ??

Do they have a code / standard section to reference requirement?? Any other hangers on property with pulls in the door??? Where dothey want the a/vs???

Did they do plan review or is this a plan review question???

 

[jp81873]

Why does it have pulls to begin with???

REQUIRED BY NFPA 72 AND NFPA 101

What fire code are they under ??

NFPA 72, NFPA 101, UFC 4-211-01N Aircraft Maintenance Hangars: Type I, Type II and Type III

Do they have a code / standard section to reference requirement??

NFPA 101 SECTION 9.6.2.4

Any other hangers on property with pulls in the door? TBD

Where do they want the a/vs???

NOT REQUESTING THEM TO BE MOUNTED WITHIN 240FT. LONG HANGAR DOOR, WALL MTD. DEVICES WITHIN SPACE ARE SUFFICIENT.

Did they do plan review or is this a plan review question???

NO THIS PROJECT IS IN CONSTRUCTION, THIS REQUEST CAME FROM THE FIRE CODE OFFICIAL INSPECTION.

 

[pipesnpumps]

You forgot,
UFC 3-600-01 Fire Protection Engineering for Facilities
Architectural Barriers Act (ABA)
Uniform Federal Accessibility Standard (UFAS)*
*a new addition

I am not sure if there is anything within ABA or UFAS that trumps NFPA 101 for manual pulls.. Probably not.

You need to point him to section 42.3.4.2 of NFPA 101. It is the ACTUAL governing requirements for a building designated as storage occupancy, and does not require manual pulls where there is an approved NFPA 13 compliant sprinkler system, which no doubt you have.. In that case NFPA 101 only requires the one manual pull (for when the sprinklers are out of service).

If the hanger is designated as something other than storage, just go to the X.3.4 section of that occupancy chapter, there will be similiar wording.

AFB inspectors are usually pretty sharp, but I'm sure its just the luck of the draw..

 

[pipesnpumps]

Just an after thought.. is this "pull station" by any chance really an actuation switch (yellow and marked foam) that is going to be used to actuate a foam system?

In that case NFPA 409 7.7.4 could rule, because it requires it to be "located in the normal paths of exit from the area"