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Headroom

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cda

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Does a ceiling mounted exit sign fall under, if it is below required minimum hieght??::


1003.3.1 Headroom.
Protruding objects are permitted to extend below the minimum ceiling height required by Section 1003.2 where a minimum headroom of 80 inches (2032 mm) is provided over any walking surface, including walks, corridors, aisles and passageways. """""Not more than 50 percent of the ceiling area of a means of egress shall be reduced in height by protruding objects."""""


Thanks
 
So what does this black and white mean??

"""Not more than 50 percent of the ceiling area of a means of egress shall be reduced in height by protruding objects."""""
 
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"So what does this black and white mean??

"""Not more than 50 percent of the ceiling area of a means of egress shall be reduced in height by protruding objects."""""
Click to expand...
One scenario might be where parts of a stairway might be in the MOE,
and they had to frame around it, and then wrap in gyp. board to seal it off.

Imagine a diagonal portion of the stairway in the MOE corridor, that "could"
reduce the ceiling height significantly.

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north star said:
% % %

One scenario might be where parts of a stairway might be in the MOE,
and they had to frame around it, and then wrap in gyp. board to seal it off.

Imagine a diagonal portion of the stairway in the MOE corridor, that "could"
reduce the ceiling height significantly.

% % %
Click to expand...

That is the example in the commentary
 
cda said:
"""Not more than 50 percent of the ceiling area of a means of egress shall be reduced in height by protruding objects."
Click to expand...

That 50% business is limiting application of the 80-inch exception. Protruding objects hanging down to 80" above the floor can cover no more than 50% of the area, the rest of area has to comply with the higher ceiling height limit.
 
image.jpeg


From the good book, concordance issue
 

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Typically ceiling hung exit signs are centered on doorways, that being the case a projection below the door header could be bumped into vs a door closer which tends to be off to one side.
 
@ ~ @ ~ @


Surface mounted Lighting fixtures is another example of
a reduction in the headroom.......Maybe even some
exposed HVAC ducting, or plumbing pipes, or electrical
conduit.


@ ~ @ ~ @
 
Am I to assume that the ceiling height in this instance is only 80"? Too low for a corridor, no?
 
ADAguy said:
Am I to assume that the ceiling height in this instance is only 80"? Too low for a corridor, no?
Click to expand...

It is a question because of another question.

But if the scenario happens can the exit sign be located below 80"????
 
only if mounted on a side wall and doesn't project more than 4".

Ask Sharon Toji of Toji Signs, Long Beach, she being the queen of signs.
 
No, lights and sprinkler heads can not go below 80" in a circulation path. They can go below the minimum ceiling height of 7'-6". The only things that can go below 80" are door closers and stops and they can only go to 78" (2015 IBC 1003.3.1).
 
The rest of the story:::


A barrier shall be provided where the vertical clearance is less than 80 inches (2032 mm) high. The leading edge of such a barrier shall be located 27 inches (686 mm) maximum above the floor.
 
If I can play code trivia for a moment, door closers aren't the only thing allowed below 78" in an exit path:
On a 78" door frame head, the "stop" is about 1/2" thick and therefore about 77.5" high.

933a6b32-6045-4b09-b15a-e00eaf99e292w.jpg
 
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