CPOT not my question

[cda]

Just wondering what the answer might be:


If there is a mechanical room located in the center of a roof and the distance from the most remote part of the mechanical room to the only exit stair off the roof is more than 100 ft., (common path of travel), is a second means of egress required (via a stair or alternating tread device).

 

[north star]

~ @ ~


Which Code section are you using to reference the
100 ft. limitation ?


~ @ ~

 

[steveray]

What is the access to the roof like?

 

[cda]

I don't know

They said the odd one

2012 101

What would be the answer in IBC say 2009?

 

[steveray]

1021.1 Exits from stories. All spaces within each story shall
have access to the minimum number of approved independent
exits as specified in Table 1021.1 based on the occupantloadof
the story For the purposes of this chapter, occupied roofs shall
be provided with exits as required for stories.

I don't know that I would call it an occupied roof if it were just a mechanical room...Basically an enclosed RTU....

 

[north star]

@ ~ @


I agree with **steveray**, in that the Mech. Room would
not be an occupiable room \ space.

I say that a 2nd MOE is not required !

Now, ...go find a Code section to dispute this !


@ ~ @

 

[Francis Vineyard]

"Free egress from the roof to the stairwell is required for occupied roofs, but is not mandated by the IBC or NFPA 101 for unoccupied roofs." http://idighardware.com/2011/11/roof-access-and-egress/

 

[cda]

From 2012 101::


7.12.2

Stories used exclusively for mechanical equipment, furnaces, or boilers shall be permitted to have a single means of egress where the travel distance to an exit on that story is not in excess of the common path of travel limitations of 7.12.1.

 

[steveray]

How big is the mechanical room? Should it really be considered a "story"

STORY. That portion of a building included between the upper
surface of a floor and the upper surface of the floor or roof next
above (also see "Basement," "Mezzanine" and Section 502.1).
It is measured as the vertical distance from top to top of two
successive tiers of beams or finished floor surfaces and, for the
topmost story, from the top of the floor finish to the top of the
ceiling joists or, where there is not a ceiling, to the top of the
roof rafters.

PENTHOUSE. An enclosed, unoccupied structure above the
roof of a building, other than a tank, tower, spire, dome cupola
or bulkhead.

 

[ADAguy]

Sounds like a "Mechanical penthouse".

 

[Francis Vineyard]

[BG] 1510.2.3 Use limitations. Penthouses shall not be used for purposes other than the shelter of mechanical or electrical equipment, tanks, or vertical shaft openings in the roof assembly.

Commentary: The use of the penthouse is also limited. Regardless of height or area, roof structures used for anything except sheltering electrical or mechanical equipment or vertical shaft openings must be considered as an additional story.

 

[ADAguy]

"Clarity" of definition, that's what I like and thank you for.
Now if all definitions could be so clear and concise.
Say what you mean and mean what you say.