When is a rated corridor required

If two separate and distinct corridors are provided and each serves less than 30, then they do not need to be rated. If I bisect the suite in two with a wall there are less than 30 on each side and only need access to a single exit and that works perfectly for travel distance and all other requirements. If I place a cross corridor door in this wall to allow the suites to interconnect how does that really effect the exiting Ok,, hopefully a plan will help.

The portion of the floor we are concerned about is the suite area along the top of the page with 43 occupants. I have drawn a red line to bisect the suite area. I believe access to two exits is much safer and do not see the value in the rated corridor in this instance. A cross corridor door here acceptable to allow access to two exits if needed without triggering the rated corridor? I would much prefer access to two exits , and obviously no internal rated corridor.

If you are talking about the entire area at the top of the "new rated corridor, actual corridor" I would not consider that area to have a corridor. What is the total sq ft of that entire top area?? If you put a wall there you may be creating a dead end on second look, not which would also not be allowed Also might cause a CPET issue as now you would have to get into the corridor before you would have choice of 2 60 now on the right side?

Last edited: Jul 29, Joined Oct 27, Messages Usually when arriving at an interpretation that is logically less safe, something is wrong with the solution like adding doors, reducing exits.

This is not a corridor,There are cabinets, admin areas, seating, copy space, all open This space does meet the definition and requirements of intervening "area" or "room". JBI Registered User. The Code is a minimum standard. Why people try so hard to do less will never cease to amaze me. A one hour rated wall with rated doors is just not that much more expensive than what will be installed anyway. I doubt hollow core luan doors are in the specs, and they're probably putting GWB on the walls and ceilings possibly drop ceilings, but even a rating there won't break the bank.

I don't think there's a conflict between Exception 4 in A dead-end corridor shall not be limited in length where the length of the dead-end corridor is less than 2. Exceptions: Use of a corridor as a source of makeup air for exhaust systems in rooms that open directly onto such corridors , including toilet rooms, bathrooms, dressing rooms, smoking lounges and janitor closets, shall be permitted, provided that each such corridor is directly supplied with outdoor air at a rate greater than the rate of makeup air taken from the corridor.

Where located within a dwelling unit , the use of corridors for conveying return air shall not be prohibited. Where located within tenant spaces of 1, square feet 93 m 2 or less in area , utilization of corridors for conveying return air is permitted.

Incidental air movement from pressurized rooms within health care facilities , provided that the corridor is not the primary source of supply or return to the room. Use of the space between the corridor ceiling and the floor or roof structure above as a return air plenum is permitted for one or more of the following conditions: The corridor is not required to be of fire-resistance -rated construction.

The corridor is separated from the plenum by fire-resistance -rated construction. The air- handling system serving the corridor is shut down upon activation of the air- handling unit smoke detectors required by the International Mechanical Code. The air- handling system serving the corridor is shut down upon detection of sprinkler water flow where the building is equipped throughout with an automatic sprinkler system.

The space between the corridor ceiling and the floor or roof structure above the corridor is used as a component of an approved engineered smoke control system. Exceptions: Foyers, lobbies or reception rooms constructed as required for corridors shall not be construed as intervening rooms.

Enclosed elevator lobbies as permitted by Item 1 of Section P Bookmark. Section Means of Egress, Corridors Corridors shall be fire-resistance rated in accordance with Table The corridor walls required to be fire-resistance rated shall comply Corridors shall An exit passageway UpCodes Premium.

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