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Exiting from a room using table 1019.2

R

retire09

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I have a small assembly tenant with an occupant load under 50 on the second floor of an airport terminal.

I am classifying the use as a B (assembly under 50) and seeing on table 1019.2 that a B "2 story" maximum load is 30 for one exit and a maximum travel distance of 75'. My question is how do you measure the travel distance?

Is it the maximum distance from the most remote place in the room to the door that would exit from that room or is it the distance to an exit from the grade level of the building ? Could you point me to the code sections that clarify this?

Years ago I thought I understood this, but now I'm not so sure.

Thanks
 
Is it a two story building? Table 1019.2 refers to two story buildings, not the second floor of a multi story building. Could the space be considered as a mezzanine? The cross reference to 1015.2 would limit the common path of travel, not the distance to the outside exit.
 
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This is a 2 story building and nothing but this tenant is on the second story. (not a mezzanine)

Table 1015.1 would limit the load to 49 and does not mention a second story limitation of 30.

Can I go to 49 with one exit from the space?
 
Hopefully an airport terminal is not a single-exit building. I'll bet you should be using 1015.1 and Table 1015.1 instead, as a space with one means of egress, which would allow 49 occupants. You'd more than likely be limited by the common path of egress travel of 75' as Coug Dad pointed out.

2006 IBC:

1015.1 Exit or exit access doorways required.

Two exits or exit access doorways from any space shall be provided where one of the following conditions exists:

1. The occupant load of the space exceeds the values in Table 1015.1.

2. The common path of egress travel exceeds the limitations of Section 1014.3.

3. Where required by Sections 1015.3, 1015.4 and 1015.5.

Exception: Group I-2 occupancies shall comply with Section 1014.2.2.

Travel distance would be this:

1016.1 Travel distance limitations.

Exits shall be so located on each story such that the maximum length of exit access travel, measured from the most remote point within a story to the entrance to an exit along the natural and unobstructed path of egress travel, shall not exceed the distances given in Table 1016.1.

Where the path of exit access includes unenclosed stairways or ramps within the exit access or includes unenclosed exit ramps or stairways as permitted in Section 1020.1, the distance of travel on such means of egress components shall also be included in the travel distance measurement. The measurement along stairways shall be made on a plane parallel and tangent to the stair tread nosings in the center of the stairway.

Exceptions:

1. Travel distance in open parking garages is permitted to be measured to the closest riser of open stairs.

2. In outdoor facilities with open exit access components and open exterior stairs or ramps, travel distance is permitted to be measured to the closest riser of a stair or the closest slope of the ramp.

3. Where an exit stair is permitted to be unenclosed in accordance with Exception 8 or 9 of Section 1020.1, the travel distance shall be measured from the most remote point within a building to an exit discharge.

Common path of egress travel would be: That portion of exit access which the occupants are required to traverse before two separate and distinct paths of egress travel to two exits are available. Paths that merge are common paths of travel. Common paths of egress travel shall be included within the permitted travel distance.
 
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For the purposes of determining the number of exits using Section 1019.2, the travel distance referred to is the travel distance to an exit, not the CPET. Travel distance is defined in Section 1016 as "measured from the most remote within a story to an entrance to an exit..." so in your case, it would most likely be an exterior door at grade.
 
retire

1. I take it this is existing

2. how many sq ft is on the second floor

3. how many spaces/ offices up there

4. are the stairwells protected or open
 
Travel distance would be 200' non-sprinklered or 300' sprinklered assuming 2 or more exits on 1st floor. If you really have a single-exit building, then HD nailed it.
 
retire09:

You don't state which code edition is applicable, so I assume the 2006 IBC based on the table you referenced. The 2009 IBC clarifies the use of this table (Table 1021.2 in the 2009 IBC) by retitling it "Stories with one exit."

A second story requires two exits, regardless of number of occupants (See Table 1019.1, 2006 IBC). Table 1015.1 is only applicable to "Spaces with one means of egress" and not stories Table 1019.2 would be applicable if the travel distance is 75 feet to an "exit": this can be an exit stair in a vertical exit enclosure, horizontal exit, exit passageway that leads to the exterior or vertical exit enclosure, or exterior ramp or stairway.

The reason they limit the travel distance to 75 feet is that it is in line with the CPET requirements (without the sprinkler extension). So, in a sense, it is a CPET and the travel distance.
 
RLGA

1019 also refers back to 1015 to allow small second stories to have a single exit if the 75 foot CPT is acheived to the first floor where you would then have access to two separate exits. If only one exit is provided from the first floor, then 75 feet would apply.
 
1015 is for "spaces" with one exit. Table 1019.2 regulates "stories." The term "travel distance" in this table refers to travel to an exit and should not be confused with CPET. And (with a disclaimer that it's not code) the IBC Commentary backs that up with "The exit access travel distance is measured along the natural and unobstructed path to the exit, as described in Section 1016.1." (page 10-109 of the 2006). I am assuming the OP is using this edition because of the 1019.2 reference, it's 1021.2 in the 2009. If this table was meant to be used with CPET, it would have stated that.
 
High Desert: I'm just mentioning the CPET because the travel distance (which is a common path because of the one exit) is limited to 75 feet--it's the same distance limitation for a CPET. I agree that CPET is truly not applicable because travel distance is more restrictive in that it must terminate at an exit, whereas a CPET does not have to.

steveray: Footnote d is only applicable to 1-story B buildings. The footnote is not used for the 2-story B use.

Coug Dad: Are you referring to item #3 of Section 1019.2? If so, the item is only applicable to "single-level buildings" (See Code and Commentary, page 10-109). If your reference is to Section 1019.1, then again, it is only indicating that "spaces" on another floor may have one exit access door if applicable, but the story is still required to have two exits (See Code and Commentary, page 10-108).
 
It is an existing area.

Total area of about 800sf.

Entire space is occupied by a bar.

There is an unprotected stair and an elevator to the 1st floor.

When determining the occupant load a storage area, restrooms and an entry area were omitted from the net floor area and the remainder was calculated at 1 per 15sf.

When you count actual seats at tables and the bar the load is under 30.

We are still using the 2006 IBC
 
Occupant load should be determined at 15sf/occupant, not by number of seats. If the number of seats exceed the number of occupants determined by calculation, then you can base it on a higher occupant load per Section 1004.2. You can use a lower number per the exception to Section 1004.1.1, but it must be approved by the BO.
 
I'm not sure I would omit the entry area, either. If there is a wait, that is where they tend to stand. It sounds like you're going to be very close on occupant load. They could increae the size of the storage area to reduce the assembly space.

Item 1 of 2006 IBC 1019.2 refers you to the table, which allows the single exit for the second story with 30 occupants and 75' travel distance to an exit. The 2009 has moved it to 1021.2, lowered the number of occupants to 29, and clarified the intent by changing the title of the table to "Stories with One Exit."
 
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