Francis Vineyard
REGISTERED
Is this illustration an accurate despection? Thanks in advance.
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2012 1009.3
- Thread starter Francis Vineyard
- Start date
Francis Vineyard
REGISTERED
I think it does; the B.O. doubts it.
Inspector Gift
SAWHORSE
Three words: "serve" "or" "communicate"
Three questions:
1) Do the stairways shown "serve" more than two stories?
2) Does the left stairway atmospherically communicate between more than two stories?
3) Is the bottom of level of the left stairway a separate floor level (or story) than the upper two levels?
If the answer to any of the above 3 questions is "YES" then, IMO, the left stairway does not meet the exception. In fact, I would argue that both stairways serve more than two stories.
Three questions:
1) Do the stairways shown "serve" more than two stories?
2) Does the left stairway atmospherically communicate between more than two stories?
3) Is the bottom of level of the left stairway a separate floor level (or story) than the upper two levels?
If the answer to any of the above 3 questions is "YES" then, IMO, the left stairway does not meet the exception. In fact, I would argue that both stairways serve more than two stories.
Is this the same thing in the 09??
708.2 Shaft enclosure required. Openings through a floor/ceiling assembly shall be protected by a shaft enclosure complying with this section.
Exceptions:
7. In other than Groups I-2 and I-3, a shaft enclosure is not required for a floor opening or an air transfer opening that complies with the following:
7.1. Does not connect more than two stories.
7.2. Is not part of the required means of egress system.
7.3. Is not concealed within the construction of a wall or a floor/ceiling assembly.
7.4. Is not open to a corridor in Group I and R occupancies.
7.5. Is not open to a corridor on nonsprinklered floors in any occupancy.
7.6. Is separated from floor openings and air transfer openings serving other floors by construction conforming to required shaft enclosures.
7.7. Is limited to the same smoke compartment.
708.2 Shaft enclosure required. Openings through a floor/ceiling assembly shall be protected by a shaft enclosure complying with this section.
Exceptions:
7. In other than Groups I-2 and I-3, a shaft enclosure is not required for a floor opening or an air transfer opening that complies with the following:
7.1. Does not connect more than two stories.
7.2. Is not part of the required means of egress system.
7.3. Is not concealed within the construction of a wall or a floor/ceiling assembly.
7.4. Is not open to a corridor in Group I and R occupancies.
7.5. Is not open to a corridor on nonsprinklered floors in any occupancy.
7.6. Is separated from floor openings and air transfer openings serving other floors by construction conforming to required shaft enclosures.
7.7. Is limited to the same smoke compartment.
Francis Vineyard
REGISTERED
2009 could work having single exits for the first two stories to the right hand stair in accordance with 1021.2.
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 along the natural and unobstructed path of egress travel to an exterior exit door at the level of exit discharge, an entrance to a vertical exit enclosure, an exit passageway, a horizontal exit, an exterior exit stairway or an exterior exit ramp, shall not exceed the distances given in Table 1016.1.
Exceptions:
1. Travel distance in open parking garages is permitted to be measured to the closest riser of open exit stairways.
2. In outdoor facilities with open exit access components and open exterior exit stairways or exit ramps, travel distance is permitted to be measured to the closest riser of an exit stairway or the closest slope of the exit ramp.
3. In other than occupancy Groups H and I, the exit access travel distance to a maximum of 50 percent of the exits is permitted to be measured from the most remote point within a building to an exit using unenclosed exit access stairways or ramps when connecting a maximum of two stories. The two connected stories shall be provided with at least two means of egress. Such interconnected stories shall not be open to other stories.
4. In other than occupancy Groups H and I, exit access travel distance is permitted to be measured from the most remote point within a building to an exit using unenclosed exit access stairways or ramps in the first and second stories above grade plane in buildings equipped throughout with an automatic sprinkler system in accordance with Section 903.3.1.1. The first and second stories above grade plane shall be provided with at least two means of egress. Such interconnected stories shall not be open to other stories.
Where applicable, travel distance on unenclosed exit access stairways or ramps and on connecting stories 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.
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 along the natural and unobstructed path of egress travel to an exterior exit door at the level of exit discharge, an entrance to a vertical exit enclosure, an exit passageway, a horizontal exit, an exterior exit stairway or an exterior exit ramp, shall not exceed the distances given in Table 1016.1.
Exceptions:
1. Travel distance in open parking garages is permitted to be measured to the closest riser of open exit stairways.
2. In outdoor facilities with open exit access components and open exterior exit stairways or exit ramps, travel distance is permitted to be measured to the closest riser of an exit stairway or the closest slope of the exit ramp.
3. In other than occupancy Groups H and I, the exit access travel distance to a maximum of 50 percent of the exits is permitted to be measured from the most remote point within a building to an exit using unenclosed exit access stairways or ramps when connecting a maximum of two stories. The two connected stories shall be provided with at least two means of egress. Such interconnected stories shall not be open to other stories.
4. In other than occupancy Groups H and I, exit access travel distance is permitted to be measured from the most remote point within a building to an exit using unenclosed exit access stairways or ramps in the first and second stories above grade plane in buildings equipped throughout with an automatic sprinkler system in accordance with Section 903.3.1.1. The first and second stories above grade plane shall be provided with at least two means of egress. Such interconnected stories shall not be open to other stories.
Where applicable, travel distance on unenclosed exit access stairways or ramps and on connecting stories 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.
Last edited by a moderator:
steveray
SAWHORSE
The unenclosed exit access stair is new to alot of people....And for the most part I agree with IG. The third stair might comply with this section....
Francis Vineyard
REGISTERED
After further consideration where it states exit access stairways that serve . . . only two stories, are not required to be enclosed.
I think that means all other stories must be of fire barrier construction as applicable (1009.3.1) with openings protected.
Though the commentary is not code; it opines openings from other stories are permitted provided they are protected as described;
"Exception 1 allows an open exit access stairway when the opening is only between two floors. There cannot be any other unprotected openings that connect to other floors since this could create a staggered stack effect for the movement of smoke between multiple stories. In two-story buildings, this wold allow for open stairways between the basement and ground level or between the first and second floors. Another example would be an open exit access stairway between the fifth and sixth floors of a building, provided there were no other unprotected openings between the fourth and fifth floor or the sixth and seventh floors. this is consistent with Section 712.1.8 of the IBC for openings between two stories. his exception would not be permitted in jails or institutional facilities, like nursing homes or hospitals. These spaces commonly use smoke compartmentation for protection with defend-in-place evacuation plans.
I think that means all other stories must be of fire barrier construction as applicable (1009.3.1) with openings protected.
Though the commentary is not code; it opines openings from other stories are permitted provided they are protected as described;
"Exception 1 allows an open exit access stairway when the opening is only between two floors. There cannot be any other unprotected openings that connect to other floors since this could create a staggered stack effect for the movement of smoke between multiple stories. In two-story buildings, this wold allow for open stairways between the basement and ground level or between the first and second floors. Another example would be an open exit access stairway between the fifth and sixth floors of a building, provided there were no other unprotected openings between the fourth and fifth floor or the sixth and seventh floors. this is consistent with Section 712.1.8 of the IBC for openings between two stories. his exception would not be permitted in jails or institutional facilities, like nursing homes or hospitals. These spaces commonly use smoke compartmentation for protection with defend-in-place evacuation plans.