7.6.1 part 3 the Terminating at one of the following :
Can you explain each one and like an example please.......
A. Center of the doorway
B. Other point at which exit begins
I all has to do with the definition of an exit.
3.3.75* Exit. That portion of a means of egress that is separated from all other spaces of a building or structure by construction or equipment as required to provide a protected way of travel to the exit discharge.
A. Center of the doorway:
In the case of a door leading directly from the street floor to the street or open air, the exit comprises only the door.
B. Other point at which exit begins: This is the point of entry into a stairway or exit passageway.
In the case of a stairway, the exit includes the stair enclosure, the door to the stair enclosure, the stairs and landings inside the enclosure, the door from the stair enclosure to the outside or to the level of exit discharge, and any exit passageway and its associated doors, if such are provided, so as to discharge the stair directly to the outside.
not 101 but good info::
I basically concur with above.
As far as centerline, some people argue over where to measure on a door, and will turn down a plan if it does not reach all parts of the frame of the door.
So I am thinking 101 just said measure to the center of the door, to avoid any arguments.
Concur with B above
The travel distance to an exit shall be measured on the floor or other walking surface as follows:
Along the centerline of the natural path of travel, starting from the most remote point subject to occupancy
Curving around any corners or obstructions, with a 12 in. (305 mm) clearance therefrom
Terminating at one of the following:
Center of the doorway
Other point at which the exit begins
Smoke barrier in an existing detention and correctional occupancy as provided in Chapter 23
As to part B. "Other point at which the exit begins" of your question I would like to add the following in attempt to help clarify what this means.
Here the LSC is allowing for other, less common, situations such as an outside stair with unprotected exterior wall openings (unprotected within 10' horizontal distance) in which case travel distance includes measuring the distance traveled over the stairs to ground level.
More commonly we stop measuring travel distance to an exit when we reach the exit door. However, as provided in "B" there can be certain situations where we must continue to measure travel distance beyond the door.
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