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Hello. I see in the 2010 rentable area standard that a fire-rated egress corridor leading from an interior exit stair to the street may be counted as Building Service Area. If the interior exit stair (in a building tower, say) is connected by a similar corridor to another exit stair closer to the perimeter (say, at the Ground and First Floors), does this egress corridor get counted as Building Service? Or is it Major Vertical Penetration? Thanks!
Page 30, Section 3.4 of the Standard indicates that "discharge corridors" are indeed Building Service Area. It is reasonable that a corridor of similar function which connects two (or more) egress stairs should also be treated as Building Service Area. To further strengthen this position, it is worth noting that the corridor itself does not meet the criteria to be considered a Major Vertical Penetration.