Weather stripping common corridor doors

The reference guide has a footnote related to this situation that I think provides your answer. On page 416 of the D&C reference guide, footnote 1 states that If the common hallways are pressurized with respect to the residential units then doors in the residential units leading to the common hallways need not be weather stripped provided that the positive differential pressure is demonstrated as in Case 1, Option 2 of the prerequisite." Case 1, Option 2 states that the building must "operate exhaust sufficient to create a negative pressure differential with the surrounding spaces of at least an average of 5 Pascals (Pa) (0.02 inches of water gauge) and a minimum of 1 Pa (0.004 inches of water gauge) when the doors to the smoking room (residential unit in our case) are closed."

Good question. I think you should defer submission of the prerequisite until the construction submission. This would be required anyway if you need to demonstrate acceptable sealing of residential units through blower door testing.

does anyone have an example calculation on this?