Candidate boundary classification
composed lobby end wall with paired glazed passage, directory and Elevator No. 2 finished entranceUse the W-217 zero-thickness analytical Bay P composition as separate door and elevator entrance; retain W3 segment only as a coarse host locator.
Drawing notation: BAY P
W3 shows a controlled lobby-to-foyer passage at Bay P. The W-217 registration gives a more reliable central door and elevator-entrance alignment than the old W3 threshold trace. Pixel axis is a candidate locator, not an accepted wall face.