Clear width
Measure between the limiting door/hardware surfaces.
SECTION 03 / CS-19
Door openings
Treat clear door width and height as a separate gate from the larger internal cross-section.
Clear height
Measure from the limiting threshold/floor to the clear upper edge.
Threshold
A sill, floor transition or hardware can change the usable approach.
Hardware
Locking bars and door geometry need physical verification.
APERTURE PASS ≠ HANDLING PASS
A static rectangle does not simulate the approach.
Turning room, ramp angle, equipment, door restraint and safe access require an actual-site and responsible-provider check.