Panel EP-3 requires a 36 inch clear working space in front of it mounted on the north wall of Electrical Room 118. Door D-12 swings into the same room with a 36 inch swing radius centered 6 inches off the north wall, meaning the door swing will encroach into the required NEC clear working space in front of the panel, creating a physical/functional conflict.
Structural beam B-4 limits clear height in Corridor 104 to 9'0" AFF, but mechanical clause requires ductwork DS-2 (including insulation) in the same corridor to maintain a minimum clearance of 9'6" AFF. The duct clearance requirement exceeds the clear height available beneath the beam, making the two requirements physically incompatible unless the duct is routed around or through the beam.
Beam B-7 provides only 8 feet 6 inches of clear height above finished floor in Corridor 109, but mechanical ductwork DS-4 in the same corridor requires clearance to the bottom of duct insulation of 8 feet 6 inches above finished floor. Since the duct must be routed below the beam (or through the same overhead space), the duct's required 8'-6" clearance leaves zero margin below the beam's 8'-6" clear height, meaning the duct insulation would either collide with the beam or the stated clearance cannot physically be achieved simultaneously with the beam's clear height requirement.
Mechanical clause requires 9'6" clearance above finished floor to bottom of duct insulation for DS-2 in Corridor 104, but structural beam B-4 in the same corridor only provides 9'0" of clear height. The duct cannot achieve the required clearance while routing beneath or through the beam's clear height envelope, resulting in a physical clash.
Structural beam B-7 provides only 8'-6" clear height above finished floor in Corridor 109, which is the same as the required minimum clearance to the bottom of duct insulation for DS-4. Since duct insulation adds thickness below the duct bottom, and the duct itself must be mounted below the beam, there is no physical room for the duct plus insulation to achieve 8'-6" clearance while also clearing the beam soffit at exactly 8'-6". This leaves zero margin for the duct and insulation thickness, hangers, or flanges, making the two requirements physically incompatible.
Door D-12 swings into Electrical Room 118 with a 36 inch arc centered 6 inches off the north wall, directly overlapping the NEC-required 36 inch clear working space in front of Panel EP-3, which is mounted on the north wall of the same room. The door swing would encroach into the panel's required clear working space, violating NEC clearance requirements.