IPC 2013 : E01D 15/04 : Swing bridges.

IPC2013 > E > E01 > E01D > E01D 15/00 > E01D 15/04[1] > Swing bridges.
Notes[t] E01 - E06: BUILDING
E SECTION E — FIXED CONSTRUCTIONS.
E01 CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES.
E01D BRIDGES (bridges extending between terminal buildings and aircraft for embarking or disembarking passengers B64F 1/305).
E01D 15/00 Movable or portable bridges (arrangement of ship-based outboard ramps or gangways  B63B 27/14; loading ramps B65G 69/28 ); Floating bridges.
E01D 15/04 · Swing bridges.