TAXIING INTO GATE; SVC TRUCK WAS PARKED INCORRECTLY; BUT MARKINGS ON PAVEMENT APPEARED TO SHOW THE TRUCK OUTSIDE OF THE LINE. A DRIVER ON BAGGAGE LOADER WAS WATCHING THE TAXI IN; BUT DIDN'T INDICATE ANY PROB. ACFT WINGTIP HIT THE SVC TRUCK.

Narrative

TAXIING IN AT ORD; APCHING GATE FOR PARKING; IT APPEARED THAT A SVC TRUCK AND BAGGAGE BELT LOADER WOULD BE VERY CLOSE TO R WING. FO STATED THAT THE EQUIP WAS 'BEHIND THE LINE.' I LOOKED AND SAW A BLACK AND WHITE LINE ON THE RAMP WHICH THE EQUIP WAS INDEED PARKED OUTSIDE OF. I LOOKED BACK OUT FRONT TO THE ACCUPARK GUIDANCE LIGHTS AND CONTINUED TO TAXI IN FOR PARKING. THE R WINGTIP STRUCK A CABIN SVC TRUCK WHEN THE ACFT WAS ABOUT 10 FT SHORT OF THE STOP POINT. THE BAGGAGE BELT LOADER; WITH DRIVER SITTING IN THE SEAT WATCHING OUR ACFT APCH THE GATE; WAS PARKED NEXT TO THE CABIN SVC TRUCK; ALSO JUST OUTSIDE THE LINE. THE ACFT'S WINGTIP PASSED BY THE BELT LOADER FIRST; AND THE DRIVER GAVE NO INDICATION OF ANY PROB. THE 'LINE' WE WERE LOOKING AT TURNED OUT TO BE A PAINTED METAL EXPANSION SEAM. RECOMMEND STANDARDIZED RAMP SYMBOLS AND GND WORKERS TRAINED TO GIVE STOP SIGNAL IF THEY SEE A PROB. PLTS OBVIOUSLY SHOULD STOP IF THEY SEE A GND COLLISION HAZARD; BUT UNFORTUNATELY WE THOUGHT WE RESOLVED THE PROB BY WHAT WE SAW PAINTED ON THE RAMP.