EMPLOYEE WAS OPENING A 10""X8"" DOOR TO CLEAN OUT A CLOGGED CHUTE. STEEL DOOR IS HELD IN PLACE WITH HANDLES AND TABS. HE LOOSENED DOOR AND WHEN HE PULLED IT OUT, THE WEIGHT OF THE DOOR WAS MORE THAN HE EXPECTED AND IT DROPPED SEVERAL INCHES, PINCHING HIS FINGER AGAINST AN ADJACENT STEEL BEAM. THE IMPACT CAUSED BRUISING AND FRACTURE OF HIS RIGHT FOURTH FINGER. DOOR HAS BEEN MODIFIED.