Patent ID: 6378806
Filing Date: 2002-04-30
Classification: B64C

Abstract:
A door structure comprising a door (10) and a frame (30) surrounding said door when said door is closed, said door comprising a number of load bearing beams (2A) each having two beam ends (2Aâ€²) at least one first stop bracket (60) projecting laterally out of said door at each beam end (2Aâ€²), each stop bracket (60) comprising at least first and second stop members (61, 62) each forming a respective first stop surface (600, 601) facing in a load direction (D), said frame comprising at least one second stop bracket (70) for each of said at least one first stop bracket, each said second stop bracket (70) comprising at least first and second stop elements (71, 72), each stop element forming a respective second stop surface (700, 701) facing inwardly for cooperation with a respective first stop surface (600, 601) to hold said door in said frame, wherein said at least two stop members (61, 62) comprise at least one active stop member (61) and at least one redundant stop member (62), wherein said at least first and second stop elements (71, 72) comprise at least one active stop element (71) and at least one redundant stop element (72), whereby under normal operating conditions said active stop member (61) cooperates with said active stop element (71) in holding said door in said frame, and wherein said redundant stop member (62) engages said redundant stop element (72) when said active stop member (61) or said active stop element fails.