LARGE-SIZED OPENING SECTION DOOR DEVICE AND REPAIRING METHOD OF LARGE-SIZED OPENING SECTION DOOR

摘要

PROBLEM TO BE SOLVED: To provide a large-sized opening section door capable of surely opening the large-sized opening section even if a disaster such as an earthquake or the like occurs. SOLUTION: A portal frame 2 connected to a building skeleton P is separately erected from the building skeleton P on a forward position of the large-sized opening section in the building skeleton P. Door members 3 are arranged on the inside of the portal frame 2, and the portal frame 2 has restorability higher than earthquake resistance of the building skeleton P.