They must open in the direction on the escape path and should never double-swing.
Its flammability potential is virtually non-existent. Also, don't use small rocks or marbles for pot plant. Now we come to my wife's favorite emergency item the all-versatile duct tape. https://Www.hongcheon.go.kr/museum/bbs/board.php?bo_table=free&wr_id=3953221