DUBAI: Dubai is set to open the world’s tallest building amid tight security on Monday, celebrating the tower as a bold feat on the world stage despite the city state’s shaky financial footing. But the final height of the Burj Dubai - Arabic for Dubai Tower - remained a closely guarded secret on the eve of its opening. At more than 800 metres, it long ago vanquished its nearest rival, the Taipei 101 in Taiwan. The Burj’s record-seeking developers didn’t stop there. The building boasts the most stories and highest occupied floor of any building in the world, and ranks as the world’s tallest structure, beating out a television mast in North Dakota. Its observation deck — on floor 124 — also sets a record.