Warsaw Radio Mast - Collapse

Collapse

On 8 August 1991 at 16:00 UTC a catastrophic failure, caused by an error in exchanging the guy-wires on the highest stock, led to the collapse of the mast. The mast first bent and then snapped at roughly half its height. The helix building and the transmitter building (including the transmitter devices in it) were not damaged.

An investigating committee determined that blame lay with Mostostal Zabrze, which built and maintained the mast. The construction coordinator and the chief of the Mostostal division that built the mast were accused of causing the collapse. The former was sentenced to two and a half years in prison, the latter to two years.

Since the collapse of the Warsaw radio mast, the tallest structure in Poland has been the FM radio and TV transmission mast at Olsztyn-Pieczewo, measuring 360 metres.

After the collapse, the KVLY-TV mast outside Fargo, North Dakota, USA, regained its title as the world's tallest structure, standing 628.8 m (2,063 ft), until the Burj Khalifa exceeded this height in April 2008.

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